Process Of Treating Scrap Or Waste Product Containing Solid Organic Polymer To Recover A Solid Polymer Therefrom Patents (Class 521/40)
  • Patent number: 7893195
    Abstract: Method for recovering a polymer from a liquid medium (1) substantially containing the polymer and a solvent for the latter, wherein: (a) this liquid medium (1) is injected into a reactor (2) containing a stirred substantially monophase liquid mixture comprising a major fraction by weight of a non-solvent and a minor fraction by weight of a solvent, the mixture having a composition and temperature such that the polymer precipitates therefrom progressively; (b) the polymer is recovered in the form of particles in suspension (5) in a liquid rich in non-solvent; (c) the polymer particles (9) are separated from the liquid.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: February 22, 2011
    Assignee: SOLVAY (Societe Anonyme)
    Inventors: Eric Fassiau, Bernard Vandenhende, Jean-Raphael Caille, Jean-Christophe Lepers
  • Patent number: 7893120
    Abstract: A pulverized thermoplastic resin product such as a pulverized thermoplastic product containing a black pigment, a mixture of a pulverized thermoplastic product containing a colored pigment and a pulverized thermoplastic product containing a colored pigment, or a pulverized thermoplastic product containing two or more different colored pigments can be converted into colored reclaimed resin particles by a method comprising the steps of mixing the pulverized resin product with a white pigment and a black pigment, melting the resulting mixture, and converting the molten mixture into solid particles. The colored reclaimed resin products can be utilized in various field.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: February 22, 2011
    Assignee: UBE Industries, Ltd.
    Inventors: Yoshiki Suzuki, Tatsushi Ako, Yukimasa Tanaka, Saburou Hinenoya, Yasuo Kita
  • Publication number: 20110034570
    Abstract: The present invention provides, e.g., methods to recycle and/or reduce plastic, non-plastic, or a combination thereof, from a waste stream. The methods of the present invention include contacting the plastic waste with infrared (IR) energy at one or more frequencies and at one or more intensities, over a period of time effective to heat plastic present in the plastic waste.
    Type: Application
    Filed: September 20, 2010
    Publication date: February 10, 2011
    Inventors: Peter Anthony Smith, Adam J. Koffler, Philip Mark Smith
  • Patent number: 7884140
    Abstract: Techniques for creating recycled plastic materials from waste plastic materials are described. A recycled plastic material contains at least a primary polymer, a secondary polymer, and residual additives. Predetermined properties of the recycled plastic material can be controlled by selecting the types of waste plastic materials used in the recycling feed, determining the types and amounts of recycled plastic material recovered from a separation process and blending the recycled plastic material with other materials.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: February 8, 2011
    Assignee: MBA Polymers, Inc.
    Inventors: Brian L. Riise, Laurence E. Allen, III, Ron C. Rau, Michael B. Biddle
  • Patent number: 7868052
    Abstract: A recovered disc of a structure in which plural disc substrates are bonded together with an adhesive, is to be recycled. To this end, there is provided a recycling method for a recovered disc wherein a recovered disc, containing a material of at least one coating film, out of a reflective film, a recording film, a protective film and an ink film, deposited on a disc substrate in addition to an adhesive used for bonding a plurality of the disc substrates together, is used as a starting material for preparing a flame retardant resin composition or resin molded product.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: January 11, 2011
    Assignee: Sony Corporation
    Inventor: Yasuhito Inagaki
  • Patent number: 7855238
    Abstract: A molding composition comprising (a) from 5 to 90 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) at least one residue derived from the polyethylene terephthalate component, and (b) from 5 to 40 wt % of a polyalkylene terephthalate component; wherein the modified polybutylene terephthalate random copolymer, the polyalkylene terephthalate component, and optionally, at least one additive, have a combined weight % of 100 wt %. Methods for making the composition and articles made from the composition.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: December 21, 2010
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Kristen Cohoon, Ganesh Kannan, Kenneth Frederick Miller, Dhaval Shah
  • Patent number: 7855237
    Abstract: The method for the manufacture of foamed or foamable polymer particles employs a mixture of a polymer melt and a recycled polymer melt produced from recycled, propellant-containing polymer particles. The associated plant for the manufacture of the foamed or foamable polymer particles is provided with an apparatus for the processing of recycled, propellant-containing polymer particles.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: December 21, 2010
    Assignee: Sulzer Chemtech AG
    Inventor: Philip Nising
  • Publication number: 20100317752
    Abstract: A delinking composition in the form of a combined solid dose comprising: (i) one or more elastomer delinking accelerators selected from the group consisting of zinc salts of thiocarbamates and zinc salts of dialkyl dithiophosphates; and (ii) one or more elastomer delinking accelerators selected from the group consisting of 2-mercaptobenzothiazole or derivatives thereof, thiurams, guanidines, 4,4?-dithiomorpholine and sulpenamides; and (iii) at least one elastomer delinking activator.
