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公开(公告)号：TR200201445T2
公开(公告)日：2002-12-23
申请号：TR200201445
申请日：2000-11-29
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PILLE RANGHILD , PIPPER GUNTER
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公开(公告)号：ZA200110043B
公开(公告)日：2002-12-06
申请号：ZA200110043
申请日：2001-12-06
Applicant: BASF AG
Inventor： MOHRSCHLADT RALF , HILDEBRANDT VOLKER , LUDWIG ALFONS
Abstract: A process for producing polyamides by reacting at least one lactam and optionally further polyamide-forming monomers with aqueous monomer and oligomer extracts obtained during the extraction with water of the polymer product obtained in the production of polyamides, the water content of the reaction mixture being in the range from 0.5 to 13% by weight comprises conducting the reaction in the presence of metal oxides, beta-zeolites, sheet-silicates or silica gels, which may be doped, as heterogeneous catalysts, the heterogeneous catalysts being used in the form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of the polymerization or after it has ended.
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公开(公告)号：SI1056799T1
公开(公告)日：2002-10-31
申请号：SI9830194
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
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公开(公告)号：SK17412001A3
公开(公告)日：2002-10-08
申请号：SK17412001
申请日：2000-06-05
Applicant: BASF AG
Inventor： MOHRSCHLADT RALF , HILDEBRANDT VOLKER , LUDWIG ALFONS
Abstract: A process for producing polyamides by reacting at least one lactam and optionally further polyamide-forming monomers with aqueous monomer and oligomer extracts obtained during the extraction with water of the polymer product obtained in the production of polyamides, the water content of the reaction mixture being in the range from 0.5 to 13% by weight comprises conducting the reaction in the presence of metal oxides, beta-zeolites, sheet-silicates or silica gels, which may be doped, as heterogeneous catalysts, the heterogeneous catalysts being used in the form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of the polymerization or after it has ended.
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公开(公告)号：BR9815006A
公开(公告)日：2002-09-24
申请号：BR9815006
申请日：1998-11-24
Applicant: BASF AG
Inventor： HILDENBRAND PETER , LANG REINHARD , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles in an essentially vertical extraction column using an aqueous extractant comprises using an extraction column that is divided into two zones and performing an extraction with a recirculating 15-40% strength by weight aqueous epsi-caprolactam solution in the first zone and then with countercurrent water at a from 5 to 40° C. lower temperature in the second zone. The process provides for economical extraction of polyamides with a low level of monomers and oligomers.
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Patent Agency Ranking
公开(公告)号：TR200001512T2
公开(公告)日：2002-08-21
申请号：TR200001512
申请日：1998-11-24
Applicant: BASF AG
Inventor： ERBES JOERG , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.
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公开(公告)号：MXPA01012159A
公开(公告)日：2002-07-30
申请号：MXPA01012159
申请日：2000-06-05
Applicant: BASF AG
Inventor： LUDWIG ALFONS
Abstract: Un procedimiento para producir poliamidas haciendo reaccionar por lo menos una lactama y opcionalmente otros monomeros formadores de poliamida con extractos de oligameros y monomeros acuosos obtenidos durante la extraccion con agua del producto de polimero obtenido en la produccion de poliamidas, encontrandose el contenido de agua de la mezcla de reaccion en el rango de 0,5 a 13% en peso, que comprende realizar la reaccion en presencia de oxidos de metal, beta-zeolitas, silicatos estratificados, geles de silice, que pueden estar impurificados, como catalizadores heterogeneos, utilizandose los catalizadores heterogeneos de una manera que permita la remocion mecanica de la mezcla de reaccion, y que son removidos de la mezcla de reaccion durante la polimerizacion o despues que ha finalizado.
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公开(公告)号：AU5437601A
公开(公告)日：2001-06-12
申请号：AU5437601
申请日：2000-11-29
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PILLE RAGNHILD , PIPPER GUNTER
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公开(公告)号：HU0100191A2
公开(公告)日：2001-05-28
申请号：HU0100191
申请日：1998-11-24
Applicant: BASF AG
Inventor： HILDENBRAND PETER , LANG REINHARD , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles in an essentially vertical extraction column using an aqueous extractant comprises using an extraction column that is divided into two zones and performing an extraction with a recirculating 15-40% strength by weight aqueous epsi-caprolactam solution in the first zone and then with countercurrent water at a from 5 to 40° C. lower temperature in the second zone. The process provides for economical extraction of polyamides with a low level of monomers and oligomers.
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公开(公告)号：PL341685A1
公开(公告)日：2001-04-23
申请号：PL34168598
申请日：1998-11-24
Applicant: BASF AG
Inventor： ERBES JOERG , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.
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