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公开(公告)号：US4118187A
公开(公告)日：1978-10-03
申请号：US749149
申请日：1976-12-09
CPC分类号： C08J11/08 , D06P5/137 , C08J2367/02 , Y02W30/701 , Y10S264/913
摘要： Polyester polymer is recovered from mixed collections of fibers in the form of fibers, filaments, yarns, or fabrics (including dyed or undyed fibers other than polyester fibers as well as dyed polyester fibers) and used in the production of new undyed fibers, by solvent stripping the dye from the polyester fibers without dissolving the fibers, and with additional solvent, selectively dissolving the polyester fibers in successive but functionally integrated steps; separating the dissolved fibers from an undissolved impurities and thereafter separating the residual dye-stripping solvent and the additional solvent from the polyester component without precipitiating the polyester component from solution by evaporating the solvent, preferably by atmospheric boiling and vacuum finishing of the molten solution.
摘要翻译： 从纤维，细丝，纱线或织物（包括除聚酯纤维以外的染色或未染色纤维以及染色的聚酯纤维）的纤维的混合收集的纤维中回收聚酯聚合物，并用于通过溶剂生产新的未染色的纤维 在不溶解纤维的情况下从聚酯纤维上剥离染料，并用另外的溶剂，选择性地将聚酯纤维溶解在连续但功能上一体化的步骤中; 将溶解的纤维与未溶解的杂质分离，然后通过蒸发溶剂，优选通过大气沸腾和熔融溶液的真空整理，从聚酯组分中分离残留的染料剥离溶剂和附加溶剂而不从溶液中沉淀出聚酯组分。
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公开(公告)号：US4105593A
公开(公告)日：1978-08-08
申请号：US814129
申请日：1977-07-08
申请人： Stavros C. Stavrinou
发明人： Stavros C. Stavrinou
CPC分类号： B29B17/0412 , C08J11/08 , B29B2017/0476 , B29L2031/732 , Y02W30/521 , Y02W30/625 , Y02W30/701
摘要： Scrap sheet floor covering is recovered for reuse through the use of a Henschel mixer. The mixer grinds the prediced scrap in the presence of a plasticizer to separate the asbestos containing backing material from the vinyl layer. The resultant blended mix can then be used as a raw material in the manufacture of fiber-filled vinyl tile.
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73.发明授权Reclamation processing of polyvinyl chloride-scrap materials and products produced thereby 失效聚氯乙烯切割材料的回收处理及其生产的产品
公开(公告)号：US4038219A
公开(公告)日：1977-07-26
申请号：US670470
申请日：1976-03-25
CPC分类号： C08J11/08 , C08J2327/06 , Y02W30/701
摘要： Recompoundable polyvinyl chloride suitable for reuse, for example, in cable and wire production is recovered from a scrap material which includes plasticized polyvinyl chloride. A charge of plasticized polyvinyl chloride scrap material is treated with a solvent to form a solvent mixture with one component thereof being a solvent solution of dissolved vinyl chloride polymer and plasticizers. The mixture is heated and agitated and scrap metal and other gross solids, if present, are removed. Then the solvent mixture is treated with an acid which advantageously causes a flocculation of suspended insolubles such as pigments and fillers. Except when using cyclohexanone as the solvent, the treatment with the acid must be accomplished, unexpectedly, in the presence of an additional flocculating agent. Suitable floccuating agents include liquid monomeric esters, which are effective only for cable and wire scrap, polystyrene, polymethyl methacrylate, poly (vinyl isobutyl ether), polyvinyl acetate and ethylene vinyl acetate, the latter acetate being effective only for scrap plastic such as extruder purgings.
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公开(公告)号：US4003880A
公开(公告)日：1977-01-18
申请号：US578592
申请日：1975-05-19
CPC分类号： C08J11/08 , D06P5/137 , C08J2367/02 , Y02W30/701 , Y10S264/913
摘要： Polyester polymer is recovered from mixed collections of fibers in the form of fibers, filaments, or fabrics (including dyed or undyed fibers other than polyester fibers as well as dyed polyester fibers) and used in the production of new undyed fibers, films and other polymer products through the process of stripping the dye from the polyester fibers by contacting the fabrics with a dye stripping solvent for polyester polymer which is preferably not a solvent for fibers other than polyester fibers at a temperature below which the polyester fibers dissolve and above which the crystalline lattice of the polyester fibers swell so as to release the dye; then removing essentially all of the dye-containing dye-stripping solvent which is not absorbed by the fibers; then contacting the solvent-laden fibers (which may contain residual dye) with sufficient additional solvent under selective dissolution conditions for polyester fibers; then removing the undissolved fibers and any other undissolved impurities from the solution; thereafter precipitating the polyester out of; and, separating the polyester from the solution.