    Type: Application
    Filed: August 21, 2006
    Publication date: December 16, 2010
    Applicant: ELASTOMER TECHNOLOGIES LTD
    Inventor: Tan Sri Dr. Balachandra Chakkinggal Sekhar
  • Patent number: 7851514
    Abstract: The invention provides a process for producing a recycled resin, which includes: a first step of decomposing a resin composition containing a thermosetting resin in a supercritical or subcritical solvent having a monomer constituting the thermosetting resin or a derivative thereof as an essential component and a second step of adding a polyfunctional compound thereto to process; a recycled resin or a processed and recovered matter obtained according to the process for producing; a recycled resin composition formed from a recycled resin and/or a processed and recovered matter of the resin composition; and a method for recycling a resin composition, which reuses said recycled resin and/or said processed and recovered matter of a resin composition as a raw material of a recycled resin composition.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: December 14, 2010
    Assignee: Sumitomo Bakelite Company, Ltd.
    Inventors: Junya Goto, Masaki Ishikawa, Kazunori Shimoyachi
  • Publication number: 20100311849
    Abstract: A process is provided for making a reactive-block-copolymer chain extender and for using the chain extender to couple polymer chains together for increasing the average molecular weight of the polymer chains. The chain extender can be reacted with polymeric materials that have functional groups and low molecular weight to couple polymer chains together and increase the average molecular weight, thereby increasing intrinsic viscosity and improving properties of the polymeric material. The chain extender is particularly useful for recycling polyethylene terephthalate (PET) and other polymers with functional groups and is also useful as a surface modifier and as a compatibilizer for polymeric materials that do not have reactive functional groups, such as polyethylene, polypropylene and polystyrene.
    Type: Application
    Filed: May 27, 2010
    Publication date: December 9, 2010
    Applicant: CID Centro de Investigacion y Desarrollo Tecnologico SA de CV
    Inventors: Alfonso González Montiel, Leticia Flores Santos, Pablo Esparza Hernández
  • Patent number: 7846986
    Abstract: Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent introduced gradually into the solution to form the precipitation medium, whereby: in the course of the introduction of the non-solvent into the precipitation medium, there is first a phase separation (into a continuous phase rich in solvent, in which the polymer is dissolved, and into a disperse phase, consisting of droplets rich in non-solvent) and then there is a phase inversion (the continuous phase then becoming the phase rich in non-solvent, and the disperse phase becoming the phase rich in solvent containing the dissolved polymer) the non-solvent is initially introduced into the precipitation medium in liquid form only and in a quantity (Q?) which is not zero but is less than the quantity (Q) required to bring about the phase inversion, and is subsequently introduced into the precipitation medium at least partly in vapour form.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: December 7, 2010
    Assignee: Solvay S.A.
    Inventors: Eric Fassiau, Denis Geets
  • Patent number: 7846984
    Abstract: If an ultraviolet curing resin is colored by contamination by another substance, there have been issues regarding increased cost and the environmental burden of treating the waste solution due to an inability to recycle the resin as it is. The ultraviolet curing resin that is in a colored, uncured state is decolored in the present invention by irradiation of light having a wavelength in the vicinity of the maximum absorption wavelength of the coloring material, and then recycled. As a result, it is possible to reduce costs and contribute to the protection of the environment.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: December 7, 2010
    Assignee: Panasonic Corporation
    Inventors: Yukako Doi, Toshiyuki Aoyama
  • Patent number: 7846985
    Abstract: Methods and systems for processing waste materials and for manufacturing composite materials are disclosed herein. According to some embodiments, the heterogeneous waste includes a plastic component and a non-plastic component, and the non-plastic component includes a plurality of pieces of waste. The heterogeneous waste is heated to melt at least a portion of said plastic component and reducing a volume of said heterogeneous waste, and then mixed (e.g. by rotating a mixing chamber or by stirring) until at least some said pieces are each encapsulated by the melted plastic component. Upon cooling, the mixture optionally sets into a composite material. The presently disclosed invention does not require pre-sorting of the heterogeneous waste and is operative to process “as is” waste. Optionally, the waste is pre-sorted.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: December 7, 2010
    Assignee: Yuval Tamir
    Inventors: Amit Azulay, Yuval Tamir
  • Patent number: 7846225
    Abstract: The present invention provides a process which utilizes biodiesel and other high boiling esters containing short alkyl groups to produce liquid fuels from fluff. The fluff is added to a solvent having a predetermined cycle starting solvent volume. An energy source is introduced into the solvent for a predetermined time at a predetermined temperature and pressure to form a product. The energy source is removed and the product is cooled to a predetermined temperature to produce the fuel. The invention also encompasses the fuel formed by the process described.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: December 7, 2010
    Assignee: Recarbon Corp.
