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公开(公告)号：EP0676394B1
公开(公告)日：2003-02-12
申请号：EP95104468.4
申请日：1995-03-27
Applicant: Honeywell International Inc.
IPC: C07D201/12 , C08J11/14
CPC classification number: C07D201/12
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172.发明授权PROCESS FOR DEPOLYMERIZING POLYCAPROLACTAM PROCESSING WASTE TO FORM CAPROLACTAM 失效程序对POLYCAPROLACTAMABFÄLLEN的解聚用于生产己内酰胺
公开(公告)号：EP0892782B1
公开(公告)日：2001-05-09
申请号：EP97914854.1
申请日：1997-03-05
Applicant: Honeywell International Inc.
Inventor： SIFNIADES, Stylianos , LEVY, Alan, Bart
IPC: C07D201/12 , C07D201/16 , C08J11/14
CPC classification number: C07D201/16 , C07D201/12
Abstract: The present invention provides an improved process for the recovery of caprolactam from polycaprolactam processing waste. The present process for depolymerizing polycaprolactam waste to form caprolactam comprises the step of: in the absence of added catalyst, contacting the polycaprolactam waste with superheated steam at a temperature of about 250 °C to about 400 °C and at a pressure within the range of about 1.5 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.
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公开(公告)号：EP0568882B1
公开(公告)日：1999-07-14
申请号：EP93106681.5
申请日：1993-04-24
Applicant: BASF Aktiengesellschaft
IPC: C07D201/12 , C07D223/10
CPC classification number: C07D201/12
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174.发明公开OBTAINING CAPROLACTAM BY DEPOLYMERIZATION OF MOLTEN POLYCAPROLACTAM 失效通过POLYCAPROLACTAMSCHMELZEN的解聚己内酰胺OBTAINING
公开(公告)号：EP0797572A1
公开(公告)日：1997-10-01
申请号：EP95941647.0
申请日：1995-12-01
Applicant: BASF AKTIENGESELLSCHAFT
Inventor： KALCK, Ulrich , JONES, Simon, A. , BASSLER, Peter , PRIESTER, Claus, Ulrich , KOPIETZ, Michael
IPC: C07D201
CPC classification number: C07D201/12
Abstract: Caprolactam is obtained from mixtures which contain polymers or thermoplastic molding materials having the repeating unit -[-N(H)-(CH2)5-C(O)-]-, (a) by depolymerization at elevated temperatures in the presence of a base under reduced pressure or (b) in the presence of water, by using a mixture essentially comprising, from 50 to 99.9 % by weight of a polymer or of a thermoplastic molding material having the repeating unit -[-N(H)-(CH2)5-C(O)-]-; from 0.1 to 50 % by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes; from 0 to 10 % by weight of organic and/or inorganic aditives; from 0 to 40 % by weight of non-polyamide-containing polymers and from 0 to 20 % by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam, and carrying out the depolymerization in the presence of a base under reduced pressure, the water content of the mixture used being not more than 0.01 % by weight, or carrying out the depolymerization in the presence of water without the addition of acid or base at from 270 to 350 °C and a weight ratio of water to polymer or thermoplastic molding material of from 1:1 to 20:1 and in a reaction time of less than 3 hours.
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公开(公告)号：EP0670307A3
公开(公告)日：1996-03-06
申请号：EP95102564.2
申请日：1995-02-23
Applicant: BASF CORPORATION
Inventor： Losier, Thomas P. , Johnson, Donald R. , Fuchs, Hugo. Dr. , Neubauer, Gerald, Dr. , Ritz, Josef, Dr.
IPC: C07D201/16 , C07D201/12
CPC classification number: C07D201/12 , C07D201/16 , Y10S203/90
Abstract: Disclosed is a process for recovering and purifying crude caprolactam from crude caprolactam-containing wastewaters consisting essentially of the steps:
(a) obtaining a wastewater stream containing crude caprolactam from at least one process which by-produces a crude caprolactam-containing wastewater stream selected from caprolactam polymerization, catalytic cracking of polymers and oligomers of caprolactam, and thermoplastic processing of polycaprolactam; (b) mixing the crude caprolactam-containing wastewater stream with between 0.01 to 5% by weight, based on the crude caprolactam in the wastewater stream, of an acid; (c) subjecting the mixture of crude caprolactam-containing wastewater stream and acid obtained according to step (b) to purification distillation at a temperature of between 100 to 180°C and a pressure of between 50 to 3000 Pa; and (d) obtaining purified crude caprolactam as a distillate from step (c).-
Patent Agency Ranking
公开(公告)号：EP0670307A2
公开(公告)日：1995-09-06
申请号：EP95102564.2
申请日：1995-02-23
Applicant: BASF CORPORATION
Inventor： Losier, Thomas P. , Johnson, Donald R. , Fuchs, Hugo. Dr. , Neubauer, Gerald, Dr. , Ritz, Josef, Dr.
