公开(公告)号：ID22685A

公开(公告)日：1999-12-09

申请号：ID990802

申请日：1998-01-17

Applicant: BASF AG

Inventor： BASSLER PETER ,  LUYKEN HERMANN ,  REHFINGER ALWIN ,  RUST HARALD

IPC: C07C255/24 ,  C07C253/34

Abstract: A process for distillative removal of 6-aminocapronitrile from mixtures (I) comprising 6-aminocapronitrile and an imine (II) comprises conducting the distillation in the presence of carbon dioxide.

公开(公告)号：CZ391698A3

公开(公告)日：1999-11-17

申请号：CZ391698

申请日：1997-05-28

Applicant: BASF AG

Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

Abstract: PCT No. PCT/EP97/02763 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 28, 1997 PCT Pub. No. WO97/46528 PCT Pub. Date Dec. 11, 1997The invention relates to a process for reducing the dimerization of piperidines of the formula I where R1 to R4 are C1- to C6-alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain having 2 to 5 carbon atoms, which comprises adding to the piperidine from 0.001 to 0.2% by weight of a reducing agent of the formula MXH4-mYm, where M is an alkali metal, NR4, where R are identical or different C1-C4-alkyl groups, or an equivalent of an alkaline earth metal or an equivalent of zinc, X is boron or aluminum, Y is H or CN and m is 0 or 1. The invention also relates to a mixture of piperidines of the formula I, from 0.001 to 0.2% by weight of a reducing agent and from 1 to 1000 ppm of dimers of the piperidines of the formula I, and to the preparation of hindered amine light stabilizers therefrom.

公开(公告)号：AU711518B2

公开(公告)日：1999-10-14

申请号：AU3168797

申请日：1997-05-28

Applicant: BASF AG

Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

Abstract: PCT No. PCT/EP97/02763 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 28, 1997 PCT Pub. No. WO97/46528 PCT Pub. Date Dec. 11, 1997The invention relates to a process for reducing the dimerization of piperidines of the formula I where R1 to R4 are C1- to C6-alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain having 2 to 5 carbon atoms, which comprises adding to the piperidine from 0.001 to 0.2% by weight of a reducing agent of the formula MXH4-mYm, where M is an alkali metal, NR4, where R are identical or different C1-C4-alkyl groups, or an equivalent of an alkaline earth metal or an equivalent of zinc, X is boron or aluminum, Y is H or CN and m is 0 or 1. The invention also relates to a mixture of piperidines of the formula I, from 0.001 to 0.2% by weight of a reducing agent and from 1 to 1000 ppm of dimers of the piperidines of the formula I, and to the preparation of hindered amine light stabilizers therefrom.

公开(公告)号：NZ332160A

公开(公告)日：1999-09-29

申请号：NZ33216097

申请日：1997-05-30

Applicant: BASF AG

Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

IPC: C07D211/58 ,  C07D211/56 ,  C07D221/20

Abstract: PCT No. PCT/EP97/02822 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 30, 1997 PCT Pub. No. WO97/46529 PCT Pub. Date Dec. 11, 1997A process for purifying crude piperidines of the formula I where R1 to R4 are C1-C6-alkyl, or R1 and R2 and/or R3 and R4 together are a CH2-chain of 2 to 5 carbons, which comprises, in a first step, removing high-boiling substances and, if present, water from the crude piperidines by distillation; in a second step, adding from 0.01 to 5% by weight, based on the product of the first step, as a reducing agent; and, in a third step, isolating the piperidines by distillation.

公开(公告)号：NZ332521A

公开(公告)日：1999-06-29

申请号：NZ33252197

申请日：1997-05-28

Applicant: BASF AG

Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

Abstract: PCT No. PCT/EP97/02763 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 28, 1997 PCT Pub. No. WO97/46528 PCT Pub. Date Dec. 11, 1997The invention relates to a process for reducing the dimerization of piperidines of the formula I where R1 to R4 are C1- to C6-alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain having 2 to 5 carbon atoms, which comprises adding to the piperidine from 0.001 to 0.2% by weight of a reducing agent of the formula MXH4-mYm, where M is an alkali metal, NR4, where R are identical or different C1-C4-alkyl groups, or an equivalent of an alkaline earth metal or an equivalent of zinc, X is boron or aluminum, Y is H or CN and m is 0 or 1. The invention also relates to a mixture of piperidines of the formula I, from 0.001 to 0.2% by weight of a reducing agent and from 1 to 1000 ppm of dimers of the piperidines of the formula I, and to the preparation of hindered amine light stabilizers therefrom.