    Inventors: Howard Gonchar, Roman Bielski, Donald Keiper, Ken Battle
  • Patent number: 7842106
    Abstract: The present invention provides an economic process which utilizes biodiesel and other high boiling esters containing short alkyl groups to produce liquid fuels from polymeric materials such as, for example, used tires. In a first embodiment, polymeric material is dissolved/suspended/dispersed in biodiesel upon heating to form a product containing between about 10% and about 35% by weight of polymeric material. At least some of the biodiesel is recovered and reused to dissolve/suspend/disperse additional polymeric material to form additional product. After a predetermined number of cycles, the accumulated product is used as a fuel. In a second embodiment, polymeric material is dissolved/suspended/dispersed upon heating in biodiesel to form a mixture containing between about 30% and about 90% by weight of the polymeric material to be used as heavy fuel oil to be burned as is or bulk refined. The present invention also encompasses the fuel formed by the processes described.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: November 30, 2010
    Assignee: Recarbon Corp.
    Inventors: Howard Gonchar, Roman Bielski, Ken Battle, Donald Keiper
  • Patent number: 7820728
    Abstract: The present invention pertains to carpet and methods of making and recycling carpet. In one aspect, the carpet includes: a primary backing which has a face and a back surface; a plurality of fibers attached to the primary backing and extending from the face of the primary backing and exposed at the back surface of the primary backing; an adhesive composition backing; and an optional secondary backing adjacent to the adhesive backing. The method of making carpet includes extrusion coating the adhesive composition onto the back surface of a primary backing to form the adhesive composition backing. The method of recycling carpet can recover one or more polymeric carpet components.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: October 26, 2010
    Assignee: Columbia Insurance Company
    Inventors: Jeffrey Wright, Kellie Ballew
  • Publication number: 20100268192
    Abstract: Medical tubing (T), such as a guidewire, a stent, a catheter or a hollow needle, made of a kinked rigid-rod polyarylene exhibiting a outstanding characteristics including high torqueability, high pushability and high flexibility and which can be easily thin-wall extruded under especially harsh conditions.
    Type: Application
    Filed: April 21, 2010
    Publication date: October 21, 2010
    Applicant: SOLVAY ADVANCED POLYMERS, L.L.C.
    Inventors: Mohammad Jamal EL-HIBRI, Brian BALENO, Nikica MALJKOVIC, Bianca Sadicoff SHEMPER, Jean-Baptiste BONNADIER, Daniel J. IRELAND, Henri N. J. MASSILLON
  • Patent number: 7812061
    Abstract: A method for manufacturing a recycled polycarbonate raw material for a flame retardant resin composition from discarded and/or recovered optical discs using a polycarbonate resin as a substrate material, and includes (a) a step to identify if 2,2-bis(4-hydroxyphenyl)propane as a divalent phenol of the polycarbonate resin raw material is polymerized as the sole raw material in the polycarbonate resin as the substrate material of the discarded and/or recovered optical discs and (b) a step to remove impurities by a chemical treatment by separating only the discarded and/or recovered optical discs, wherein the polycarbonate resin is identified as polymerized by using 2,2-bis(4-hydroxyphenyl)propane as the sole raw material.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 12, 2010
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventor: Toshio Isozaki
  • Patent number: 7807117
    Abstract: The present invention addresses a problem with conventional techniques for recycling electrical equipment that have a hardened epoxy resin and electroconductive material where a catalyst is degraded to an extent that it can no longer be reused when water is present in a dissolving system. Moisture, when present in the dissolving system for treating electrical equipment including electroconductive material of aluminum, may react with aluminum to produce an aluminate compound which is transformed into aluminum oxide (alumina) under heating, which, in turn, may cause abnormal temperature rise to melt aluminum. This may be accompanied by formation of hydrogen which can cause danger of explosion. The present invention manages moisture content in a dissolving system by drying an object to be treated with a catalyst and a solvent prior to the dissolving treatment.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: October 5, 2010
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kohei Sato, Tomohiro Kaizu
  • Patent number: 7807728