摘要翻译： 从纤维，长丝或织物（包括除聚酯纤维以外的染色或未染色的纤维以及染色的聚酯纤维）的纤维的混合收集的纤维中回收聚酯聚合物，并用于生产新的未染色的纤维，膜和其它聚合物 通过使聚酯纤维与织物与用于聚酯聚合物的染料剥离溶剂接触来脱除染料的过程的产物，聚酯聚合物优选不是聚酯纤维以外的纤维的溶剂，低于聚酯纤维溶解的温度，并且其上的结晶 聚酯纤维的晶格膨胀以释放染料; 然后基本上除去未被纤维吸收的含染料的染料剥离溶剂; 然后在聚酯纤维的选择性溶解条件下将含溶剂的纤维（可能含有残留染料）与足够的其它溶剂接触; 然后从溶液中除去未溶解的纤维和任何其它未溶解的杂质; 然后将聚酯脱出; 并将聚酯与溶液分离。
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75.发明授权
公开(公告)号：US3965149A
公开(公告)日：1976-06-22
申请号：US520760
申请日：1974-11-04
申请人： Lee R. Mahoney
发明人： Lee R. Mahoney
CPC分类号： C08J11/08 , C07C67/333 , C08J2333/12 , Y02W30/701
摘要： A method for recovering methyl methacrylate from a mixture of polymeric materials containing poly (methyl methacrylate) which comprises contacting the mixture with a boiling C.sub.5 - C.sub.8 alkane, separating an insoluble residue containing poly (methyl methacrylate) from the alkane and its extract, extracting poly (methyl methacrylate) from such insoluble residue with boiling acetone, separating the poly (methyl methacrylate) from the acetone, and recovering the methyl methacrylate monomer from such poly (methyl methacrylate) by pyrolysis. In a preferred embodiment, the poly (methyl methacrylate) containing solid obtained after the acetone extraction is compressed under elevated temperatures and pressures prior to pyrolysis. The method can be stopped prior to the pyrolysis step when it is desired to recover only the poly (methyl methacrylate).
摘要翻译： 从含有聚（甲基丙烯酸甲酯）的聚合材料的混合物中回收甲基丙烯酸甲酯的方法，该方法包括使该混合物与沸腾的C 5 -C 8烷烃接触，从烷烃及其提取物中分离出含有聚（甲基丙烯酸甲酯）的不溶性残余物，提取聚 （甲基丙烯酸甲酯）由沸腾的丙酮从不溶性残留物中分离，从丙酮中分离聚（甲基丙烯酸甲酯），并通过热解从这种聚（甲基丙烯酸甲酯）中回收甲基丙烯酸甲酯单体。 在优选的实施方案中，在丙酮萃取之后获得的含有聚甲基丙烯酸甲酯的固体在高温和高压下被压缩，然后进行热解。 当需要仅回收聚（甲基丙烯酸甲酯）时，可以在热解步骤之前停止该方法。
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公开(公告)号：US3873314A
公开(公告)日：1975-03-25
申请号：US30453772
申请日：1972-11-07
申请人： HORIZONS INC
发明人： WOO JAMES T K , GLOWE DONALD E , THORNTON J SCOTT
CPC分类号： G03C11/24 , C08J11/08 , Y02P20/582 , Y02W30/701
摘要： Polymers containing polyvinylidene halides are generally used as a subbing or anchoring layer between a polyester film base and a gelatin layer containing halides or other silver compounds. It has been found that the silver and silver compound containing gelatin layer can be separated cleanly from the polyester base with attendant removal of the polyvinylidene halide containing polymer from both the gelatin fractions and the polyester fraction by suitable treatment of the photographic film (whether exposed or unexposed) in polar aprotic solvents; somewhat less polar solvents comprising cyclic compounds taken from the class of aliphatic and aromatic hydrocarbons, ethers, sulfides, and ketones; and mixtures of polar aprotic solvents such as sulfoxides or amides in combination with the cyclic solvents as cosolvents. These solvents dissolve the polyvinylidene containing polymer while not affecting materially either the polyester base or the silver compound or silver metal containing gelatin layer. Of this group of solvents the polar aprotic solvents are the preferred species; mixtures of polar aprotic solvents and polar cyclic compounds being preferred next; and cyclic organic compounds which are less polar being the least preferred in view of the relatively high temperature required for suitable action. The preferred solvents are effective at room temperature, at elevated temperature below the boiling point of the solvent and in the vapor phase above the boiling point of the solvent.
