公开(公告)号：CA2208226A1

公开(公告)日：1996-06-20

申请号：CA2208226

申请日：1995-12-01

Applicant: BASF AG

Inventor： BASSLER PETER ,  KOPIETZ MICHAEL

IPC: B03B9/06 ,  C07D201/12 ,  C08J11/14 ,  C07D223/10

Abstract: Disclosed is a method of obtaining caprolactam from polymers containing caprolactam in the presence of superheated water. The proposed method is based on the use of polymers containing the repeating unit -¢-N(H)-(CH2)5-C(O)-!- or mixtures consisting essentially of: 40-99.99 wt.% of a polymer containing the repeating unit -¢-N(H)-(CH2)5-C(O)-!-;0.01-50 wt.% of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes; 0-10 wt.% of organic and/or inorganic additives; 0-40 wt.% of polymers which do not contain polyamide; 0-60 wt.% of polyamides with the exception of polycaprolactam and copolyamides based on caprolactam. These polymers or mixtures are brought into contact with superheated water at a temperature of 280-320 ~C and at a pressure of 7.5-15 Mpa, the weight ratio of water to the polymer containing the repeating unit -¢-N(H)-(CH2)5-C(O)-!- being between 5:1 and 13:1 and the reaction time less than 3 hours. The reaction mixture consisting essentially of water and the polymers or mixture indicated above should contain no gaseous phase under the conditions of hydrolysis.

公开(公告)号：SK281068B6

公开(公告)日：2000-11-07

申请号：SK66797

申请日：1995-12-01

Applicant: BASF AG

Inventor： BASSLER PETER ,  KOPIETZ MICHAEL

IPC: B03B9/06 ,  C07D201/12 ,  C08J11/14

Abstract: Disclosed is a method of obtaining caprolactam from polymers containing caprolactam in the presence of superheated water. The proposed method is based on the use of polymers containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of: a polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]-; of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes; of organic and/or inorganic additives; of polymers which do not contain polyamide; of polyamides with the exception of polycaprolactam and copolyamides based on caprolactam. These polymers or mixtures are brought into contact with superheated water at a temperature of 280 - 320 C and at a pressure of 7.5 - 15 Mpa, the weight ratio of water to the polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- being between 5 : 1 and 13 : 1 and the reaction time less than 3 hours. The reaction mixture consisting essentially of water and the polymers or mixture indicated above should contain no gaseous phase under the conditions of hydrolysis. Also disclosed is an apparatus for making the same and the use of the said method and apparatus for recycling polycaprolactam-containing wastes.

公开(公告)号：ES2129885T3

公开(公告)日：1999-06-16

申请号：ES95941645

申请日：1995-12-01

Applicant: BASF AG

Inventor： BASSLER PETER ,  KOPIETZ MICHAEL

IPC: B03B9/06 ,  C07D201/12 ,  C08J11/14

Abstract: Caprolactam is obtained from caprolactam-containing polymers in the presence of superheated water by bringing polymers which contain the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of -from 40 to 99.9% by weight of a polymer containing the repeat- - ing unit -[-N(H)-(CH2)5-C(O)-]-, -from 0.01 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 60% by weight of polyamides, with the exception of - polycaprolactam and copolyamides prepared - from caprolactam, - into contact with superheated water at from 280 DEG to 320 DEG C. and from 7.5 to 15 MPa and a weight ratio of water to polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- of from 5:1 to 13:1 and in a reaction time of less than 3 hours, with the proviso that the reaction mixture, consisting essentially of water and the polymer used or the mixture used, contains no gaseous phase under the conditions of the hydrolysis.

公开(公告)号：SK66897A3

公开(公告)日：1998-03-04

申请号：SK66897

申请日：1995-12-01

Applicant: BASF AG

Inventor： KALCK ULRICH ,  JONES SIMON A ,  BASSLER PETER ,  PRIESTER CLAUS U ,  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)-]-, by depolymerization at elevated temperatures in the presence of a base under reduced pressure or 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 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 pressure from 80 to 150 kPa 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：BG101572A

公开(公告)日：1998-01-30

申请号：BG10157297

申请日：1997-06-05

Applicant: BASF AG

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

IPC: C07D201/12

Abstract: Caprolactam is produced from mixtures including polymers orthermoplastic moulded materials containing the repetitativestructural unit -[N(H)-(CH2)5-C(O)-]-, by depolymerization atelevated temperatures in the presence of a base at reducedpressure or in the presence of water by using a mixture consistingof the following components, in wt.%: from 50 to 99.9 polymer orthermoplastic moulded materials containing the repetitativestructural unit -[N(H)-(CH2)5-C(O)-]-, from 0.1 to 50 additivesselected from inorganic fillers, organic and inorganic pigmentsand dyestuffs, from 0 to 10 organic and/or inorganic additives,from 0 to 40 non-polyamide-containing polymers, and from 0 to 20polyamides, with the exception of polycaprolactam andco-polyamides produced from caprolactam. Depolymerization occursin the presence of a base under reduced pressure, the watercontent of the mixture used is not more than 0.01% wt., or in thepresence of water without any addition of acid or base attemperatures ranging from 270 to 350°C, weight ratio between waterand polymer or the thermoplastic moulded material from 1:1 to 20:1and reaction time 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：AU4300996A

公开(公告)日：1996-07-03

申请号：AU4300996

申请日：1995-12-01

Applicant: BASF AG

Inventor： BASSLER PETER ,  KOPIETZ MICHAEL

IPC: B03B9/06 ,  C07D201/12 ,  C08J11/14

Abstract: Caprolactam is obtained from caprolactam-containing polymers in the presence of superheated water by bringing polymers which contain the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of -from 40 to 99.9% by weight of a polymer containing the repeat- - ing unit -[-N(H)-(CH2)5-C(O)-]-, -from 0.01 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 60% by weight of polyamides, with the exception of - polycaprolactam and copolyamides prepared - from caprolactam, - into contact with superheated water at from 280 DEG to 320 DEG C. and from 7.5 to 15 MPa and a weight ratio of water to polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- of from 5:1 to 13:1 and in a reaction time of less than 3 hours, with the proviso that the reaction mixture, consisting essentially of water and the polymer used or the mixture used, contains no gaseous phase under the conditions of the hydrolysis.

公开(公告)号：AU4177496A

公开(公告)日：1996-07-03

申请号：AU4177496

申请日：1995-12-01

Applicant: BASF AG

Inventor： KOPIETZ MICHAEL ,  HANDERMAN ALAN ,  JONES SIMON ,  KALCK ULRICH ,  PRIESTER CLAUS-ULRICH ,  AUER HEINZ ,  RITZ JOSEF ,  FUCHS HUGO ,  PIJL PAUL

IPC: B01J8/10 ,  C07D201/12 ,  C08G69/14 ,  C08J11/16

Abstract: Caprolactam is obtained from caprolactam-containing polymers in the presence of a base under reduced pressure by depolymerizing polymers which contain the repeating unit -[-N(H)-(CH2)5-C(O)-] or mixtures consisting essentially of from 50 to 99.99% by weight of a polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- from 0.01 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, in at least two depolymerization reactors connected in series.

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.