公开(公告)号：ID18460A

公开(公告)日：1998-04-09

申请号：ID973144

申请日：1997-09-10

Applicant: BASF AG

Inventor： LUYKEN HERMAN ,  REHFINGER ALWIN ,  BASSLER PETER ,  VOIT GUIDO ,  FISCHER ROLF ,  MERGER MARTIN ,  RUST HARALD

IPC: C07C209/86 ,  C07C211/12 ,  C07C211/36 ,  C07C209/82

Abstract: A process for separating 2-aminomethylcyclopentylamine from a mixture consisting of hexamethylenediamine and 2-aminomethylcyclopentylamine by distilling the mixture at a pressure from 1 to 300 mbar.

公开(公告)号：NO980869D0

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 ,  C07C

Abstract: PCT No. PCT/EP96/03762 Sec. 371 Date Feb. 17, 1998 Sec. 102(e) Date Feb. 17, 1998 PCT Filed Aug. 26, 1995 PCT Pub. No. WO97/08120 PCT Pub. Date Mar. 6, 1997Butanol and dibutyl ether are separated from a mixture containing water, dibutyl ether and n-butanol, 2-butanol and/or isobutanol by a process in which a) the mixture is introduced into a first distillation column, essentially butanol is separated off at the bottom of this distillation column and the mixture taken off at the top of the distillation column b) is introduced into a second distillation column and essentially dibutyl ether is separated off at the bottom of this second distillation column and the mixture formed at the top of the second distillation column is removed, c) the second distillation column being operated at a higher pressure than the first distillation column and at least one of the two mixtures taken off via the top of the distillation columns being subjected to phase separation, only the organic phase separated off being fed to the second distillation column in the case of phase separation downstream of the first distillation column, and separation into an aqueous and an organic phase also being effected in the case of phase separation downstream of the second distillation column, a part stream being recycled from the top or rectification section of the second distillation column to the first distillation column.

公开(公告)号：CA2257095A1

公开(公告)日：1997-12-11

申请号：CA2257095

申请日：1997-05-30

Applicant: BASF AG

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

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

Abstract: A process for purifying raw piperidines of formula (I), where R1 to R4 are C1 to C6 alkyl, R1 and R2 and/or R3 and R4 together are a CH2 chain with 2 to 5 C atoms. Said process is characterized in that in an initial step high-boiling-point substances and possible water are eliminated by distillation from the raw piperidines, in a second step 0.01 to 5 wt %, in relation to the product of the first step, of a reducing agent are added and in a third step the piperidines are isolated by distillation.

公开(公告)号：ID17018A

公开(公告)日：1997-12-04

申请号：ID971894

申请日：1997-06-03

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：DE59500903D1

公开(公告)日：1997-12-04

申请号：DE59500903

申请日：1995-07-31

Applicant: BASF AG

Inventor： RUEHL THOMAS DR ,  HEIDER MARC DR ,  HENKELMANN JOCHEM DR ,  RAHN RALF-THOMAS DR ,  RUST HARALD

IPC: C07C67/54 ,  C07C69/01 ,  C07C69/06 ,  C07C69/07

Abstract: Recovery of pure vinyl formate (I) by distn. to separate by-prodn. from synthesis is carried out in two stages, HCOOH and water being sepd. in stage one and CH3CHO in stage two.

公开(公告)号：DE19622269A1

公开(公告)日：1997-12-04

申请号：DE19622269

申请日：1996-06-03

Applicant: BASF AG

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

IPC: C07D211/58 ,  C07D211/56 ,  C07D221/20 ,  C07D213/73

Abstract: A process for purifying raw piperidines of formula (I), where R to R are C1 to C6 alkyl, R and R and/or R and R together are a CH2 chain with 2 to 5 C atoms. Said process is characterized in that in an initial step high-boiling-point substances and possible water are eliminated by distillation from the raw piperidines, in a second step 0.01 to 5 wt %, in relation to the product of the first step, of a reducing agent are added and in a third step the piperidines are isolated by distillation.