摘要翻译： 含有聚偏二氯乙烯的聚合物通常用作聚酯膜基材和含有卤化物或其它银化合物的明胶层之间的底层或锚定层。 已经发现，含银明胶层的银和银化合物可以从聚酯基材干净地分离出来，通过适当地处理照相胶片（无论是曝光的还是暴露的或不可见的），从明胶部分和聚酯部分中随着去除含聚偏二卤乙烯的聚合物 未曝光）在极性非质子溶剂中; 包含从脂族和芳族烃类，醚类，硫化物和酮类中获得的环状化合物的极少量极性溶剂; 以及极性非质子溶剂如亚砜或酰胺与环状溶剂的组合作为助溶剂的混合物。 这些溶剂溶解含聚偏二烯聚合物，同时不影响聚酯基或银化合物或含银金属明胶层的物质。 在这组溶剂中，极性非质子溶剂是优选的物质; 接下来优选极性非质子溶剂和极性环状化合物的混合物; 考虑到合适的作用所需的相对较高的温度，极性较小的环状有机化合物是最不优选的。 优选的溶剂在室温下，在低于溶剂沸点的高温下和高于溶剂沸点的气相中有效。
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公开(公告)号：US3696058A
公开(公告)日：1972-10-03
申请号：US3696058D
申请日：1971-06-10
申请人： DU PONT
发明人： TETI JOHN
CPC分类号： C08J11/08 , C08J2333/20 , C08J2367/02 , C08J2377/00 , Y02W30/701
摘要： A PROCESS FOR RECOVERING SOLID SCRAP THERMOPLASTIC POLYMER SUCH AS POLYAMIDES, POLYESTERS, POLYACRYLONITRILES AND POLYACETALS BY DISSOLVING THE POLYMER IN HEXAFLUOROISOPROPANOL, FILTERING THE POLYMER SOLUTION, MIXING THE POLYMER SOLUTION WITH AN EXCESS OF WATER AT 60* TO 100* C. AND SEPARATING THE PRECIPITATED POLYMER FROM THE AQUEOUS MIXTURE.
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公开(公告)号：US3666691A
公开(公告)日：1972-05-30
申请号：US3666691D
申请日：1970-06-11
申请人： LESTER L SPILLER
发明人： SPILLER LESTER L
CPC分类号： C08J11/08 , Y02W30/701
摘要： Synthetic resins, and particularly polyvinyl chloride, coated on copper are reclaimed by pouring thereover a mixture of organic solvents containing trichlorethylene and dimethyl sulfoxide as the essential solvents. The solvent mixture is preheated to a temperature in the range of 50*-100* C. and the material being reclaimed is held in an autoclave at a pressure of at least 5 p.s.i. gauge so that the resin being reclaimed is contacted by the solvent mixture in both the liquid and vapor phases.
摘要翻译： 通过在其上浇注含有三氯乙烯和二甲基亚砜的有机溶剂的混合物作为必需溶剂，回收涂覆在铜上的合成树脂，特别是聚氯乙烯。 将溶剂混合物预热至50℃-100℃的温度，将回收的材料在至少5p.s.i的压力下保持在高压釜中。 使得回收的树脂在液相和蒸气相中都被溶剂混合物接触。
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79.发明授权Method for reclaiming commercially useful fibers and resin from scrap material 失效用于回收商业上有用的纤维和从刮擦材料树脂的方法
公开(公告)号：US3624009A
公开(公告)日：1971-11-30
申请号：US3624009D
申请日：1969-11-04
申请人： FIBER PROCESS INC
CPC分类号： C08J11/08 , Y02W30/701
摘要： Scrap fabrics supported synthetic resin are first washed with solvent under controlled heat, pressure and agitation to produce as a first product clean, dried, resin and solvent free fibers. The polymer solution extracted from the washing stage is treated in one or more stages to produce as a second product granular, clean, dried resin compound. Clean solvent is recovered for recirculation through the system.
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公开(公告)号：US3361708A
公开(公告)日：1968-01-02
申请号：US23424562
申请日：1962-10-30
申请人： UNIROYAL INC
CPC分类号： C08J11/08 , C08J2321/00 , C08K5/005 , Y02W30/701 , C08L77/00
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