    Abstract: Disclosed is a method for recycling a recovered polycondensation polymer which comprises a process wherein a recovered polycondensation polymer is supplied in a molten state to a polymerizer having a porous plate, and then after ejecting the polycondensation polymer through pores of the porous plate, the polymerization degree of the polycondensation polymer is increased under a reduced pressure or in a reduced inert gas atmosphere while dropping the polycondensation polymer along a supporting body.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: October 5, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Hiroshi Yokoyama, Muneaki Aminaka, Ken Someya
  • Patent number: 7807727
    Abstract: The invention relates to a method for selectively separating mixed synthetic organic materials such as filled or non-filled polymers and/or copolymers that are wastes, particularly used, for recycling in order to upgrade them. These synthetic organic materials result from the destruction by crushing of automobiles and durable consumer goods that have reached the end of their serviceable lives. Said selective separation method acts by separating these materials with regard to a density threshold selected in a dense medium consisting of separating fluid liquid suspensions composed of powdery particles dispersed in an aqueous phase. These suspensions are stabilized by using a dynamic stabilizing means at a density threshold value selected for causing the selective separation of a determined fraction from the mixture of the used materials to be separated.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: October 5, 2010
    Assignee: Galloo Plastics
    Inventors: Hugues De Feraudy, Henri Seinera
  • Publication number: 20100249253
    Abstract: Method for the recycling of polyvinyl butyral based on the obtaining of recycled polyvinyl butyral (PVB) from laminated glass which is then shattered and the polyvinyl butyral (PVB) is separated. The sheet obtained is cut into pieces, then proceeding to a surface cleaning process eliminating the dirt and foreign matter, which comprises: a first polyvinyl butyral (PVB) purification stage by way of a chemical treatment by means of a reagent; a subsequent final chemical treatment stage supplementary to the first stage by means of a reagent, the purification treatment being carried out on the polyvinyl butyral (PVB) in solid state and obtaining totally purified polyvinyl butyral read to be used again in the manufacture of laminated glass.
    Type: Application
    Filed: March 27, 2008
    Publication date: September 30, 2010
    Inventors: Claudio Fernandez Acevedo, Luis Martínez De Morentín Osaba, Edurne Osés Arteta, Germán Medina Herrera, Maria Antonia Fernández Fernández
  • Patent number: 7803848
    Abstract: The invention relates to a method for selectively separating synthetic organic materials such as polymers and/or reinforced or non-reinforced copolymers in the form of wastes, in particular domestic wastes recyclable in order to be reused. Said synthetic organic materials are recuperated from broken used cars and obsolete consumer durable products. The inventive method for selective separation consists in separating materials which have an identical density threshold value and are selected from a dense medium comprising separate liquid fluid suspensions which consist of powdery disperses particles in an aqueous phase and are stabilized with respect to the density threshold value selected in such a way that a selective separation of a determined fraction of the mixture of separable used material is initiated.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: September 28, 2010
    Assignee: Galloo Plastics
    Inventors: Hugues De Feraudy, Henri Seinera
  • Patent number: 7799838
    Abstract: A composition comprising: (1) from 50 to 99 wt % of a modified, random copolyetherester containing: (i) a modified, random polybutylene terephthalate copolymer block that is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and combinations thereof; and that contains at least one residue derived from the polyethylene terephthalate component; and (ii) a polyalkylene oxide copolymer block that is derived from a polyethylene terephthalate component and polyalkylene oxide glycol, and contains polyalkylene oxide and at least one residue derived from the polyethylene terephthalate component; and (2) from 1 to 50 wt % of a polyester; wherein the copolyetherester, the polyester, and optionally any additives, are present in a total amount of 100 wt %.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: September 21, 2010
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Peter H. Vollenberg, Dhaval Shah, Kenneth F. Miller
  • Patent number: 7799835
    Abstract: The present invention provides, e.g., methods to recycle and/or reduce plastic, non-plastic, or a combination thereof, from a waste stream. The methods of the present invention include contacting the plastic waste with infrared (IR) energy at one or more frequencies and at one or more intensities, over a period of time effective to heat plastic present in the plastic waste.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: September 21, 2010
    Assignee: Next-Tec, Ltd.
