Containing Hydroxyl Group Patents (Class 521/44)
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Patent number: 5475036Abstract: A process for reusing a plastic article having a plastic body and a coating layer is discloses which includes the following steps: peeling the coating layer, formed on the plastic body, away from the plastic body by using a high pressure water jet stream; and pulverizing the plastic body for reuse. Hot water may be also used. Instead of the water, it is possible to use high pressure steam.Type: GrantFiled: January 25, 1993Date of Patent: December 12, 1995Assignees: The Japan Steel Works, Ltd., Mitsui Toatsu Chemicals, Inc.Inventors: Hiroshi Hosoyama, Michiaki Yamamoto, Keigo Suehiro
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Patent number: 5464877Abstract: A method for recovering a synthetic waste material contaminated with other materials, particularly waste optical disks, wherein the loose, uncrushed waste is chemically treated by impregnating said other materials with a chemical solution which attacks these materials but is substantially neutral for the synthetic material, and mechanically treated by tumbling said waste in a sealed rotary drum to dislodge the contaminated and chemically attacked materials from said synthetic material.Type: GrantFiled: March 24, 1994Date of Patent: November 7, 1995Assignee: Helverep S.A.Inventor: Francois-Marie Franci
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Patent number: 5420166Abstract: The present invention is directed to a method for treating cross-linked (cured) filled or untilled unsaturated polyester for deriving an alcohol recycle reactant useful in the synthesis of alcohol-formed derivative products. The first step of the method is the attrition of the cured unsaturated polyester to form particulates thereof. In the next step of the process, at least a fraction of any filler or fiberglass in the cured unsaturated polyester is separated to form a cured unsaturated polyester regrind. The next step is the subjecting of the cured unsaturated polyester regrind to agitated, uncatalyzed or catalyzed glycolysis in the presence of excess glycol and, optionally, a transesterification catalyst under agitation at elevated transesterification temperature. The final step of the process is the recovery of the recycle alcohol reactant for use in the synthesis of alcohol-formed derivative products.Type: GrantFiled: September 30, 1994Date of Patent: May 30, 1995Assignee: Ashland Oil, Inc.Inventors: Timothy A. Tufts, Chung-Chieh Tsai, Stephen S. Hupp
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Patent number: 5418256Abstract: The invention pertains to a method of treating vulcanized rubber, such as scrap tires, in which the copolymer is treated with an organic solvent under supercritical conditions, such that an organic solution of several by-products is obtained. These can be conventionally fractionated to recover useful organic compounds.Type: GrantFiled: December 14, 1993Date of Patent: May 23, 1995Assignee: University of South AlabamaInventors: Jagdish C. Dhawan, Richard C. Legendre
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Patent number: 5389691Abstract: A thermal process co-recycles tires with oils to produce gases, liquids and solids. The letter consisting of glass and steel fibers and a carbonous residue which are separately segregated and collected. By using selected additives gas formation and hydrogen sulfide contents are reduced, light product oil yields and quality are maximized and the level of chlorinated substances in the oils are reduced to trace amounts. The carbonous residue makes an excellent modifier for improving performance properties of bituminous binders and bituminous mixtures and for providing added benefits to properties of Portland concrete.Type: GrantFiled: September 7, 1993Date of Patent: February 14, 1995Assignees: Univ. of Wyoming, Amoco Corp.Inventors: Chang Y. Cha, Henry Plancher, Lawrence S. Kraus
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Patent number: 5380793Abstract: This invention is a low cost styrene-soluble unsaturated polyester resin made using recycled or virgin polyethylene terephthalate. The PET is first glycolyzed using inexpensive glycols and then reacted with maleic anhydride and dicyclopentadiene, forming polyesters containing cyclopentadiene added by Diels-Alder reaction and/or norbornyl-terminated polyesters.Type: GrantFiled: July 13, 1993Date of Patent: January 10, 1995Assignee: Ashland Oil, Inc.Inventor: Timothy P. Pepper
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Patent number: 5377844Abstract: A targeted particulate, synthetic organic plastic material having normally hydrophobic surface characteristics is separated from a mixture of two or more of such plastic materials by conditioning the mixture of plastic materials in a flotation cell with a heteropolar surfactant which has a hydrophile-lipophile balance (HLB) value greater than 5 and which selectively depresses the targeted plastic material by making the surfaces thereof more hydrophilic without substantially affecting the surfaces of the other plastic material(s) and introducing gas bubbles into the resulting conditioned pulp such that the gas bubbles selectively adhere to the surfaces of the other plastic materials(s) and cause them to float. The targeted plastic material is recovered in the cell product and the other plastic material(s) is recovered in the float concentrate.Type: GrantFiled: May 10, 1993Date of Patent: January 3, 1995Assignee: Nimco Shredding Co.Inventor: Jiann-Yang Hwang
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Patent number: 5286463Abstract: A novel composition for use in reducing and recovering metals, such as silver, and for use in stripping adhesive polymer layers from various polymer bases, such as polyester, and processes for using same are provided. The composition and variations thereof can be useful in separating an adhesive polymeric layer from the film for recovery of either. The composition comprises a reducing sugar/alkaline solution that is particularly useful for recovering silver from polyester photographic film where a silver halide light-sensitive emulsion layer is adhered to the polyester film by a polymeric adhesive resin, such as resins containing copolymers of polyvinylidene chloride and polyvinyl chloride. Processes for separation and recovery are also disclosed and claimed.Type: GrantFiled: March 23, 1992Date of Patent: February 15, 1994Assignee: Partek, Inc.Inventor: John A. Schwartz, Jr.
