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    64.
    发明专利
    未知

    公开(公告)号：NO980869L

    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

    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.

    PROCESS FOR PREPARING 1,6 HEXANEDIOL AND CAPROLACTON
    66.
    发明专利
    PROCESS FOR PREPARING 1,6 HEXANEDIOL AND CAPROLACTON 未知

    公开(公告)号：CA2248004A1

    公开(公告)日：1997-09-04

    申请号：CA2248004

    申请日：1997-02-28

    Applicant: BASF AG

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

    IPC: C07D313/04 ,  C07C27/12 ,  C07C29/149 ,  C07C29/80 ,  C07C29/88 ,  C07C31/20 ,  C07C31/27 ,  C07C51/31 ,  C07D315/00

    Abstract: The invention relates to a process for preparing 1,6 hexane diol and .epsilon.caprolacton from a carboxylic acid mixture containing adipic acid, 6-hydroxy caproic acid and, in small quantities, 1,4 cyclohexane diols. Said mixture is obtained as a by-product of the oxidation of cyclohexane into cyclohexanone/ cyclohexanol with oxygen or gases containing oxygen, by water extraction of the reaction mixture. Said process involves esterification and hydrogenation of a partial stream into hexane diol and cyclization of 6-hydroxy caproic acid esters into caprolacton. According to this process: (a) the monocarboxylic acids and the dicarboxylic acids contained in the aqueous reaction mixture are reacted with a low-molecular alcohol to form the corresponding carboxylic acid esters; (b) the excess alcohol, water and low-boiling agents of the resultant esterification mixture are released in a first distillation stage; (c) separating into a ester fraction substantially free of 1,4 cyclohexane diols, and a fraction containing at least the greater part of the 1,4 cyclohexane diols is carried out from the bottom product in a second distillation stage; (d) at least part of a stream substantially containing 6-hydroxy caproic acid ester is separated from the ester fraction in a third distillation stage; (e) the ester fraction from (d), from which 6-hydroxy caproic acid ester was at least partially removed, is hydrogenated catalytically and 1,6 hexane diol is extracted by distilling the hydrogenated product in a known manner; and (f) the stream substantially containing 6-hydroxy caproic acid ester is heated to temperatures above 200 ~C at reduced pressure, thereby causing cyclization of 6-hydroxy caproic acid ester to form caprolacton, and pure .epsilon.caprolacton is recovered from the cyclization product by distillation.

    SEPARATING OFF BUTANOL AND DIBUTYL ETHER WITH THE AID OF A TWO-PRESSURE DISTILLATION
    67.
    发明专利
    SEPARATING OFF BUTANOL AND DIBUTYL ETHER WITH THE AID OF A TWO-PRESSURE DISTILLATION 未知

    公开(公告)号：CA2227280A1

    公开(公告)日：1997-03-06

    申请号：CA2227280

    申请日：1996-08-26

    Applicant: BASF AG

    Inventor： RUST HARALD ,  ARON MAIK

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

    Abstract: A process for separating butanol and dibutyl ether from a mixture containing water, dibutyl ether and n-butanol, 2-butanol and/or iso-butanol, in which: a) the mixture is introduced into a first distillation column, butanol is essentially separated in its sump and the mixture drawn from the top of the distillation column is b) introduced into a second distillation column and essentially dibutyl ether is separated off in its sump and the mixture form at its top is drawn off, whereby c) the second distillation column is operated at a higher pressure than the first and at least one of the two mixtures drawn off from the head of the distillation columns is taken to a phase separation, where in the case of phase separation behind the first distillation column, only the separated organic phase is taken to the second column and, in the case of phase separation behind the second column, the phases are separated into an aqueous and an organic phase and a partial flow from the head or concentration section of the second distillation column is fed back into the first column.

    68.
    发明专利
    未知

    公开(公告)号：ES2055837T3

    公开(公告)日：1994-09-01

    申请号：ES90115637

    申请日：1990-08-16

    Applicant: BASF AG

    Inventor： STECK WERNER DR ,  RUST HARALD ,  LERMER HELMUT DR ,  FRITZ NAEUMANN DR

    IPC: C07C253/34 ,  C07C255/50

    Abstract: A process for the separation of ortho-, meta- and para-tolunitrile from ternary mixtures of isomers entails removing ortho-tolunitrile from these mixtures by distillation under pressures of from 102 and 105 Pa and with a reflux ratio of from 1:1 to 200:1, and distilling the remaining binary mixture of meta- and para-tolunitrile to concentrate to more than 75 mol-% para-tolunitrile, and freezing out the paratolunitrile at below 26 DEG C., and a process for the preparation of suitable ternary mixtures of isomers entails isomerization of pure ortho-, meta- or para-tolunitrile or mixtures thereof at from 380 DEG to 580 DEG C. on zeolite catalysts.

    70.
    发明专利
    未知

    公开(公告)号：AT330923T

    公开(公告)日：2006-07-15

    申请号：AT00985231

    申请日：2000-12-21

    Applicant: BASF AG

    Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  RUST HARALD ,  SCHULZ GERHARD

    IPC: C07B61/00 ,  C07C29/80 ,  C07C31/22 ,  C07C29/141

    Abstract: A process is disclosed for the purification, by distillation, of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal, said process including the following steps:(a) reaction of n-butyraldehyde with formaldehyde in the presence of catalytic amounts of a tertiary amine, and hydrogenation of the resulting mixture to give a mixture containing trimethylolpropane;(b) separation of water, methanol, trialkylamine and/or trialkylammonium formate by distillation;(c) heating of the residue obtained in (b) under reduced pressure to a temperature at which TMP is volatile and compounds boiling above TMP are cleaved, in order to separate off, by distillation, TMP and compounds more volatile than TMP;(d) distillation of the distillate obtained in (c) in order to separate off the more volatile compounds and recover pure TMP; and(e) optional distillation of the TMP obtained in (d) in order to recover TMP with a low APHA color index.A process is also disclosed in which trialkylammonium formate is distilled under mild conditions from crude mixtures of polyhydric alcohols, predominantly trimethylolpropane.

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