公开(公告)号：US5681952A

公开(公告)日：1997-10-28

申请号：US569640

申请日：1995-12-08

Applicant: Stylianos Sifniades ,  Alan Bart Levy ,  Jan Agnes Jozef Hendrix

Inventor： Stylianos Sifniades ,  Alan Bart Levy ,  Jan Agnes Jozef Hendrix

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam- containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.

Abstract translation: 本发明提供了一种从含有聚己内酰胺的废料中回收己内酰胺的有效方法。 用于解聚包含聚己内酰胺和非聚己内酰胺组分以形成己内酰胺的多组分废料的本方法包括以下步骤：在不加入催化剂的情况下，将多组分废料与过热蒸汽在约250℃的温度下接触 约400℃，在约1大气压至约100大气压的范围内的压力，并且在其中形成含己内酰胺的蒸汽流的温度下，基本上小于饱和的水蒸气压。 然后，所形成的己内酰胺可以用于工程化树脂和纤维的生产。

公开(公告)号：US5556890A

公开(公告)日：1996-09-17

申请号：US253010

申请日：1994-06-02

Applicant: Antoon H. T. Halderit ,  Martin Booij ,  Jan A. J. Hendrix ,  Yvonne H. Frentzen

Inventor： Antoon H. T. Halderit ,  Martin Booij ,  Jan A. J. Hendrix ,  Yvonne H. Frentzen

IPC: C07D201/12 ,  C07D201/16 ,  C08J11/14

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: The present invention is for a method of preparing purified .epsilon.-caprolactam from carpet waste containing nylon-6. Contaminated .epsilon.-caprolactam is obtained by depolymerizing nylon-6 from carpet waste. A mixture of the contaminated .epsilon.-caprolactam and water is then hydrogenated in the presence of hydrogen and a hydrogenation catalyst in order to produce purified .epsilon.-caprolactam. The amount of contaminated .epsilon.-caprolactam in the mixture can be between 10 and 95% by weight.

Abstract translation: 本发明涉及从含有尼龙-6的地毯废物中制备纯化的ε-己内酰胺的方法。 通过从地毯废物中解聚尼龙-6得到受污染的ε-己内酰胺。 然后将污染的ε-己内酰胺和水的混合物在氢气和氢化催化剂的存在下氢化，以产生纯化的ε-己内酰胺。 混合物中受污染的ε-己内酰胺的量可以在10至95重量％之间。

公开(公告)号：US5266694A

公开(公告)日：1993-11-30

申请号：US963224

申请日：1992-10-19

Applicant: Edward F. Moran, Jr.

Inventor： Edward F. Moran, Jr.

IPC: C07C209/62 ,  C07C211/12 ,  C07D201/12 ,  C07C201/12

CPC classification number: C07D201/12 ,  C07C209/62

Abstract: A process is disclosed for simultaneously depolymerizing nylon 6 and nylon 6,6 and reclaiming the monomer values by steam distillation.

Abstract translation: 公开了同时解聚尼龙6和尼龙6,6并通过蒸汽蒸馏回收单体值的方法。

公开(公告)号：US5241066A

公开(公告)日：1993-08-31

申请号：US904223

申请日：1992-06-25

Applicant: Edward A. Davis ,  Jack A. Dellinger

Inventor： Edward A. Davis ,  Jack A. Dellinger

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: A process for recovering caprolactam from waste containing both polycaprolactam and materials which are insoluble in acidic solvents for polycaprolactam includes agitating the waste in an acidic solvent capable of dissolving polycaprolactam without degrading the acid insoluble materials, separating the solution containing polycaprolactam from the acid insoluble materials, feeding the solution containing the polycaprolactam to a depolymerization reactor, without substantially precipitating the polycaprolactam and depolymerizing the polycaprolactam solution to obtain substantially pure caprolactam.

公开(公告)号：US5169870A

公开(公告)日：1992-12-08

申请号：US718720

申请日：1991-06-21

Applicant: Thomas F. Corbin ,  Edward A. Davis ,  Jack A. Dellinger

Inventor： Thomas F. Corbin ,  Edward A. Davis ,  Jack A. Dellinger

IPC: B29B17/02 ,  B29K77/00 ,  B29K105/26 ,  C07D201/12 ,  C08G69/14 ,  C08J11/00

CPC classification number: C07D201/12 ,  C08G69/14 ,  Y02P20/582

Abstract: A process for the continuous recovery of .epsilon.-caprolactam provides a carpet made from nylon 6 fibers and having a backing to a separator to prepare scrap containing nylon 6 and waste. The scrap from the separator is fed to a depolymerizing reactor where the scrap is subjected to a depolymerization catalyst, temperatures of at least the melting point of nylon 6 and superheated steam to produce an .epsilon.-caprolactam containing distillate and more waste. The .epsilon.-caprolactam in the distillate is separated from other volatiles therein; and purified.