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Patent number: 5120768Abstract: Today there is a growing demand to recycle plastics including polyethylene terephthalate. Sources of polyethylene terephthalate for recycling often contain polyvinyl chloride. It is necessary to separate polyvinyl chloride from the polyethylene terephthalate before it can be recycled into useful products. This invention reveals a process for recovering polyethylene terephthalate flakes from a recycle stream containing polyethylene terephthalate flakes and polyvinyl chloride flakes which comprises: (1) treating the recycle stream with (a) at least one inorganic base selected from the group consisting of sodium hydroxide and potassium hydroxide and (b) at least one nonionic surfactant under conditions and for a time sufficient to decrease the contact angle of the polyethylene terephthalate flakes with water below a value of 25.degree. while maintaining the contact angle of the polyvinyl chloride flakes above a value of about 45.degree.Type: GrantFiled: May 9, 1991Date of Patent: June 9, 1992Assignee: The Goodyear Tire & Rubber CompanyInventor: Edwin A. Sisson
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Patent number: 4876288Abstract: Carrier material for the immobilization of microorganisms, particularly for use in connection with microbiological conversion and/or separation of constituents from gaseous or liquid media, is disclosed. The carrier material comprises a dimensionally stable macroporous skeleton comprised of relatively coarse-grain granular material such as sinterable thermoplastic granules, and relatively fine grain microporous material, such as activated charcoal, which are bonded together. The carrier material thus comprises both macropores having a pore size of from about 10 to 200 .mu.m and micropores having a pore size of up to about 0.1 .mu.m depending upon the identity of the five grain microporous material that is used. Additional finely divided materials, such as catalytic agents or density modifying agents, may also be disposed within the macroporous skeleton. The preparation and use of the carrier material is also disclosed.Type: GrantFiled: April 7, 1987Date of Patent: October 24, 1989Assignee: Herding GmbH EntstaubungsanlagenInventors: Walter Herding, Walter Rausch
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Patent number: 4426459Abstract: A process for decomposing vulcanized rubber which comprises swelling 100 parts by weight of vulcanized rubber with 10-3000 parts by weight of an organic solution, and adding and mixing 0.1-20 parts by weight of an organic hydroperoxide (a) and of 0.001-1 mole equivalent per said (a) of at least one member (b) selected from the group consisting of copper salts, cobalt salts, and strongly alkaline compounds.Type: GrantFiled: February 18, 1981Date of Patent: January 17, 1984Assignee: Bridgestone Tire Co., Ltd.Inventors: Yoji Watabe, Hideo Takeichi, Koichi Irako
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Patent number: 4386182Abstract: Thermoplastic elastomeric compositions are prepared by mixing comminuted vulcanized rubber having a mean particle size of below 1.5 mm with a thermoplastic olefin or diolefin polymer, particular polyethylene, at a weight ratio of from 1:3 to 3:1, and with a non-ionic surfactant in an amount of 0.1 to 5 wt. % referring to the total amount of polymers. The addition of a non-ionic surfactant greatly improves the bonding between the two main components, thus yielding compositions of a very low level of porosity and improved mechanical properties, particularly superior thoughness.The compositions can be moulded or extruded to a variety of products, such as profiles, roofings, fencing posts, pallets, and also shoe sales, saddle covers, solid tires, sprinkling funnels, etc.Type: GrantFiled: July 22, 1980Date of Patent: May 31, 1983Assignee: Vredestein Icopro B.V.Inventor: Jan W. H. Zijp
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Patent number: 4324705Abstract: A process for recovering materials from scrapped film is described which comprises separating coating layers and a film base from a scrapped film having at least one coating layer on a plastic film base in a sheet or web form, wherein the improvement comprises:impregnating the coating layers of said scrapped film with a strong alkaline solution and stripping the coating layers by means of high pressure jet water to separate said coating layers from the film base before the coating layers are dissolved in or separated from the film base by said alkaline solution.Type: GrantFiled: June 12, 1980Date of Patent: April 13, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Kunihira Seto, Kyoichi Naruo