公开(公告)号：DE3867704D1

公开(公告)日：1992-02-27

申请号：DE3867704

申请日：1988-05-07

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG DR ,  MERGER FRANZ DR ,  LERMER HELMUT DR

IPC: C07C45/60 ,  C07C47/198 ,  C07C47/277 ,  C07D335/02

Abstract: Prodn. of 4-oxa-aldehydes of formula (I) comprises isomerising the 1,3-dioxan deriv. (II) over a phosphate catalyst. R1,R2,R4 and R5 = H; opt. branched 1-18C alkyl, alkenyl or alkynyl; 5-8C cycloalkyl or cycloalkenyl; 5-16C aryl, alkary, aralkyl or alkenylaryl, or heterocyclyl, or R1 plus R2 and/or R4 plus R5 together complete a cycloalkane, cycloalkene or heterocycle, all these gps. may carry substits. which are inert under reaction conditions; R3 = H or opt. branched alkyl. .

公开(公告)号：DE3771657D1

公开(公告)日：1991-08-29

申请号：DE3771657

申请日：1987-10-30

Applicant: BASF AG

Inventor： LERMER HELMUT DR ,  HOELDERICH WOLFGANG DR ,  SCHWARZMANN MATTHIAS DR

IPC: B01J29/04 ,  B01J29/40 ,  C07C45/48 ,  C07C45/54 ,  C07C49/395

Abstract: Cyclopentanone is prepared from adipic esters by reacting adipic esters of the formula R1OOC-(CH2)4-COOR2 where R1 and R2 are alkyl of 1 to 12 carbon atoms, cycloalkyl of 5 or 6 carbon atoms, aralkyl or aryl and R2 can additionally be hydrogen, in the gas or liquid phase at from 150 DEG C. to 450 DEG C. in the presence of zeolitic catalysts and/or phosphate catalysts, preferably zeolites of the pentasil type.

公开(公告)号：DE3927916A1

公开(公告)日：1991-02-28

申请号：DE3927916

申请日：1989-08-24

Applicant: BASF AG

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

公开(公告)号：DE3903622A1

公开(公告)日：1990-08-09

申请号：DE3903622

申请日：1989-02-08

Applicant: BASF AG

Inventor： HESSE MICHAEL DR ,  LERMER HELMUT DR ,  STECK WERNER DR ,  FISCHER ROMAN DR ,  MUELLER HERBERT DR ,  SCHARF EMIL DR

IPC: C07D487/08

公开(公告)号：DE3843389A1

公开(公告)日：1990-06-28

申请号：DE3843389

申请日：1988-12-23

Applicant: BASF AG

Inventor： HESSE MICHAEL DR ,  LERMER HELMUT DR ,  STECK WERNER DR ,  SCHAPER MICHAEL DR

IPC: C07D307/62

Abstract: Process for the preparation of ascorbic acid, of the formula I, which is characterised in that 2-keto-L-gulonic acid derivatives of the formula II in which R can denote H, alkyl or aryl, are reacted in the presence of zeolites as catalysts.

公开(公告)号：DE3662140D1

公开(公告)日：1989-03-30

申请号：DE3662140

申请日：1986-11-22

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG DR ,  HOFFMANN HERWIG DR ,  LERMER HELMUT DR

IPC: C07C2/12 ,  C07C11/02

公开(公告)号：DE3634260A1

公开(公告)日：1988-04-21

申请号：DE3634260

申请日：1986-10-08

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG DR ,  SCHNEIDER KURT DR ,  LERMER HELMUT DR ,  BEST WALTER DR

IPC: C07D487/08 ,  B01J27/14 ,  B01J27/18

Abstract: The invention relates to a process for the preparation of 1,4-diazabicyclo[2.2.2]octane and C-substituted 1,4-diazabicyclo[2.2.2]octanes of the formula (I) in which R and R can denote hydrogen radicals, alkyl radicals having from 1 to 4 C atoms or alkenyl radicals having from 1 to 4 C atoms, by reacting heterocyclic amines of the formula (II) in which R and R have the abovementioned meaning and R denotes hydrogen, hydroxyethyl or aminoethyl radicals and X denotes hydroxyl, amino, hydroxyethyl or aminoethyl radicals, in the presence of phosphates which have a zeolite structure as catalysts.

公开(公告)号：CZ285212B6

公开(公告)日：1999-06-16

申请号：CZ247694

申请日：1994-10-07

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  NESTLER GERHARD DR ,  HERBST HOLGER DR ,  LERMER HELMUT DR ,  MARTAN HANS DR ,  VOGEL HERBERT DR ,  EXNER HERBERT DR

IPC: C07C57/04 ,  C07C51/487 ,  C07C57/055 ,  C07C57/07 ,  C07C57/075

Abstract: A process for the purification of crude (meth)acrylic acid in which the crude (meth)acrylic acid is worked up by distillation after addition of a primary amine compound and of an organic sulphonic acid.

公开(公告)号：DE59505830D1

公开(公告)日：1999-06-10

申请号：DE59505830

申请日：1995-09-30

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

IPC: C07C57/07 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54

Abstract: In the sepn. of a di(meth)acrylate (I) of a 4-6 C alkandiol (II) from a mixt. of (II), the mono(meth) acrylate (III) and (I) by extn. with an organic solvent (IV) in the presence of water, the mixt. contg. (I) is supplied to the middle of an extn. column and water and (V) are passed through the column in countercurrent. Also claimed is the prepn. (III), esp. butan-1,4-diol monoacrylate (IIIA).

公开(公告)号：DK0706990T3

公开(公告)日：1999-02-08

申请号：DK95115503

申请日：1995-09-30

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

IPC: B01D11/04 ,  C07B61/00 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54

Abstract: In the prepn. of a mono(meth)acrylate (I) of a 4-6 C alkandiol (II) from an aq. soln. contg. (I) and (II) by solvent extn., the organic solvent used for extn. is selected from esters (III) of 1-4 C alkanecarboxylic acids and 1-5 C alkanols, simple and mixed 4-8 C dialkyl ethers (IV) and mixts. of these. Also claimed is a method of prepn. and sepg. (I).