公开(公告)号：US5455346B1

公开(公告)日：1999-02-09

申请号：US35528394

申请日：1994-12-12

Applicant: BASF CORP

Inventor： KOPIETZ MICHAEL ,  KALCK ULRICH ,  JONES SIMON ,  BASSLER PETER ,  PRIESTER CLAUS-ULRICH

IPC: C07D201/12

CPC classification number: C07D201/12

公开(公告)号：US5464602A

公开(公告)日：1995-11-07

申请号：US370470

申请日：1995-01-09

Applicant: Robert J. Evans ,  Helena L. Chum

Inventor： Robert J. Evans ,  Helena L. Chum

IPC: C07D201/12 ,  C08F2/00 ,  C08J11/12 ,  C10G1/02 ,  C10G1/08 ,  C10G1/10 ,  F23G7/12

CPC classification number: C10G1/086 ,  C10G1/02 ,  C10G1/10

Abstract: A process of pyrolyzing plastic waste feed streams containing polyvinyl chloride, polyethylene terephthalate, polystyrene and polyethylene to recover polystyrene HCl and terephthalic acid comprising: heating the plastic waste feed stream to a first temperature; adding an acid or base catalyst on an oxide or carbonate support; heating the plastic waste feed stream to pyrolyze polyethylene terephthalate and polyvinyl chloride; separating terephthalic acid or HCl; heating to a second temperature to pyrolyze polystyrene; separating styrene; heating the waste feed stream to a third temperature to pyrolyze polyethylene; and separating hydrocarbons.

Abstract translation: 一种将含有聚氯乙烯，聚对苯二甲酸乙二醇酯，聚苯乙烯和聚乙烯的塑料废料进料流热解回收聚苯乙烯和对苯二甲酸的方法，包括：将塑料废料进料流加热至第一温度; 在氧化物或碳酸盐载体上加入酸或碱催化剂; 加热塑料废料进料流以热解聚对苯二甲酸乙二醇酯和聚氯乙烯; 分离对苯二甲酸或HCl; 加热至第二温度以热解聚苯乙烯; 分离苯乙烯; 将废料进料流加热至第三温度以热解聚乙烯; 和分离烃。

公开(公告)号：US5359062A

公开(公告)日：1994-10-25

申请号：US54064

申请日：1993-04-29

Applicant: Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz ,  Claus-Ulrich Priester

Inventor： Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz ,  Claus-Ulrich Priester

IPC: C07D201/12 ,  C08G69/14

CPC classification number: C07D201/12

Abstract: Caprolactam is recovered from polycaprolactam by hydrolyric cleavage of polycaprolactam with from 5 to 50 parts by weight of water per part by weight of polycaprolactam at from 200.degree. to 350.degree. C. under superatmospheric pressure to give an aqueous solution or suspension which contains monomeric caprolactam and oligomers thereof and may contain polycaprolactam and subsequent isolation of monomeric caprolactam from the aqueous solution or suspension by distillation or extraction, by a process in which the hydrolyric cleavage is carried out in the presence of an alkali metal hydroxide at a pH of from 5 to 10.

Abstract translation: 己内酰胺通过在超大气压下在200-350℃下用5至50重量份的重量比的聚己内酰胺水解裂解聚己内酰胺从聚己内酰胺中回收，得到含有单体己内酰胺和 其低聚物并且可以含有聚己内酰胺并随后通过蒸馏或萃取从水溶液或悬浮液中分离单体己内酰胺，其中水解裂解在pH为5至10的碱金属氢氧化物存在下进行 。

公开(公告)号：US5300704A

公开(公告)日：1994-04-05

申请号：US943889

申请日：1992-12-04

Applicant: Robert J. Evans ,  Helena L. Chum

Inventor： Robert J. Evans ,  Helena L. Chum

IPC: C07D201/12 ,  C08F2/00 ,  C08J11/12 ,  C10G1/02 ,  C10G1/08 ,  C10G1/10 ,  C07C37/00 ,  C07C37/52

CPC classification number: C10G1/086 ,  C10G1/02 ,  C10G1/10

Abstract: A process of using fast pyrolysis in a carrier gas to convert a plastic waste feedstream having a mixed polymeric composition in a manner such that pyrolysis of a given polymer to its high value monomeric constituent occurs prior to pyrolysis of other plastic components therein comprising: selecting a first temperature program range to cause pyrolysis of said given polymer to its high value monomeric constituent prior to a temperature range that causes pyrolysis of other plastic components; selecting a catalyst and support for treating said feed streams with said catalyst to effect acid or base catalyzed reaction pathways to maximize yield or enhance separation of said high value monomeric constituent in said temperature program range; differentially heating said feed stream at a heat rate within the first temperature program range to provide differential pyrolysis for selective recovery of optimum quantities of the high value monomeric constituent prior to pyrolysis of other plastic components; separating the high value monomeric constituents, selecting a second higher temperature range to cause pyrolysis of a different high value monomeric constituent of said plastic waste and differentially heating the feedstream at the higher temperature program range to cause pyrolysis of the different high value monomeric constituent; and separating the different high value monomeric constituent.

