公开(公告)号：TR9901895T2

公开(公告)日：2000-04-21

申请号：TR9901895

申请日：1998-01-17

Applicant: BASF AG

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

IPC: C07C255/24 ,  C07C253/34

CPC classification number: C07C253/34 ,  C07C255/24

公开(公告)号：CZ9902750A3

公开(公告)日：1999-12-15

申请号：CZ275099

申请日：1998-01-17

Applicant: BASF AG

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

IPC: C07C255/24 ,  C07C253/34

CPC classification number: C07C253/34 ,  C07C255/24

公开(公告)号：DE19814457A1

公开(公告)日：1999-10-07

申请号：DE19814457

申请日：1998-04-01

Applicant: BASF AG

Inventor： BAIER MICHAEL ,  RUST HARALD ,  POEPEL WOLFGANG JUERGEN

IPC: C07C5/333 ,  C07C7/05 ,  C07C15/50 ,  C07C7/04 ,  C07C15/18 ,  C07C15/52

Abstract: In the production of 1,1-diphenylethylene (I) from the distillation residue obtained in the recovery of pure ethylbenzene produced by Friedel-Crafts alkylation of benzene with ethylene. In the production of 1,1-diphenyl ethylene: (i) the residue is enriched to a diphenylethane (II) content >= 75 wt.% by distillation in the presence of a base and optionally a free radical polymerization inhibitor; (ii) the enriched mixture is dehydrogenated over a catalyst containing iron; and (iii) (I) is isolated by distillation, optionally with addition an ancillaries.

公开(公告)号：BR9609996A

公开(公告)日：1999-07-06

申请号：BR9609996

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：CZ79699A3

公开(公告)日：1999-06-16

申请号：CZ79699

申请日：1997-08-28

Applicant: BASF AG

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

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

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：PL330278A1

公开(公告)日：1999-05-10

申请号：PL33027897

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：DE19706526A1

公开(公告)日：1998-08-20

申请号：DE19706526

申请日：1997-02-19

Applicant: BASF AG

Inventor： GEHRER EUGEN DR ,  HEIDEMANN THOMAS DR ,  RUST HARALD ,  SCHAEFER HANS DIETER

IPC: C07C2/66 ,  C07C45/36 ,  C07C49/784 ,  B01J27/198 ,  C07C2/04 ,  C07C15/16 ,  C07C45/28 ,  C07C49/786

公开(公告)号：DE19647348A1

公开(公告)日：1998-05-20

申请号：DE19647348

申请日：1996-11-15

Applicant: BASF AG

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

IPC: C07C29/149 ,  C07C31/20 ,  C07C29/136 ,  C07C29/74 ,  C07C29/80 ,  C07C29/88

Abstract: A process for the production of 1,6-hexandiol (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：AU3168797A

公开(公告)日：1998-01-05

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：DE19622268C1

公开(公告)日：1997-10-23

申请号：DE19622268

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: C07B63/04 ,  C07D211/58 ,  C07D211/72 ,  C07D221/20 ,  C08K5/3435 ,  C09D5/32

Abstract: A process for reducing the dimerisation of piperidines of formula (I), in which R -R = 1-6C alkyl, or R /R or R /R together may form a CH2 chain with 2-5 C atoms. The process comprises adding to (I) 0.001-0.2 wt% of a reducing agent of formula MXH4-mYm (III), in which M = alkali metal, NR4 (with R = 1-4C alkyl) or one equivalent of alkaline earth metal or zinc; X = boron or aluminium; Y = H or CN; m = 0 or 1. Also claimed is a mixture containing (A) a piperidine of formula (I), (B) 1-1000 ppm of a compound of formula (II) and (C) 0.001-0.2 wt% reducing agent (III).