With Selective Differentiation Patents (Class 209/46)
  • Patent number: 8969425
    Abstract: The present invention relates to a process for separating two or more components of a plastic material for the purposes of recycling, with particular application to purifying poly(ethylene terephthalate) (PET) during recycling procedures. The process comprises contacting a quantity of the plastic material with one or more discrete pre-heated particles.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: March 3, 2015
    Assignee: Nextek Limited
    Inventor: Edward Kosior
  • Patent number: 8434623
    Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material and at least one second material, which comprises the following steps: (A) contacting of the mixture comprising the at least one first material and at least one second material with at least one selective hydrophobicizing agent in the presence of a suspension medium so that an adduct is formed from the at least one hydrophobicizing agent and the at least one first material but not with the at least one second material, (B) contacting of the adduct from step (A) with at least one magnetic particle which is functionalized on the surface with at least one polymeric compound having a transition temperature LCST (lower critical solution temperature) at a temperature at which the polymeric compound has hydrophobic character so that the adduct from step (A) and the at least one functionalized magnetic particle agglomerate, (C) if appropriate addition of further suspensio
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: May 7, 2013
    Assignees: BASF SE, Siemens AG
    Inventors: Imme Domke, Alexej Michailovski, Norbert Mronga, Hartmut Hibst, Juergen Tropsch, Susanne Stutz
  • Patent number: 6382427
    Abstract: An apparatus for separating hulled and unhulled pistachios includes a rotating drum and a conveyor for depositing pistachios onto the drum. Rotation of the drum frictionally separates hulled and unhulled pistachios.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: May 7, 2002
    Inventor: Mohammad Nakhei-Nejad
  • Patent number: 5660282
    Abstract: A method of separating solid waste materials, in the form of dried particles of substantially uniform size, into constituent materials on the basis of density, with primary stage processing utilizing one or more fluidized bed and cyclonic separator assemblies to separate materials on the basis of density, is provided by the invention. Secondary stage processing utilizing combinations of vibratory conveyors and melt separation assemblies, is also provided. As the waste materials move through the separator assemblies the initial stream is further refined into a plurality of streams of increasingly specific densities as a result of air flow separation of lighter particles from heavier particles in each assembly. Further refined separation may be achieved through the use of vibratory conveyors and melt separation.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: August 26, 1997
    Assignee: Evergreen Global Resources, Inc.
    Inventors: Tobin Djerf, Gwen Damico
  • Patent number: 5590789
    Abstract: Thermoplastic articles are removed from a mixed waste stream and are sorted by heating the articles along the path of the waste stream to different softening temperatures of the different types of articles before the articles contact the separating bodies which have surface formations that are forced into the softened zones of the thermoplastic article so that the articles are impaled upon the body. The articles are then removed. The force with which the softened articles are impaled is obtained by a support or counterforce member juxtaposed with the separating bodies.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: January 7, 1997
    Inventors: Urban Stricker, Martin Siebert
  • Patent number: 5303826
    Abstract: A method and an apparatus for separating of different plastic products, which plastic products are comminuted, purified, and dried in a conventional way. The dry particles are fed to a heated, movable support base. Plastic particles, having a lower softening point, adhere to the support base, and particles having, a higher softening point, flow freely over the particles adhering to the moving support base and can be separated. After separation of these particles, the adhering particles are scraped from the steel belt.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: April 19, 1994
    Assignee: REFAKT Anlagenbau GmbH
    Inventor: Heinrich Buzga
  • Patent number: 5066388
    Abstract: Process and apparatus for disengaging organic, bituminous material from pulverized bituminous ores and for recovering a concentrated mixture of the bituminous material and water. Wherein the apparatus comprises a pulverizer to pulverize the ores to be processed to particles not larger than 1/4 inch in size and inner and outer process vessels which are preferably combined into a unitary assembly and wherein the process comprises a combination of mechanical and hot water disengagement of the organic, bituminous materials from the mineral ore solids, i.e.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: November 19, 1991
    Inventor: Lena Ross
  • Patent number: 4975182
    Abstract: The invention consists of forming an aqueous slurry of water and particles of ore carrying both metals and/or minerals which are passed at relatively high speed along an electrically isolated path in contact with electrically insulating materials and in the presence of air. This generates a positive electrostatic charge in the water droplets and enclosed particles and a negative charge in the electrically insulating materials through which they are being driven. The water droplets and hence the particles become differentially charged so that when they pass over an oppositely charged negative field, they are driven into the lower oppositely charged field body by the strong force of electrical attraction and the relatively weaker force of gravity. Should the negative collector contain an amalgamating material such as mercury and the ore, as an example contain gold, electrons are exchanged providing instant amalgamation of the surface of the gold.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: December 4, 1990
    Assignee: DCRS (Barbados) Ltd.