Abstract translation: 在载气中使用快速热解以转化具有混合聚合物组合物的塑料废料进料流的方法，使得给定聚合物在其高价值单体组分的热解之前发生在其中的其它塑料组分的热解之前，其中包括：选择 第一温度程序范围，以使所述给定的聚合物在导致其它塑料组分的热解的温度范围之前被热分解成其高价值的单体组分; 选择催化剂和用所述催化剂处理所述进料流的载体以实现酸或碱催化的反应途径，以使得所述高价值单体组分在所述温度程序范围内产率最大化或增强分离; 在第一温度程序范围内的热速率差异加热所述进料流，以提供差别热解，以在其它塑料组分的热解之前选择性回收最佳量的高价值单体组分; 分离高价值的单体成分，选择第二较高的温度范围，引起所述塑料废料的不同高价值单体成分的热分解，并在较高温度程序范围差异加热进料流，引起不同的高价值单体成分的热解; 并分离不同的高价值单体成分。

公开(公告)号：US5294707A

公开(公告)日：1994-03-15

申请号：US23030

申请日：1993-02-25

Applicant: Richard Kotek

Inventor： Richard Kotek

IPC: C08J11/14 ,  C07D201/12

CPC classification number: C07D201/12

Abstract: Polyamide is semi-continuously depolymerized by: (a) charging the polyamide to a depolymerization reactor containing 5 to 50% by weight of an unpolymerized catalyst; (b) melting the polyamide and subjecting the resultant melt to a flow of superheated steam to obtain a steam distillate; (c) separating amide monomers in the distillate from other volatiles therein; (d) when conversion to amide monomers is 40 to 90% complete, recharging polyamide to the depolymerization reactor; and (e) repeating steps (a)-(d) until a desired amount of polyamide is depolymerized.

Abstract translation: 聚酰胺通过以下方法半连续解聚：（a）将聚酰胺装入含有5至50重量％未聚合催化剂的解聚反应器; （b）熔化聚酰胺并使所得熔体经过过热蒸汽流，得到蒸汽馏出物; （c）将馏出物中的酰胺单体与其中的其它挥发物分离; （d）当酰胺单体的转化为40-90％完成时，将聚酰胺再填充到解聚反应器中; 和（e）重复步骤（a） - （d），直到所需量的聚酰胺解聚。

公开(公告)号：USRE33073E

公开(公告)日：1989-09-26

申请号：US171414

申请日：1988-03-21

Applicant: Hugo Fuchs ,  Uwe Brand ,  Helmut Buchaeckert

Inventor： Hugo Fuchs ,  Uwe Brand ,  Helmut Buchaeckert

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: Caprolactam is obtained by cleaving oligomers of caprolactam by a process in which the oligomers, in a liquid or solid state, are introduced into a fluidized alumina bed and cleaved at from 290.degree. to 400.degree. C. in the presence of steam, and, in addition to the amount of inert gas required to fluidize the alumina bed, from 0.1 to 3 times this amount of inert gas is introduced above the fluidized bed.

公开(公告)号：US4605762A

公开(公告)日：1986-08-12

申请号：US563812

申请日：1983-12-21

Applicant: Jorge W. Mandoki

Inventor： Jorge W. Mandoki

IPC: C07C27/02 ,  C07C51/09 ,  C07D201/12 ,  C07C51/487 ,  C07C85/26 ,  C07D487/00

CPC classification number: C08J11/14 ,  C07C51/09 ,  C07D201/12 ,  C08J2367/02 ,  Y02W30/704

Abstract: A process for the neutral hydrolytic depolymerization of condensation polymers is described. The process is conducted in a continuous manner and comprises introducing condensation polymer waste material into an aqueous hydrolysis zone at a temperature of between 200.degree. C. and 300.degree. C. and superatmospheric pressure of at least 15 atmospheres. High pressure steam is introduced into the lower portion of the hydrolysis zone underneath the level of the condensation polymer waste material. The steam serves as the principal source of heat for the hydrolysis zone. By being introduced underneath the level of the condensation polymer waste material, the steam agitates the waste material to provide heat transfer to accelerate the hydrolysis reaction. Further, a portion of the steam condenses to provide water which is a reactant in the hydrolysis reaction. An aqueous solution of the product(s) of the hydrolysis reaction is withdrawn from an upper portion of the hydrolysis zone.