公开(公告)号：PL330276A1

公开(公告)日：1999-05-10

申请号：PL33027697

申请日：1997-05-28

Applicant: BASF AG

Inventor： JULIUS MANFRED ,  RUST HARALD ,  KRAUSE ALFRED ,  SIEGEL HARDO ,  SIEGEL WOLFGANG ,  WITZEL TOM

IPC: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435

Abstract: PCT No. PCT/EP97/02763 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed May 28, 1997 PCT Pub. No. WO97/46528 PCT Pub. Date Dec. 11, 1997The invention relates to a process for reducing the dimerization of piperidines of the formula I where R1 to R4 are C1- to C6-alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain having 2 to 5 carbon atoms, which comprises adding to the piperidine from 0.001 to 0.2% by weight of a reducing agent of the formula MXH4-mYm, where M is an alkali metal, NR4, where R are identical or different C1-C4-alkyl groups, or an equivalent of an alkaline earth metal or an equivalent of zinc, X is boron or aluminum, Y is H or CN and m is 0 or 1. The invention also relates to a mixture of piperidines of the formula I, from 0.001 to 0.2% by weight of a reducing agent and from 1 to 1000 ppm of dimers of the piperidines of the formula I, and to the preparation of hindered amine light stabilizers therefrom.

公开(公告)号：NO980869A

公开(公告)日：1998-02-27

申请号：NO980869

申请日：1998-02-27

Applicant: BASF AG

Inventor： ARON MAIK ,  RUST HARALD

IPC: C07C27/28 ,  C07C29/80 ,  C07C31/12 ,  C07C41/42 ,  C07C43/04

CPC classification number: C07C41/42 ,  C07C29/80 ,  Y10S203/20 ,  C07C43/04 ,  C07C31/12

公开(公告)号：DE19607955A1

公开(公告)日：1997-09-04

申请号：DE19607955

申请日：1996-03-01

Applicant: BASF AG

Inventor： BAUR KARL GERHARD DR ,  FISCHER ROLF DR ,  PINKOS ROLF DR ,  STEIN FRANK DR ,  RUST HARALD

IPC: C07C29/149 ,  C07C31/20 ,  B01J23/89 ,  C07C29/74

Abstract: A process for the production of 1,6-hexanediol (I) from a carboxylic acid mixture (II) of adipic acid, 6-hydroxycaproic acid and small amounts of cyclohexan-1,4-diol(s) is obtained as by-product of the oxidation of cyclohexane to cyclohexanone/cyclohexanol with (gas containing) oxygen by extraction of the reaction mixture with water. The process involves esterification of the acids and hydrogenation. First, (a) the mono- and dicarboxylic acids in the aqueous (II) are esterified with a low molecular alcohol. This is followed by 2 distillation stages, in which (b) excess alcohol and low-boiling compounds are removed and (c) the sump is separated into an ester fraction free from cyclohexan-1,4-diol(s) and a fraction of (mainly) cyclohexan-1,4-diol(s). Then (d) the ester fraction is hydrogenated catalytically and (e) pure (I) is recovered from the hydrogenation product by distillation.

公开(公告)号：DE19607954A1

公开(公告)日：1997-09-04

申请号：DE19607954

申请日：1996-03-01

Applicant: BASF AG

Inventor： BAUR KARL GERHARD DR ,  FISCHER ROLF DR ,  PINKOS ROLF DR ,  STEIN FRANK DR ,  RUST HARALD

IPC: C07C29/149 ,  C07C29/80 ,  C07C29/88 ,  C07C51/31 ,  C07D315/00 ,  C07D313/04 ,  C07D307/33 ,  C07D309/30

Abstract: A process for the production of 1,6-hexandiol (I) and iota -caprolactone (II) from a carboxylic acid mixture (III) of adipic acid, 6-hydroxycaproic acid and small amounts of cyclohexan-1,4-diol(s) is obtained as by-product of the oxidation of cyclohexane to cyclohexanone/cyclohexanol with (gas containing) oxygen by extraction of the reaction mixture with water. The process involves esterification, hydrogenation of a side stream to (I) and cyclisation of 6-hydroxycaproic ester to (II) by the following stages. First, (a) the mono- and dicarboxylic acids in the aqueous (III) are esterified with a low molecular alcohol. This is followed by 3 distillation stages, in which (b) excess alcohol and low-boiling compounds are removed, (c) the sump is separated into an ester fraction free from cyclohexan-1,4-diol(s) and a fraction of (mainly) cyclohexan-1,4-diol(s), and (d) a stream of (mainly) 6-hydroxycaproic ester is separated from the ester fraction. Then (e) the remaining ester fraction from (d) is hydrogenated catalytically and (I) is recovered from the hydrogenation product by distillation and (f) the 6-hydroxycaproic ester stream is heated to > 200 deg C at low pressure to cyclise the ester to (II), and pure (II) is recovered from the cyclisation product by distillation.

公开(公告)号：DE59203987D1

公开(公告)日：1995-11-16

申请号：DE59203987

申请日：1992-11-27

Applicant: BASF AG

Inventor： FISCHER ROLF DR ,  GOETZ NORBERT DR ,  KUEKENHOEHNER THOMAS DR ,  RUST HARALD ,  SCHNURR WERNER DR

IPC: C07B61/00 ,  C07D309/08