公开(公告)号：AU6928996A

公开(公告)日：1997-03-19

申请号：AU6928996

申请日：1996-08-26

Applicant: BASF AG

Inventor： ARON MAIK ,  RUST HARALD

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

Abstract: PCT No. PCT/EP96/03762 Sec. 371 Date Feb. 17, 1998 Sec. 102(e) Date Feb. 17, 1998 PCT Filed Aug. 26, 1995 PCT Pub. No. WO97/08120 PCT Pub. Date Mar. 6, 1997Butanol and dibutyl ether are separated from a mixture containing water, dibutyl ether and n-butanol, 2-butanol and/or isobutanol by a process in which a) the mixture is introduced into a first distillation column, essentially butanol is separated off at the bottom of this distillation column and the mixture taken off at the top of the distillation column b) is introduced into a second distillation column and essentially dibutyl ether is separated off at the bottom of this second distillation column and the mixture formed at the top of the second distillation column is removed, c) the second distillation column being operated at a higher pressure than the first distillation column and at least one of the two mixtures taken off via the top of the distillation columns being subjected to phase separation, only the organic phase separated off being fed to the second distillation column in the case of phase separation downstream of the first distillation column, and separation into an aqueous and an organic phase also being effected in the case of phase separation downstream of the second distillation column, a part stream being recycled from the top or rectification section of the second distillation column to the first distillation column.

公开(公告)号：DE19509362A1

公开(公告)日：1996-09-19

申请号：DE19509362

申请日：1995-03-15

Applicant: BASF AG

Inventor： SCHMIDT-RADDE MARTIN DR ,  HEIDER MARC DR ,  DAMS ALBRECHT DR ,  RUST HARALD

IPC: C07D207/26 ,  C07D207/267 ,  C07D211/76 ,  C07D223/10 ,  C07B43/06

Abstract: Prepn. of N-vinyl-lactams (I) of formula (A) (where R = CH=CH2; n=1-3) comprises reacting lactams (II) of formula (A) (where R = H; n = 1-3) with (a) 10-90 wt.% aq. alkali hydroxide soln. by distn. at 50-250 degrees C and 1-100 mbar with a residence time of 0.1-5 hrs. and then (b) C2H2 at 60-250 degrees C and 1-100 bar. Pref. reaction (a) is carried out in a column with at least 2 theoretical plates. (II) and aq. alkali hydroxide soln. are fed into the upper third of the column. A 30-60, esp. 45-55 wt.% soln., more esp. KOH soln., is used. Reaction is carried out at 70-180 degrees C and 1-30 mbar with a residence time of 0.5-2 hrs.

公开(公告)号：ES2086142T3

公开(公告)日：1996-06-16

申请号：ES93101992

申请日：1993-02-09

Applicant: BASF AG

Inventor： GOSCH HANS-JURGEN DR ,  RUST HARALD ,  FISCHER ROLF DR ,  HECHLER CLAUS DR ,  PINKOS ROLF DR

IPC: C07C29/80 ,  C07C29/82 ,  C07C31/20

Abstract: A process for isolating 1,4-butanediol from mixtures obtained by catalytic hydrogenation of maleic acid esters, fumaric acid esters and/or succinic acid esters, which in addition to 1,4-butanediol contain tetrahydrofuran, water, C1-C4-alcohols, succinic acid diesters, hydroxybutyric acid esters, succinic acid alkyl hydroxyalkyl esters, gamma-butyrolactone and butyric acid esters.

公开(公告)号：DE4428303A1

公开(公告)日：1996-02-15

申请号：DE4428303

申请日：1994-08-10

Applicant: BASF AG

Inventor： RUEHL THOMAS DR ,  HEIDER MARC DR ,  HENKELMANN JOCHEM DR ,  RAHN RALF-THOMAS DR ,  RUST HARALD

IPC: C07C67/54 ,  C07C69/01 ,  C07C69/06 ,  C07C69/07

Abstract: Recovery of pure vinyl formate (I) by distn. to separate by-prodn. from synthesis is carried out in two stages, HCOOH and water being sepd. in stage one and CH3CHO in stage two.