Abstract translation: 描述了缩合聚合物的中性水解解聚的方法。 该方法以连续的方式进行，并且包括在200℃至300℃的温度和至少15个大气压的超大气压下将缩合聚合物废料引入水性水解区。 将高压蒸汽引入到缩合聚合物废料的水平面下方的水解区的下部。 蒸汽作为水解区的主要热源。 通过在冷凝聚合物废料的水平下引入，蒸汽搅动废料以提供热传递以加速水解反应。 此外，一部分蒸汽冷凝以提供作为水解反应中的反应物的水。 水解反应产物的水溶液从水解区的上部排出。

公开(公告)号：US4360461A

公开(公告)日：1982-11-23

申请号：US287696

申请日：1981-07-28

Applicant: Hugo Fuchs ,  Elmar Frommer ,  Otto-Alfred Grosskinsky

Inventor： Hugo Fuchs ,  Elmar Frommer ,  Otto-Alfred Grosskinsky

IPC: C07D201/12 ,  C08J11/02

CPC classification number: C08J11/02 ,  C07D201/12 ,  C08J2377/02

Abstract: In a process for obtaining caprolactam by cleaving caprolactam oligomers by passing them through an alumina catalyst bed at an elevated temperature, the improvement that the oligomers are introduced, as liquid or solid, into a fluidized bed of alumina and are cleaved at from 290.degree. to 400.degree. C. in the presence of steam.

Abstract translation: 在通过使己内酰胺低聚物通过在高温下通过氧化铝催化剂床而获得己内酰胺的方法中，将低聚物作为液体或固体引入到氧化铝的流化床中并且在290°至 400℃，在蒸汽存在下。

公开(公告)号：US4264501A

公开(公告)日：1981-04-28

申请号：US902884

申请日：1978-05-04

Applicant: Edmond H. J. P. Bour ,  Sijbrandus E. Schaafsma ,  Jean M. M. Warnier

Inventor： Edmond H. J. P. Bour ,  Sijbrandus E. Schaafsma ,  Jean M. M. Warnier

IPC: C07D207/263 ,  C07D201/12 ,  B01D3/38 ,  C07D207/12

CPC classification number: C07D201/12

Abstract: A process is described for the recovery of 2-pyrrolidone monomer from polypyrrolidone waste material by heating the latter in the presence of a small amount of strong acid, and distilling off the said monomer.

Abstract translation: 描述了一种从聚吡咯烷酮废料中回收2-吡咯烷酮单体的方法，通过在少量强酸的存在下加热2-吡咯烷酮单体并蒸馏出所述单体。

公开(公告)号：US4107160A

公开(公告)日：1978-08-15

申请号：US827370

申请日：1977-08-24

Applicant: Ovidiu Dicoi ,  Erwin Doerr

Inventor： Ovidiu Dicoi ,  Erwin Doerr

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: A process for the continuous recovery of caprolactam from either solid polycaprolactam waste by depolymerization or from liquid polycaprolactam extraction water from an extraction zone where, in either instance, a caprolactam water vapor mixture is produced and subsequently upgraded in a distillation zone to provide a dilute mixture of caprolactam and water vapor. A minor portion of this dilute caprolactam water vapor is condensed and recycled to the distillation zone. The remaining, major portion of this mixture is compressed and admixed with fresh steam, superheated and passed to either the extraction zone or depolymerization reaction.

Abstract translation: 从固体聚己内酰胺废物通过解聚连续回收己内酰胺或从液体聚己内酰胺萃取水中从萃取区连续回收己内酰胺的方法，其中在任何一种情况下产生己内酰胺水蒸气混合物，随后在蒸馏区中升级以提供稀释混合物 的己内酰胺和水蒸汽。 该稀少己内酰胺水蒸气的一小部分被冷凝并再循环到蒸馏区。 将该混合物的剩余部分压缩并与新鲜蒸汽混合，过热并通过萃取区或解聚反应。