    Inventors: Peter Anthony Smith, Adam J. Koffler, Philip Mark Smith
  • Patent number: 7799837
    Abstract: There are provided a bottle which has a laminate structure including a glycolic acid polymer layer showing good gas-barrier property in addition to a principal resin layer and is yet provided with excellent recyclability, and also an efficient method of recycling the bottle. More specifically, a bottle having a laminate structure including at least one layer of glycolic acid polymer in addition to a principal resin layer, is obtained. After breaking the bottle, the broken pieces are washed with alkaline water, water or acidic water to remove the glycolic acid polymer layer, thereby recovering the principal resin.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: September 21, 2010
    Assignee: Kureha Corporation
    Inventors: Kazuyuki Yamane, Ryo Kato, Hiroyuki Sato
  • Patent number: 7799836
    Abstract: The invention relates to a process for making modified polybutylene terephthalate random copolymers from a polyethylene terephthalate component. The invention relates to a three step process in which a diol component selected from the group consisting of ethylene glycol, propylene glycol, and combinations thereof reacts with a polyethylene terephthalate component under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture; and where the first molten mixture is combined with 1,4-butanediol under conditions that create a second molten mixture that is subsequently placed under subatmospheric conditions that produce the modified polybutylene terephthalate random copolymers. The invention also relates to compositions made from the process.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: September 21, 2010
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Parminder Agarwal, Kristen Cohoon, Sandeep Dhawan, Robert Russell Gallucci, Ganesh Kannan, Kenneth Frederick Miller, Deepak Ramaraju, Gomatam Raghavan Ravi, Dhaval Shah
  • Patent number: 7795319
    Abstract: A process for making a carbonous residue from scrap tires is disclosed. Tires are digested in an oil product. Steel and glass fibers are separated. A product enhancing additive comprising halogen based organic or inorganic compounds is added. The resulting carbonaceous material is then cured to create the final product. The produced carbonous residue is well suited for capture of mercury. The present invention has the benefits of providing a use for scrap tires that would otherwise require disposal in a landfill, and also produces a product useful for capturing a harmful element, thereby providing multiple environmental and economic benefits.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: September 14, 2010
    Assignee: Senergy LLC
    Inventors: Alfred G. Comolli, David L. Tanner
  • Patent number: 7795320
    Abstract: The invention relates to a composition comprising a modified, random copolyetherester containing a modified, random polybutylene terephthalate copolymer block that is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and combinations thereof; and contains at least one residue derived from the polyethylene terephthalate component; and a polyalkylene oxide copolymer block that is derived from a polyethylene terephthalate component and polyalkylene oxide glycol, and contains polyalkylene oxide and at least one residue derived from the polyethylene terephthalate component.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: September 14, 2010
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Michael Determan, Ganesh Kannan, Kenneth Frederick Miller, Dhaval Shah
  • Patent number: 7795329
    Abstract: Modular plastic structural composites having a web section disposed along a horizontal axis and at least one flange section disposed along a horizontal axis parallel thereto and integrally molded to engage the top or bottom surface of the web section, wherein said composite is formed from a mixture of (A) high density polyolefin and (B) a thermoplastic-coated fiber material, polystyrene, or a combination thereof. Composites molded in the form of I-Beams and bridges constructed therefrom are also disclosed.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: September 14, 2010
    Assignee: Rutgers, the State University of New Jersey
    Inventors: Thomas Nosker, Richard Renfree, Maryann Renfree, legal representative, James Kerstein, Louis Simon
  • Patent number: 7790777
    Abstract: Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent fluid, whereby the precipitation takes place in a precipitation medium comprising two dispersants of which one [dispersant(I)] has a greater affinity for the non-solvent and the other [dispersant (II)] has a greater affinity for the solvent.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: September 7, 2010
    Assignee: Solvay S.A.
    Inventors: Eric Fassiau, Denis Geets
  • Publication number: 20100216902
    Abstract: The invention relates to a method for the pretreatment, reprocessing or recycling of thermoplastic material, wherein the plastic material to be treated is heated in at least one receptacle or reactor while undergoing constant mixing or movement and/or comminution at a temperature below the melting temperature of the plastic material, and as a result is at the same time crystallized, dried and/or purified, wherein at least one rotatable comminuting or mixing tool, with working edges that act on the material with a comminuting and/or mixing effect, is used for the mixing and/or heating of the plastic material, the heating taking place in particular by applying mechanical energy.
