公开(公告)号：CZ176497A3

公开(公告)日：1998-01-14

申请号：CZ176497

申请日：1995-12-01

Applicant: BASF AG

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

IPC: 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 cleavage 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 additives, 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 cleavage 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 cleavage in the presence of water without the addition of acid or base at from 270 DEG to 350 DEG 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.

公开(公告)号：PL320594A1

公开(公告)日：1997-10-13

申请号：PL32059495

申请日：1995-12-01

Applicant: BASF AG

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

IPC: 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 cleavage 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 additives, 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 cleavage 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 cleavage in the presence of water without the addition of acid or base at from 270 DEG to 350 DEG 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.

公开(公告)号：AU4301196A

公开(公告)日：1996-07-03

申请号：AU4301196

申请日：1995-12-01

Applicant: BASF AG

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

IPC: 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 cleavage 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 additives, 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 cleavage 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 cleavage in the presence of water without the addition of acid or base at from 270 DEG to 350 DEG 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.

公开(公告)号：CZ287899B6

公开(公告)日：2001-03-14

申请号：CZ176497

申请日：1995-12-01

Applicant: BASF AG

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

IPC: C07D201/12

Abstract: Caprolactam is obtained from a mixture that contains polymers or thermoplastic moulding materials having repeating units -¦-N(H)-(CHi2)i5-C(O)-¦-, (a) by depolymerization at elevated temperatures and in the presence of a base and under reduced pressure, or (b) in the presence of water, whereby the mixture contains substantially: 50 to 99.9 percent by weight of polymer or the thermoplastic moulding material having the repeating units, -¦-N(H)-(CHi2)i5-C(O)-¦-; 0.1 do 50 percent by weight of ingredients being selected from a group comprising inorganic filling agents, organic or inorganic pigments and dyestuffs; 0 to 10 percent by weight of organic and/or inorganic additives; 0 to 40 percent by weight of a polymer that is free of polyamide and 0 to 20 percent by weight of polyamides except for polycaprolactam and copolyamides being prepared from caprolactam. The depolymerization process ia carried out in the presence of water without addition of acid or base at a temperature ranging from 270 to 350 degC and weight ratio of water to the polymer or the thermoplastic moulding material ranging from 1:1 to 20:1 and for a reaction period shorter than 3 hours.

公开(公告)号：DE59309693D1

公开(公告)日：1999-08-19

申请号：DE59309693

申请日：1993-04-24

Applicant: BASF AG

Inventor： FUCHS HUGO ,  RITZ JOSEF ,  PRIESTER CLAUS ULRICH ,  NEUBAUER GERALD

IPC: C07D201/12 ,  C07D223/10 ,  C08G69/14

Abstract: Process for the recovery of caprolactam from polycaprolactam by hydrolytic cleavage of polycaprolactam with 5 to 50 parts by weight of water per part by weight of polycaprolactam at a temperature from 200 to 350 DEG C at elevated pressure with the production of an aqueous solution or suspension which contains monomeric caprolactam, its oligomer and optionally polycaprolactam and subsequent removal of monomeric caprolactam from the aqueous solution or suspension by distillation or extraction, the hydrolytic cleavage being carried out at a pH from 5 to 10 with the additional use of alkali metal hydroxide.

公开(公告)号：CZ9701764A3

公开(公告)日：1998-01-14

申请号：CZ176497

申请日：1995-12-01

Applicant: BASF AG

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

IPC: C07D201/12

CPC classification number: C07D201/12

公开(公告)号：CA2208222A1

公开(公告)日：1996-06-20

申请号：CA2208222

申请日：1995-12-01

Applicant: BASF AG

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

IPC: C07D201/12 ,  C07D223/10

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.

公开(公告)号：SK282229B6

公开(公告)日：2001-12-03

申请号：SK66897

申请日：1995-12-01

Applicant: BASF AG

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

IPC: 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 cleavage 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 additives, 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 cleavage 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 cleavage in the presence of water without the addition of acid or base at from 270 DEG to 350 DEG 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.

公开(公告)号：MX9704250A

公开(公告)日：1997-09-30

申请号：MX9704250

申请日：1995-12-01

Applicant: BASF AG

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

IPC: C07D201/12

Abstract: Se obtiene caprolactama a partir de mezclas que contienen polímeros o materiales de moldeo termoplásticos que tienen la unidad respectiva -[-N(H)-(CH2)5-C(O)-]-, (a) mediante despolimerizacion a temperaturas elevadas en presencia de una base bajo presion reducida o (b) en presencia de agua, utilizando una mezcla que comprende esencialmente de 50 a 99.9% en peso de un polímero o de un material de moldeo termoplástico que tiene la unidad repetitiva -[-N(H)-(CH2)5-C(O)-]-, de 0.1 a 50% en peso de aditivos seleccionados a partir del grupo que consiste en rellenos inorgánicos, pigmentos y colorantes orgánicos e inorgánicos, de 0 a 10% en peso de aditivos orgánicos y/o inorgánicos, de 0 a 40% en peso de un polímero que no contienen poliamida y de 0a 20% en peso de poliamidas, con la excepcion de policaprolactama y copoliamidas preparadas a partir de caprolactama, y llevar a cabo la despolimerizacion en presencia de una base bajo presion reducida, el contenido de agua de la mezcla utilizada no siendo más de 0.01% en peso, o llevar a cabo la despolimerizacion en presencia de agua sin la adicion deácido o base a de 270 a 350 degree C y una relacion en peso de agua a polímero o material de moldeo termoplástico de 1:1 a 20:1 y en un tiempo de reaccion de menos de 3 horas.