    Inventor: Robert R. Barefoot
  • Patent number: 4892647
    Abstract: A system for segregating trash into discrete fractions including a separator assemblage consisting of a staggered multiple-tiered heated belt system or separating thermoplastic materials from other substances. Each heated belt unit is modular and seated in a frame. Each unit comprises a continuous belt reeved about a driven and a driving rotor disposed in space relationship to each other and having a unique heating element disposed therein.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: January 9, 1990
    Inventors: Franklin D. Liddle, Ottavio A. Tassielli
  • Patent number: 4557826
    Abstract: According to the method the stock suspension is moved across a mass force field due to gravity or centrifugal acceleration in the form of stock stream or current and contacts a pick-up surface moved in conjunction with the stock stream and at substantially the same velocity. The apparatus may comprise a housing in which a turbulent or vortex flow is generated and containing a rotor therein which possesses the pick-up surface. Further embodiments have a guiding wire or screen which is moved along a pick-up cylinder or is trained around the same and upon which there is formed a layer of the stock suspension by using a stock supply device. A band, for example a wire band, may be provided to pick-up the contaminants.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: December 10, 1985
    Assignee: Escher Wyss GmbH
    Inventors: Wolfgang Flucher, Wolfgang Siewert
  • Patent number: 4543733
    Abstract: In a magnetically stabilized fluidized bed in which the bed particles continuously move transverse to the flow of the fluidizing fluid, the bed particles have increased fluidity when the bed is operated at or substantially near the locus of transition between the bubbling and stabilized regimes of said bed. More specifically, the particulate bed comprising a transverse flow magnetically stabilized fluidized bed process has greater fluidity when the bed is operated such that the ratio of the difference between the transition velocity and the operating velocity to the difference between the transition velocity and the normal minimum fluidization velocity ranges between -0.1 and +0.5. The increased fluidity facilitates the movement of solids within a vessel as well as the transfer of solids to other vessels.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: October 1, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Jeffrey H. Siegell, Costas A. Coulaloglou
  • Patent number: 4526679
    Abstract: A mixture of low melting particles and high melting particles is heated to a temperature above the melting point of the low melting particles and below the melting point of the high melting particles thereby melting the low melting particles and forming a bond between the low melting particles and the high melting particles which bond is strengthened on cooling, the resulting agglomerate containing the low melting particles being separated from the unbonded high melting particles.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: July 2, 1985
    Assignee: Texaco Inc.
    Inventor: Ronald L. Litzinger
  • Patent number: 4269699
    Abstract: The sulfide surfaces of finely-divided impure iron sulfide-containing minerals such as pyritic ores or coals are rendered hydrophilic by the adsorption of conditioned, inorganic sulfide-oxidizing bacteria. This adsorption of conditioned bacteria occurs in a short time to render the surfaces hydrophilic and allows these altered sulfide particles to be separated from hydrophobic solids by flotation, oil-agglomeration or the like. This bioadsorption process has particular applicability to pyritic coal beneficiation.
    Type: Grant
    Filed: October 23, 1979
    Date of Patent: May 26, 1981
    Assignee: Canadian Patents & Dev. Ltd.
    Inventors: Ronald G. L. McCready, Richard D. Coleman, Charles E. Capes, Alan G. Kempton, Nayera A. M. Moneib
  • Patent number: 4140344
    Abstract: Marine sediment contains organic matter which can be extracted to provide a source of energy, by extracting the organic matter from the marine sediment when in the form of a slurry, and separating the organic matter from the extracted material.
    Type: Grant
    Filed: August 30, 1977
    Date of Patent: February 20, 1979
    Inventor: Claude M. D. M. DE Turville
  • Patent number: 4013505
    Abstract: A method for deinking printed wastepapers in a system of separators through which printed wastepapers, previously impregnated with surface-active agents and alkalis, and repulped in the presence of an organic hydrocarbon compound and high-adsorptive flakes obtained by precipitating solutions of metal soaps of fatty or bituminous acids with solutions of salts of alkaline earths, are forced. The adsorptive flakes containing printing ink are separated from the repulped paper stock by latent vortex action.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: March 22, 1977
    Assignee: Vyzkumny ustav papieru a celulosy
    Inventors: Cestmir Balcar, Antonin Kostka, Jaroslav Havranek, Marcel Lalak