    Type: Application
    Filed: November 13, 2007
    Publication date: August 26, 2010
    Applicant: EREMA ENGINEERING RECYCLING MASCHINEN UND ANLAGEN GESELLSCHAFT M.B.H. FREINDORF UNTERFELDSTRASSE 3
    Inventors: Gerhard Wendelin, Klaus Feichtinger, Manfred Hackl
  • Patent number: 7772293
    Abstract: An improved process for the hydrolysis of nylon polymer is herein disclosed using ionic liquids and optionally one equivalent of sulfuric acid per amide residue of the polymer. The process provides for a simplified means for separation of the hydrolyzed polyamide constituent monomers.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: August 10, 2010
    Assignee: Invista North America S.A.R.L.
    Inventors: Keith Whiston, Stewart Forsyth, Kenneth R. Seddon
  • Patent number: 7750057
    Abstract: There is provided a method for obtaining an aqueous solution of an alkali metal salt of an aromatic dihydroxy compound by decomposing a waste aromatic polycarbonate by an alkali metal hydroxide aqueous solution. The method comprises (1) a dissolution step of dissolving a waste aromatic polycarbonate in a chlorinated hydrocarbon solvent, (2) a decomposition step of adding an alkali metal hydroxide aqueous solution to this solution to decompose the aromatic polycarbonate, (3) a re-dissolution step of adding water to this decomposed solution to dissolve a solid, (4) a two phase formation step of leaving the treated solution obtained in the step (3) to stand to form an organic solvent phase (organic phase) and an aqueous solution phase (aqueous phase), and (5) a separation/collection step of separating the aqueous phase from the organic solvent phase and collecting the aqueous phase.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: July 6, 2010
    Assignee: Teijin Chemicals, Ltd.
    Inventor: Kazuyoshi Ogasawara
  • Patent number: 7745503
    Abstract: The invention relates to the use of dialkyl carbonates as solvents for expanded polystyrene and to a new process for the recycling of expanded polystyrene. Said process comprises the volume reduction of expanded polystyrene by dissolution with a dialkyl carbonate, or a blend of dialkyl carbonates, the removal of the insoluble components by filtration, the selective precipitation of polystyrene with a non-solvent or a blend of non-solvents, the separation, drying and extrusion of the precipitated polystyrene. This process allows the recovery of pure polystyrene without altering its properties.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: June 29, 2010
    Assignee: Polimeri Europa S.p.A.
    Inventors: Marcello Notari, Franco Rivetti
  • Patent number: 7737191
    Abstract: A process and resulting product is provided in which vulcanized rubber crumb has selected chemical bonds broken and sulphur removal by biotreatment with hydrophobic bacteria, such as mycolic acid containing actinomycete bacteria of ‘mycolata’, without significant degradation of the hydrocarbon polymer. The products obtained from the use of these bacteria may be processed alone or in blends with virgin rubber and revulcanized to yield products of much higher quality than conventional reclaimed rubber materials.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: June 15, 2010
    Assignee: Recyclatech Group Limited
    Inventors: Nicholas Christofi, John Geoffrey, David Edward
  • Publication number: 20100144911
    Abstract: A method of depolymerizing formulated rubbers and polymer solids is described. The method utilizes a solvent at or above the solvent's critical pressure and critical temperature with a low ratio of solvent to the solid material. The resulting depolymerized material in either substantially solid or highly viscous liquid form can be repolymerized with the addition of more monomer.
    Type: Application
    Filed: November 24, 2009
    Publication date: June 10, 2010
    Inventors: William A. Farone, Tracy Palmer
  • Patent number: 7732503
    Abstract: The conventional techniques for recycling an electrical equipment including a hardened epoxy resin and electroconductive material has involved conventional problems that a catalyst is degraded to an extent that it can be no longer reused when a water is contained in a dissolving system. Moreover, moisture, when present in the dissolving system for treating an electrical equipment including an electroconductive material of aluminum, may react with aluminum to produce an aluminate compound which is transformed into aluminum oxide (alumina) under heating, which, in turn, may cause abnormal temperature rise to melt aluminum. This may be accompanied by formation of hydrogen which can cause danger of explosion. The present invention manages moisture content in the dissolving system by drying an object to be treated, a catalyst and a solvent prior to the dissolving treatment.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: June 8, 2010
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kohei Sato, Tomohiro Kaizu
  • Patent number: 7728047
    Abstract: The invention relates to an enhanced process for the recycling of expanded polystyrene. Said process essentially comprises the reduction in volume of expanded polystyrene by means of dissolution in a solvent, separation of the insoluble components, selective precipitation of the polystyrene with an anti-solvent, separation, drying and extrusion of the precipitated polystyrene, recovery by distillation and recycling of the solvent. The process is characterized in that the anti-solvent is a butanol selected form n-butanol, iso-butanol or sec-butanol and the solvent is dimethyl carbonate, alone or in a mixture containing up to 25% by weight of butanol.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: June 1, 2010
    Assignee: Polimeri Europa S.p.A.
