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：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.