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1.发明专利
公开(公告)号：DE2612355A1
公开(公告)日：1977-10-06
申请号：DE2612355
申请日：1976-03-24
Applicant: BASF AG
Abstract: A Sn, Ti or Zr catalyst used in the esterification of phthalic anhydride or adipic acid with 6-13C alcohols is removed by (1) treatment of the crude ester with aq. alkali at is not >100 degrees C and (2) decanting the aq. hydrolysed catalyst contg. phase. In (I) the neutral or weakly acidic crude ester is treated for >=3 mins. with 5-20 pt. wt. per 100 pt. wt. crude ester of a 0.1-5 wt.% aq. alkali soln. so that an emulsion is formed. The size of the drops in the organic phase is 0.5-10 (0.5-3) mm. Esters of purity >99% are obtd. They are used as plasticisers.
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Patent Agency Ranking
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
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.
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公开(公告)号：DE3106054A1
公开(公告)日：1982-09-02
申请号：DE3106054
申请日：1981-02-19
Applicant: BASF AG
Inventor： BOTT KASPAR DIPL CHEM DR , KAIBEL GERD , HOFFMANN HERWIG DIPL CHEM DR , IRNICH RUDOLF DIPL CHEM DR , KRATZER OTTO DIPL CHEM DR
IPC: C07C231/02 , C07C20060101 , C07C67/00 , C07C231/00 , C07C233/03 , C07C103/127 , C07C102/06
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公开(公告)号：DE2732853A1
公开(公告)日：1979-02-08
申请号：DE2732853
申请日：1977-07-21
Applicant: BASF AG
Inventor： HORNBERGER PAUL DIPL CHEM DR , ENKE WALTER ING GRAD , BIPP HANSJOERG DIPL CHEM DR , KRATZER OTTO DIPL CHEM DR
Abstract: Complete esterification of dicarboxylic acids comprises introducing a mixt. of diester (I), monoester (II), alcohol (III) and esterification catalyst into a column at b.pt. of (III) or a temp. up to 40 degrees C. higher. The liq. mixt. passes up the flooded column in the same direction as water and alcohol vapour. The rise speed of the vapour bubbles is reduced, and water and (III) are removed as overhead, while crude (I) is taken off as a side-stream below the column head. The starting mixt. comprises 50-70 wt. % (ROOC)2A (A=1,2-phenylene or (CH2)4; R=4-11C alkyl); 3-15% HOOC.R.COOR; 27-35% ROH, and 0.05-0.1 wt. % catalyst. No azeotropic agent is needed to remove the water and a uniform temp. profile and constant boiling conditions are maintained in the column, so fractionation is avoided. Back-saponification of the prodn. does not occur.
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公开(公告)号：DE3037089A1
公开(公告)日：1982-05-06
申请号：DE3037089
申请日：1980-10-01
Applicant: BASF AG
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公开(公告)号：DE2324165A1
公开(公告)日：1974-11-21
申请号：DE2324165
申请日：1973-05-12
Applicant: BASF AG
Inventor： KRATZER OTTO DIPL CHEM DR , BIPP HANSJOERG DIPL CHEM DR
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