    Inventors: Marcello Notari, Franco Rivetti, Maurizio Ghirardini, Sergio Lombardini
  • Patent number: 7723460
    Abstract: It is possible to provide a shape-memory molded product having excellent shape-memory properties and recycling efficiency by using a shape-memory resin having a glass transition temperature (Tg) within the range of 40° C. to 200° C. and a dissociation temperature (Td) of a thermo-reversible reaction within the range of 50° C. to 300° C. and satisfying the relationship: Tg+10° C.?Td, wherein the resin is deformed at a temperature of Tg to less than Td, and cross-linked through a thermo-reversible reaction in which a covalent bond is formed by cooling and dissociated by heating.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: May 25, 2010
    Assignee: NEC Corporation
    Inventors: Midori Shimura, Kazuhiko Inoue, Masatoshi Iji
  • Patent number: 7713502
    Abstract: The invention relates to a process for recycling fuel cell components containing fluorine-containing and precious metal-containing constituents: in this process, the fluorine-containing constituents are separated off from the precious metal-containing constituents by treatment with a medium present in the supercritical state. Preference is given to using water as supercritical medium. After the fluorine-containing constituents have been separated off, the precious metal-containing residues can be recovered in a recycling process without harmful fluorine or hydrogen fluoride emissions. The fluorine-containing constituents can likewise be recovered. The process is used in the recovery of precious metals and/or fluorine-containing constituents from membrane fuel cells, electrolysis cells, batteries, sensors and other electrochemical devices.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: May 11, 2010
    Assignee: Umicore AG & Co. KG
    Inventors: Joachim Koehler, Ralf Zuber, Matthias Binder, Volker Baenisch, Marco Lopez
  • Publication number: 20100099781
    Abstract: A process is described for recycling superabsorbent polymer fines into a process that includes treating the superabsorbent polymer fines with caustic and a polymerization step for making the superabsorbent polymer gel. The process requires treating the superabsorbent polymer fines with a caustic, followed by mixture with polymerizable monomer solution, and polymerizing the mixture of the superabsorbent polymer fines and monomer to form the aqueous fluid absorbent polymer. In the process, the fines are incorporated into the new polymer gel and become indistinguishable there from. The gel may then be comminuted into a particulate dried and then separated into a portion having a desired minimum particle size in a fines portion having less than the desired size. The particulate may then be coated with a surface crosslinking agent and surface additives and heated for surface conversion.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Inventors: Gonglu TIAN, Scott J. Smith, Janet Pate-Linton
  • Patent number: 7696255
    Abstract: Process for recycling soluble or dispersible plastics from a waste product containing plastics by treatment with an organic solvent, concentrating the plastics solution thus obtained to more than 40 wt % of plastics, preconditioning the concentrated plastics solution to a pressure of at least 2 bar using a first pump and a temperature of 1-10° C. below the boiling temperature of the solvent at that pressure, bringing this preconditioned concentrated plastics solution above the critical point of the plastics solution using a high-pressure pump and a high-pressure heat exchanger, spraying the concentrated plastics solution above the critical point to recover the plastics through evaporation of the organic solvent, and recovery of the organic solvent. The process has advantages over known processes in that higher concentrations of plastics can be processed, without the danger of cavitations, and the need for solvent and energy can be reduced.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: April 13, 2010
    Assignee: Wietek Holding GmbH
    Inventors: Richard Dräger, Ulrich Schurr
  • Patent number: 7696305
    Abstract: A method and apparatus for processing polystyrene. The method includes the steps: using at least one scrapped surface heat exchanger (160) to heat a solution of polystyrene dissolved in an organic solvent to provide a heated solution of polystyrene dissolved in the organic solvent, and separating the dissolved polystyrene from the organic solvent. The apparatus includes: a holding tank at least partly filled with a solution of polystyrene dissolved in an organic solvent, at least one scrapped surface heat exchanger (160), and a separator.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: April 13, 2010
    Inventor: Joseph Douglas Sanders
  • Publication number: 20100087554
    Abstract: The inventive method for recovery of tires, mainly waste tires, consists in supplying waste tires to a pyrolysis column, in exposing the tires to the action of variable magnetic field in such a way that they are heated to a temperature of rubber thermal decomposition, in removing volatile products which are formed during the rubber thermal decomposition process, in cooling solid residues of the thermal decomposition products and in removing them from the pyrolysis column, wherein the tires are previously divided into parts which are supplied to the pyrolysis column through a feed port and the tires are inductively heated by means of a magnetic field, the frequency of which ranges from 1 to 1000 kHz. A device for carrying out said method is also disclosed.
