公开(公告)号：DE3126111A1

公开(公告)日：1983-01-20

申请号：DE3126111

申请日：1981-07-02

Applicant: BASF AG

Inventor： KIENER VOLKER DIPL CHEM DR ,  BITTLER KNUT DIPL CHEM DR ,  KAIBEL GERD DIPL ING ,  HARTMANN HORST

IPC: C07F5/04

Abstract: Trimethyl borate can be isolated in pure form from methanol-containing mixtures, such as arise during the esterification of boric acid with methanol, by extractive distillation using, for example, dimethylformamide.

公开(公告)号：DE3045081A1

公开(公告)日：1982-07-01

申请号：DE3045081

申请日：1980-11-29

Applicant: BASF AG

Inventor： HARTMANN HORST ,  HOCHSTEIN WALDHELM DIPL CHEM D ,  KAIBEL GERD DIPL ING ,  MUELLER FRANZ-JOSEF DIPL CHEM

IPC: C07C27/00 ,  C07C27/30 ,  C07C51/46 ,  C07C51/573 ,  C07C53/08 ,  C07C53/12 ,  C07C67/00 ,  C07C67/54 ,  C07C69/14 ,  C07C69/15 ,  C07C69/16 ,  C07C27/22

公开(公告)号：DE2714590A1

公开(公告)日：1978-10-05

申请号：DE2714590

申请日：1977-04-01

Applicant: BASF AG

Inventor： KAIBEL GERD DIPL ING ,  NISSEN AXEL DIPL CHEM DR

IPC: C07C43/30

Abstract: Prepn. of acetals by reaction of aldehydes with alcohols is carried out in the presence of a distillable acid in a reactor comprising a rectification column, the top of which is equipped with a water trap (e.g. a phase separator or reflux separator). The prods. are useful as intermediates for the prodn. of plastics, additives, perfumes and vitamins, 1,1-bis(3-methyl-2-buten-1-yloxy)-3-methyl-2-butene (I) is an intermediate for vitamins A and E. The process gives practically quantitative aldehyde conversions with high selectivity (generally >97%) for the acetal. The use of chemical additives (e.g. dehydrating agents or azeotroping solvents) is avoided. In an example, (I) is prepd. from 3-methyl-2-buten-1-al and 3-methyl-2-buten-1-ol.

公开(公告)号：DE2625074A1

公开(公告)日：1977-12-08

申请号：DE2625074

申请日：1976-06-04

Applicant: BASF AG

Inventor： NISSEN AXEL DIPL CHEM DR ,  KAIBEL GERD DIPL ING

IPC: C07C20060101 ,  C07C43/30

Abstract: Prepn. of acetals by reaction of aldehydes with alcohols is carried out in the presence of a distillable acid in a reactor comprising a rectification column, the top of which is equipped with a water trap (e.g. a phase separator or reflux separator). The prods. are useful as intermediates for the prodn. of plastics, additives, perfumes and vitamins, 1,1-bis(3-methyl-2-buten-1-yloxy)-3-methyl-2-butene (I) is an intermediate for vitamins A and E. The process gives practically quantitative aldehyde conversions with high selectivity (generally >97%) for the acetal. The use of chemical additives (e.g. dehydrating agents or azeotroping solvents) is avoided. In an example, (I) is prepd. from 3-methyl-2-buten-1-al and 3-methyl-2-buten-1-ol.

公开(公告)号：DE3571026D1

公开(公告)日：1989-07-20

申请号：DE3571026

申请日：1985-03-21

Applicant: BASF AG

Inventor： BOTT KASPAR DR ,  KAIBEL GERD DIPL ING ,  MITTELSTAEDT ERICH DIPL ING ,  IRNICH RUDOLF DR

IPC: C07C51/00 ,  B01J31/02 ,  C07B61/00 ,  C07C27/02 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C51/56 ,  C07C53/02 ,  C07C67/00

公开(公告)号：DE3135280A1

公开(公告)日：1983-03-24

申请号：DE3135280

申请日：1981-09-05

Applicant: BASF AG

Inventor： ECKHARDT HEINZ DIPL CHEM DR ,  HALBRITTER KLAUS DIPL CHEM DR ,  KAIBEL GERD DIPL ING ,  HARTMANN HORST

IPC: C07C67/58 ,  C07C69/06

Abstract: Isolation of methanol-free, or practically methanol-free, methyl formate from its mixtures with methanol, by subjecting these mixtures to an extractive distillation using a liquid, polyhydric alcohol and separating off the methanol-free methyl formate as the top fraction of this distillation.