IPC: C07D201/16 , C07D201/12
CPC classification number: C07D201/12 , C07D201/16 , Y10S203/90
Abstract: Disclosed is a process for recovering and purifying crude caprolactam from crude caprolactam-containing wastewaters consisting essentially of the steps:
(a) obtaining a wastewater stream containing crude caprolactam from at least one process which by-produces a crude caprolactam-containing wastewater stream selected from caprolactam polymerization, catalytic cracking of polymers and oligomers of caprolactam, and thermoplastic processing of polycaprolactam;
(b) mixing the crude caprolactam-containing wastewater stream with between 0.01 to 5% by weight, based on the crude caprolactam in the wastewater stream, of an acid;
(c) subjecting the mixture of crude caprolactam-containing wastewater stream and acid obtained according to step (b) to purification distillation at a temperature of between 100 to 180°C and a pressure of between 50 to 3000 Pa; and
(d) obtaining purified crude caprolactam as a distillate from step (c).Abstract translation: 公开了一种从粗制己内酰胺废水中回收和纯化粗己内酰胺的方法，其基本上由以下步骤组成：（a）从至少一种方法获得含有粗己内酰胺的废水流，该方法通过副产生含有己内酰胺的粗制废水，其选自 己内酰胺聚合，聚合物和己内酰胺低聚物的催化裂化和聚己内酰胺的热塑性加工; （b）根据废水流中的粗己内酰胺将粗己内酰胺废水流与0.01至5重量％的酸混合; （c）使含有含己内酰胺的废水流和根据步骤（b）获得的酸的混合物在100至180℃的温度和50至3000Pa之间的压力下进行纯化; 和（d）从步骤（c）获得纯化的己内酰胺作为馏出物。
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177.发明公开DEPOLYMERIZATION OF NYLON 6,6 (AND OPTIONALLY) NYLON 6 TO OBTAIN HEXAMETHYLENE DIAMINE (AND CAPROLACTAM) 失效尼龙66（AND，IF尼龙6）的六亚甲基二胺FOR（和己内酰胺）的制备解聚。
公开(公告)号：EP0664787A1
公开(公告)日：1995-08-02
申请号：EP93923278.0
申请日：1993-10-13
Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
Inventor： MORAN, Edward, Francis, Jr.
CPC classification number: C07D201/12 , C07C209/62
Abstract: A process is disclosed for simultaneously depolymerizing nylon 6 and 6,6 and reclaiming the monomer values by steam distillation, in the presence of a basic nylon depolymerizing catalyst.
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公开(公告)号：EP0659176A1
公开(公告)日：1995-06-28
申请号：EP93919262.0
申请日：1993-09-04
Applicant: BASF CORPORATION
Inventor： CORBIN, Thomas, F. , HANDERMANN, Alan, C. , KOTEK, Richard , PORTER, William, D. , DELLINGER, Jack, A. , DAVIS, Edward, A.
CPC classification number: C08G69/14 , C07D201/12 , Y02P20/582
Abstract: ε-Caprolactam is continuously recovered from carpet made from nylon 6 face fibers and a backing. The carpet is fed to a separator to prepare scrap containing nylon 6 and auxiliary materials. The scrap from the separator is fed to a depolymerizing reactor to produce an ε-caprolactam containing distillate and more auxiliary materials. The ε-caprolactam in the distillate is separated from other volatiles and purified. The auxiliary materials are also recovered or re-used.
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179.发明公开Verfahren zur Rückgewinnung von Caprolactam aus Polycaprolactam 无效Verfahren zurRückgewinnungvon己内酰胺aus聚己内酰胺。
公开(公告)号：EP0568882A1
公开(公告)日：1993-11-10
申请号：EP93106681.5
申请日：1993-04-24
Applicant: BASF Aktiengesellschaft
IPC: C07D201/12 , C07D223/10
CPC classification number: C07D201/12
Abstract: Verfahren zur Rückgewinnung von Caprolactam aus Polycaprolactam durch hydrolytische Spaltung von Polycaprolactam mit 5 bis 50 Gewichtsteilen Wasser je Gewichtsteil Polycaprolactam bei einer Temperatur von 200 bis 350°C unter erhöhtem Druck unter Erhalt einer wäßrigen Lösung oder Suspension, die monomeres Caprolactam, dessen Oligomeres und gegebenenfalls Polycaprolactam enthält und anschließendes Abtrennen von monomerem Caprolactam aus der wäßrigen Lösung oder Suspension durch Destillation oder Extraktion, wobei man die hydrolytische Spaltung unter Mitverwendung von Alkalihydroxid bei einem pH-Wert von 5 bis 10 durchführt.
Abstract translation: 通过水解溶液或悬浮液的制备，在200-350℃的温度下，通过用聚己内酰胺水解裂解聚己内酰胺与5至50重量份水/重量份聚己内酰胺，从聚己内酰胺中回收己内酰胺的方法， 含有单体己内酰胺，其低聚物和任选的聚己内酰胺，随后通过蒸馏或萃取从水溶液或悬浮液中除去单体己内酰胺，水解裂解在5至10的pH下进一步使用碱金属氢氧化物。
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180.发明授权Verfahren zur Gewinnung von Caprolactam durch Spaltung von Oligomeren des Caprolactams 失效通过分解CAPROLACTAM低聚物来恢复CAPROLACTAM的方法
公开(公告)号：EP0209021B1
公开(公告)日：1991-01-23
申请号：EP86109184.1
申请日：1986-07-04
Applicant: BASF Aktiengesellschaft
Inventor： Fuchs, Hugo, Dr. , Brand, Uwe , Buchaeckert, Helmut
IPC: C07D201/12
CPC classification number: C07D201/12
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