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    11.
    发明专利
    未知

    公开(公告)号：NL194503B

    公开(公告)日：2002-02-01

    申请号：NL9301488

    申请日：1993-08-30

    Applicant: BASF AG

    Inventor： FUCHS HUGO ,  NEUBAUER GERALD ,  PRIESTER CLAUS-ULRICH

    IPC: C07B63/02 ,  C07D201/16 ,  C07D223/10

    Abstract: Caprolactam is purified by oxidative treatment in which mixtures which essentially contain the caprolactam to be purified and unsaturated lactams are treated with oxygen or an oxygen-containing gas mixture in an alkaline medium.

    12.
    发明专利
    未知

    公开(公告)号：BR9509991A

    公开(公告)日：1997-12-30

    申请号：BR9509991

    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.

    14.
    发明专利
    未知

    公开(公告)号：DE3775080D1

    公开(公告)日：1992-01-23

    申请号：DE3775080

    申请日：1987-01-23

    Applicant: BASF AG

    Inventor： HUTMACHER HANS-MARTIN ,  MERGER FRANZ ,  BROECKER FRANZ JOSEF ,  FISCHER ROLF ,  VAGT UWE ,  HARDER WOLFGANG ,  PRIESTER CLAUS-ULRICH ,  SCHNEIDER HEINZ-WALTER ,  RICHTER WOLFGANG

    IPC: B01J23/74 ,  B01J23/78 ,  B01J25/00 ,  C07B61/00 ,  C07D201/08

    Abstract: (i) 5-formyl-valeric acid ester is reacted with excess NH3 and H2, using alkanols as solvents, in the presence of hydrogenation catalysts, at 40-130 deg.C. (ii) NH3 and H2 are removed from the reaction mixt. obtd. (iii) The reaction mixt. is heated to 150-250 deg.C and caprolactam is recovered. (A) Catalysts are used which are prepd. by calcining cpds. having formula (I): ((MgaNi(II)bCo(II)c)Al2)CO3(OH)16 x 4 H2O (I) a = integer or decimal no. 0-4; b,c = integers or decimal nos. 0-6; provided that 2 x (a + b + c) = 2. at 200-600 deg.C and subsequent redn. with H2 at higher temp. (B) Ni catalysts can also be used contg. 30-60 wt.% finely-divided Ni pptd. on Mg silicate. (C) Raney-Ni or Raney-Co catalysts can be used in a suspension process. (D) The Raney-Ni or Raney-Co catalyst can be fixed magnetically or electro-magnetically in the reaction-zone.

    PREPARATION OF CAPROLACTAM
    16.
    发明专利
    PREPARATION OF CAPROLACTAM 未知

    公开(公告)号：CA2003552A1

    公开(公告)日：1990-06-24

    申请号：CA2003552

    申请日：1989-11-20

    Applicant: BASF AG

    Inventor： MERGER FRANZ ,  FISCHER ROLF ,  PRIESTER CLAUS-ULRICH

    IPC: C07D201/08

    Abstract: Caprolactam is prepared by heating a 6-aminocaproic ester in liquid phase in the presence of water to 230 DEG -350 DEG C. under superatmospheric pressure in a reaction medium comprising a liquid aromatic hydrocarbon having a boiling point of from 80 DEG to 240 DEG C. which is inert under reaction conditions, and isolating caprolactam from the reaction mixture.

    18.
    发明专利
    未知

    公开(公告)号：DE3643010A1

    公开(公告)日：1988-06-30

    申请号：DE3643010

    申请日：1986-12-17

    Applicant: BASF AG

    Inventor： MERGER FRANZ ,  PRIESTER CLAUS-ULRICH ,  FISCHER ROLF ,  SAUERWALD MANFRED

    IPC: C07D201/08 ,  C07D223/10

    Abstract: Caprolactam is prepared by heating a 6-aminocaproic ester at 100 DEG -320 DEG C. in the presence of a reaction medium comprising an aromatic hydrocarbon which is liquid under reaction conditions and has a boiling point from 80 DEG to 240 DEG C., and isolating caprolactam from the reaction medium.

    20.
    发明专利
    未知

    公开(公告)号：BR9509987A

    公开(公告)日：1997-12-30

    申请号：BR9509987

    申请日：1995-12-01

    Applicant: BASF AG

    Inventor： KOPIETZ MICHAEL ,  HANDERMAN ALAN ,  JONES SIMON A ,  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.

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