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11.发明专利
公开(公告)号：SG72705A1
公开(公告)日：2000-05-23
申请号：SG1996010745
申请日：1996-09-27
Applicant: BASF AG
Inventor： EXNER HERBERT , BAUR KARL , DOCKNER TONI , POTTHOFF CHRISTINE , DAMS ALBRECHT
Abstract: The continuous prodn. of alkyl(meth)acrylates (I) by the reaction of (meth)acrylic acid (II) and 1-8C monohydric alcohols (III) in homogeneous liq. phase at elevated temp. in the absence of solvent and in presence of an acid esterification catalyst (IV). The process comprises (a) feeding (II), (III) and (IV) continuously into a reaction zone (RZ), (b) removing (I) after a residence time in the form of an azeotrope contg. water or water and (III) in addn. to (I) at the top of a rectifier column (RC) mounted over the RZ, (c) separating the distillate into an organic phase contg. (I) and aq. phase(s) contg. water, (d) recycling part of the organic phase via the top of the column and opt. returning water to the RZ, (e) separating (I) from the rest of the organic phase and removing part of the reaction mixt. continuously from the RZ. The RZ consists of a cascade of at least two reactors in series, and the outflow from one reactor provides the input flow for the next reactor. Also claimed is an appts. for this process.
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公开(公告)号：BR9713288A
公开(公告)日：1999-10-26
申请号：BR9713288
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , NESTLER GERHARD , DAMS ALBRECHT , FRIED MICHAEL
Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.
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公开(公告)号：BR9711023A
公开(公告)日：1999-08-17
申请号：BR9711023
申请日：1997-08-01
Applicant: BASF AG
Inventor： HEIDA BERND , THIESSEN FRITZ , HAMMON ULRICH , DAMS ALBRECHT
Abstract: PCT No. PCT/EP97/04214 Sec. 371 Date Feb. 4, 1999 Sec. 102(e) Date Feb. 4, 1999 PCT Filed Aug. 1, 1997 PCT Pub. No. WO98/05622 PCT Pub. Date Feb. 12, 1998A process for isolating acrylic acid forward during catalytic gas phase oxidation of propene, which entails separating acrylic acid from the gas phase oxidation reaction using an absorbent containing biphenyl, diphenyl ether or dimethyl phthalate; and extracting acrylic acid from acid water of the gas phase reaction with a solvent containing biphenyl, diphenyl ether or dimethyl phthalate.
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公开(公告)号：AU5485298A
公开(公告)日：1998-06-22
申请号：AU5485298
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD , DAMS ALBRECHT
Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.
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公开(公告)号：CA2262594A1
公开(公告)日：1998-02-12
申请号：CA2262594
申请日：1997-08-01
Applicant: BASF AG
Inventor： HEIDA BERND , HAMMON ULRICH , THIESSEN FRITZ , DAMS ALBRECHT
Abstract: In the production process for acrylic acid through catalytic vapour-phase oxidat ion of propene, acrylic acid is separated from the vapour-phase oxidation reaction mixture by means of an absorbing agent containin g diphenyl, diphenyl ether or dimethyl phthalate and is also extracted from the vapour-phase oxidation acidic water by means of a solven t containing diphenyl, diphenyl ether or dimethyl phthalate.
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Patent Agency Ranking
公开(公告)号：DE59706891D1
公开(公告)日：2002-05-08
申请号：DE59706891
申请日：1997-08-01
Applicant: BASF AG
Inventor： HEIDA BERND , THIESSEN FRITZ , HAMMON ULRICH , DAMS ALBRECHT
Abstract: PCT No. PCT/EP97/04214 Sec. 371 Date Feb. 4, 1999 Sec. 102(e) Date Feb. 4, 1999 PCT Filed Aug. 1, 1997 PCT Pub. No. WO98/05622 PCT Pub. Date Feb. 12, 1998A process for isolating acrylic acid forward during catalytic gas phase oxidation of propene, which entails separating acrylic acid from the gas phase oxidation reaction using an absorbent containing biphenyl, diphenyl ether or dimethyl phthalate; and extracting acrylic acid from acid water of the gas phase reaction with a solvent containing biphenyl, diphenyl ether or dimethyl phthalate.
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公开(公告)号：ES2163671T3
公开(公告)日：2002-02-01
申请号：ES97101728
申请日：1997-02-04
Applicant: BASF AG
Inventor： DAMS ALBRECHT , HERBST HOLGER , AICHINGER HEINRICH , NESTLER GERHARD , EXNER HERBERT , IFFLAND GABRIELE
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公开(公告)号：SG85587A1
公开(公告)日：2002-01-15
申请号：SG1997000250
申请日：1997-02-04
Applicant: BASF AG
Inventor： DAMS ALBRECHT , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , IFFLAND GABRIELE , WECK ALEXANDER
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公开(公告)号：BR9703321A
公开(公告)日：1999-01-05
申请号：BR9703321
申请日：1997-05-27
Applicant: BASF AG
Inventor： ECK BERND , PROLL THEO , DAMS ALBRECHT , MACHHAMMER OTTO
IPC: C07C57/07
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公开(公告)号：CZ9700336A3
公开(公告)日：1998-04-15
申请号：CZ33697
申请日：1997-02-05
Applicant: BASF AG
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