公开(公告)号：DE3019766A1

公开(公告)日：1981-12-03

申请号：DE3019766

申请日：1980-05-23

Applicant: BASF AG

Inventor： KAIBEL GERD DIPL ING ,  HARTMANN HORST ,  HOCHSTEIN WALDHELM DIPL CHEM D ,  MUELLER FRANZ-JOSEF DIPL CHEM

IPC: B01D3/36 ,  C07C7/05 ,  C07C9/15 ,  C07C27/00 ,  C07C29/80 ,  C07C29/84 ,  C07C31/02 ,  C07C31/04 ,  C07C31/08 ,  C07C67/00 ,  C07C67/54 ,  C07C69/14 ,  B01D3/34

Abstract: Liquid mixtures containing aliphatic alcohols are separated, by distillation, into a higher-boiling alcohol-containing fraction and a lower-boiling fraction containing the other liquids, by carrying out the fractionation in the presence of water and of an alkanal and, over about 3/4 of the column height, in the presence of a non-volatile or only slightly volatile acid.

公开(公告)号：DE2853991A1

公开(公告)日：1980-07-03

申请号：DE2853991

申请日：1978-12-14

Applicant: BASF AG

Inventor： BOTT KASPAR DIPL CHEM DR ,  KAIBEL GERD DIPL ING ,  HOFFMANN HERWIG DIPL CHEM DR ,  KRATZER OTTO DIPL CHEM DR ,  IRNICH RUDOLF DIPL CHEM DR

IPC: C07C53/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00 ,  C07C51/42

Abstract: A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column having an upper fractionating section, a middle hydrolysis section and a lower extraction section and in which (a) the hydrolysis is carried out in the middle section of the columm, with water and methyl formate in countercurrent, (b) the resulting formic acid is extracted, in the lower section of the column, by means of a carboxylic acid amide which is fed into the lower end of the middle section of the column, (c) the extract phase, consisting in the main of formic acid and the carboxylic acid amide, is distillatively dehydrated, or substantially dehydrated, in the lower section of the column, (d) the methanol and uncovered methyl formate are removed by fractional distillation in the upper section of the column and (e) the pure formic acid or concentrated aqueous formic acid is distilled from the anhydrous or substantially anhydrous extract phase in a second column, leaving the carboxylic acid amide.

公开(公告)号：DE2749754A1

公开(公告)日：1979-05-10

申请号：DE2749754

申请日：1977-11-07

Applicant: BASF AG

Inventor： FISCHER KARL DR ,  HIMMELE WALTER DR ,  KAIBEL GERD DIPL ING ,  BARL MANFRED DR ,  SCHNEIDER KURT DR

IPC: C07C68/06 ,  C07C68/08 ,  C07C69/96

Abstract: In the prodn. of carbonate esters (I) of the formula O=C(-O-R)2 (in which R is an organic radical with at least 2C) by ester interchange of dimethyl carbonate (II) with an alcohol R-OH, the MeOH formed is removed azeotropically with a 5-8C (cyclo)paraffin. The process is economical and does not necessitate the use of special conditions. (I) are intermediates for the prodn. of pharmaceuticals and plant protection agents.

公开(公告)号：DE3138423A1

公开(公告)日：1983-04-14

申请号：DE3138423

申请日：1981-09-26

Applicant: BASF AG

Inventor： AQUILA WERNER DIPL CHEM DR ,  NISSEN AXEL DIPL CHEM DR ,  KAIBEL GERD DIPL ING ,  HORNER MICHAEL DIPL CHEM DR ,  REBAFKA WALTER DIPL CHEM DR

IPC: A61K8/33 ,  A61Q13/00 ,  B01D3/34 ,  B01D3/38 ,  C07B31/00 ,  C07B63/00 ,  C07C27/00 ,  C07C29/141 ,  C07C29/80 ,  C07C31/04 ,  C07C33/025 ,  C07C45/00 ,  C07C45/82 ,  C07C47/21 ,  C07C67/00 ,  C11B9/00 ,  C11B9/02 ,  A61K7/46

Abstract: Distillative separation of liquid mixtures of one or more water-insoluble substances which have boiling points higher than that of water and one or more substances which have boiling points lower than that of water or which form azeotropes having boiling points lower than that of water, wherein the mixture to be distilled is mixed with a quantity of water such that the boiling point of the water under the pressure applied limits the bottom temperature of the mixture of substances to be separated.