    Type: Application
    Filed: December 11, 2007
    Publication date: April 8, 2010
    Inventors: Gregory Abramovich Berezin, Alexander Arkadievich Teplitsky, Artem Valeriyovich Madatov
  • Patent number: 7659320
    Abstract: The invention relates to a method for recovering nylon from a nylon-containing material by contacting the nylon-containing material with an alkanol-containing solvent at elevated temperature and at a pressure higher than the equilibrium pressure of the alkanol-containing solvent at the elevated temperature, thereby dissolving the nylon in the alkanol-containing solvent, removing the alkanol-containing solvent containing dissolved nylon from any undissolved solids, and decreasing the temperature of the alkanol-containing solvent containing dissolved nylon to precipitate the dissolved nylon.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: February 9, 2010
    Assignee: Interface, Inc.
    Inventor: Raymond A. Berard
  • Publication number: 20100028499
    Abstract: A container (22) includes a shell (24) made from a polymer, for example PET, and incorporating a catalyst, for example a palladium catalyst. A closure (40) incorporates a plug which includes a source of hydrogen, for example a hydride. In use, with container (22) including a beverage and closure (40) in position, the headspace in the container will be saturated with water vapor. This vapor contacts the hydride associated with plug (42) and as a result the hydride produces molecular hydrogen which migrates into the polymer matrix of shell (24) and combines with oxygen which may have entered the container through its permeable walls. A reaction between the hydrogen and oxygen takes place, catalysed by the catalyst, and water is produced. Thus, oxygen which may ingress the container is scavenged and the contents of the container are protected from oxidation.
    Type: Application
    Filed: January 24, 2008
    Publication date: February 4, 2010
    Inventors: Mark Rule, Ronald J. Valus, Steven Burgess Tattum
  • Publication number: 20100016456
    Abstract: The present invention provides methods of making composite materials comprising combining particles of crosslinked rubber with coagulated aqueous polymer dispersions to form a mixture in aqueous dispersion, and subjecting the aqueous dispersion mixture to solid state shear pulverization to form materials that can be processed as thermoplastics at crosslinked rubber concentrations of from 10 to as high as 95 wt. %, based on the total solids of the material. The method may further comprise kneading the pulverized product to form useful articles, such as roofing membranes and shoe soles.
    Type: Application
    Filed: July 10, 2009
    Publication date: January 21, 2010
    Inventors: Carlos A. Cruz, Willie Lau, Joseph M. Rokowski, Qi Wang
  • Publication number: 20100013116
    Abstract: Removing PCBs from recycled plastic materials. A reactor can volatilize the PCBs from interior portions of the plastic materials under pressure conditions below atmospheric pressure and temperatures sufficient to melt the plastic material. The reactor typically includes agitation that exposes the plastic material to the atmosphere within the reactor to promote the volatilization of the PCBs.
    Type: Application
    Filed: July 21, 2009
    Publication date: January 21, 2010
    Inventors: Peter C. Blyth, David L. Bangs
  • Publication number: 20090326082
    Abstract: The present invention relates to compositions and methods for producing articles from recycled materials. In one embodiment, a recycled polymeric matrix containing a super adsorbant polymer is thermally and/or chemically treated to produce a modified polymeric matrix. In a preferred embodiment, a modified polymeric matrix is subsequently melt processed with a filler. Articles produced from the modified polymeric matrix and the composites of this invention are useful as building materials, automotive components and consumer goods.
    Type: Application
    Filed: August 27, 2007
    Publication date: December 31, 2009
    Inventor: Jeffrey Jacob Cernohous