公开(公告)号：US3600381A

公开(公告)日：1971-08-17

申请号：US3600381D

申请日：1969-04-21

Applicant: TEIJIN LTD

Inventor： YAMAMOTO AKIRA ,  YASUDA MAKOTO ,  FURUSAWA YUTAKA

IPC: C07D201/12 ,  C07D41/06

CPC classification number: C07D201/12

Abstract: A METHOD FOR THE PREPARATION OF PURE LACTAM FROM AN OLIGOMER-CONTAINING CRUDE LACTAM BY EVAPORATING SAID OLIGOMER-CONTAINING CRUDE LACTAM AT A TEMPERATURE LESS THAN THE EVAPORATION TEMPERATURE OF SAID LACTAM WHILE MAINTAINING SAID LACTAM UNDER ALKALINE CONDITIONS AND THEN RECTIFYING SAID OLIGOMER-CONTAINING CRUDE LACTAM. FURTHER PURIFICATION OF THE CRUDE LACTAM REMAINING AFTER RECTIFICATION CAN BE CARRIED OUT BY DEPOLYMERIZATION OF SAID CRUDE LACTAM IN THE PRESENCE OF AN ACIDIC CATALYST AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 220*C. TO ABOUT 350*C. AND AT A PRESSURE WITHIN THE RANGE FROM ABOUT 0.5 TO ABOUT 6 ATMOSPHERES, SEPARATING A LACTAM AQUEOUS SOLUTION, OXIDIZING SAID LACTAM AQUEOUS SOLUTION UNTIL THE PERMANGANATE NUMBER OF THE LACTAM IS BELOW 1.50, REDUCING THE WATER CONTENT FROM SAID LACTAM AQUEOUS SOLUTION TO AT LEAST ABOUT 5%, AND RECIRULATING SAID LACTAM AQUEOUS SOLUTION TO SAID EVAPORATING STEP.

公开(公告)号：US2501376A

公开(公告)日：1950-03-21

申请号：US65006746

申请日：1946-02-25

Applicant: GEN ELECTRIC

Inventor： LEONARD BREADNER ROBERT ,  GRAINGER JENKINS HENRY ,  HENRY SIMMS CHARLES

IPC: C07D201/12 ,  H01J61/30 ,  H01J61/94

CPC classification number: C07D201/12 ,  H01J61/307 ,  H01J61/94

公开(公告)号：US20050054739A1

公开(公告)日：2005-03-10

申请号：US10897473

申请日：2004-07-23

Applicant: Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

Inventor： Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

IPC: C07D201/12 ,  C08F6/00

CPC classification number: C07D201/12

Abstract: The invention relates to a method for the treatment of waste containing polyamide comprising a) depolymerisation of the waste containing polyamide, whereby a caprolactam raw material (6) and a flow (3), comprising the secondary constituents and additives from the depolymerisation, are obtained, and b) leaching of the flow (3) at least once using an extracting agent.

Abstract translation: 本发明涉及一种处理含有聚酰胺的废物的方法，包括：a）含有聚酰胺的废物的解聚，由此获得包含来自解聚的第二组分和添加剂的己内酰胺原料（6）和流动物（3） ，和b）使用提取剂至少一次浸出所述流（3）。

公开(公告)号：US5962681A

公开(公告)日：1999-10-05

申请号：US972763

申请日：1997-11-18

Applicant: Horst Egly ,  Hans-Harald Hunger ,  Thomas Sauer

Inventor： Horst Egly ,  Hans-Harald Hunger ,  Thomas Sauer

IPC: C07D201/16 ,  C07D201/12

CPC classification number: C07D201/16

Abstract: The disclosure is a process for recovering caprolactam monomer and oligomer from aqueous polycaprolactam extracts by removing the inorganic contaminants present therein.

Abstract translation: 本公开是通过除去其中存在的无机污染物从己酸内酰胺水溶液萃取物中回收己内酰胺单体和低聚物的方法。

公开(公告)号：US5932724A

公开(公告)日：1999-08-03

申请号：US843502

申请日：1997-04-16

Applicant: Stylianos Sifniades ,  Alan Bart Levy ,  Jan Agnes Jozef Hendrix

Inventor： Stylianos Sifniades ,  Alan Bart Levy ,  Jan Agnes Jozef Hendrix

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.

Abstract translation: 本发明提供了一种从含有聚己内酰胺的废料中回收己内酰胺的有效方法。 用于解聚包含聚己内酰胺和非聚己内酰胺组分以形成己内酰胺的多组分废料的本方法包括以下步骤：在不加入催化剂的情况下，将多组分废料与过热蒸汽在约250℃的温度下接触 约400℃，并且在约1atm至约100atm范围内的压力下，并且基本上小于在其中形成含己内酰胺的蒸气流的温度下的饱和蒸气压。 然后，所形成的己内酰胺可以用于工程化树脂和纤维的生产。