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公开(公告)号：DE59707073D1
公开(公告)日：2002-05-23
申请号：DE59707073
申请日：1997-09-18
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH-GEORG , SCHRAUT ARMIN , WEKERLE JOSEF
Abstract: In the preparation of esters of acrylic or methacrylic acid by esterification with alcohols, the interfering deposits formed on the apparatus parts by relatively high molecular weight by-products can be avoided, removed or lessened by allowing a liquid partly or wholly consisting of the alcohol used for the esterification to act on the deposits, fouled apparatus parts or on the surfaces of the apparatus parts on which deposits are easily formed, with preference being given to wetting the deposits or surfaces using suitable nozzles or cleaning sprayers.
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公开(公告)号：CA2282492A1
公开(公告)日：1998-09-17
申请号：CA2282492
申请日：1998-03-05
Applicant: BASF AG
Inventor： ULBRICH MICHAEL-DIETER , SCHRAUT ARMIN , MARTIN FRIEDRICH-GEORG
Abstract: The invention relates to a method for extracting an aqueous solution containing (meth)acrylic acid. Said solution is brought into contact with a solution containing at least one extracting agent which can be converted into (meth)acrylic acid and forms a miscibility gap with the aqueous solution to produce an organic phase containing (meth)acrylic acid and extraction agent and an aqueous phase.
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公开(公告)号：DE59802649D1
公开(公告)日：2002-02-21
申请号：DE59802649
申请日：1998-06-26
Applicant: BASF AG
Inventor： HENNIG GUNNAR , SCHRAUT ARMIN , MARTIN FRIEDRICH-GEORG , ULBRICH MICHAEL-DIETER , BAUR GERHARD , THIESSEN FRITZ
Abstract: The invention relates to a method for producing alkyl(meth)acrylate by continuous reaction of an aqueous solution containing (meth)acrylic acid obtained directly from gas-phase oxidation by reacting with a straight-chain or branched alkanol with 1 to 6 C atoms or a mixture of two or more thereof in the presence of an esterification catalyst. The inventive method is characterized in that alkanol is introduced into aqueous solution containing (meth)acrylic acid in the form of a gas.
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公开(公告)号：CA2265552A1
公开(公告)日：1998-03-26
申请号：CA2265552
申请日：1997-09-18
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH-GEORG , WEKERLE JOSEF , SCHRAUT ARMIN
Abstract: When producing esters of acrylic or methacrylic acid by esterification with alcohols troublesome deposits of high molecular byproducts build up in parts of the apparatus. Said deposits can be prevented, removed or reduced by applying a liquid in the parts of the apparatus contaminated with deposits or on those surfaces where deposits easily build up. Said liquid is partially or totally made out of the alcohol used for esterification. The moistening is performed preferably by means of appropriate nozzles or cleansing jets.
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公开(公告)号：ID22758A
公开(公告)日：1999-12-09
申请号：ID990963
申请日：1998-03-05
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH GEORG , SCHRAUT ARMIN , ULBRICH MICHAEL DIETER
Abstract: The invention relates to a method for extracting an aqueous solution containing (meth)acrylic acid. Said solution is brought into contact with a solution containing at least one extracting agent which can be converted into (meth)acrylic acid and forms a miscibility gap with the aqueous solution to produce an organic phase containing (meth)acrylic acid and extraction agent and an aqueous phase.
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Patent Agency Ranking
公开(公告)号：CZ9900828A3
公开(公告)日：1999-06-16
申请号：CZ82899
申请日：1997-09-18
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH-GEORG , SCHRAUT ARMIN , WEKERLE JOSEF
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公开(公告)号：BR9808158A
公开(公告)日：2000-03-28
申请号：BR9808158
申请日：1998-03-05
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH-GEORG , SCHRAUT ARMIN , ULBRICH MICHAEL-DIETER
Abstract: The invention relates to a method for extracting an aqueous solution containing (meth)acrylic acid. Said solution is brought into contact with a solution containing at least one extracting agent which can be converted into (meth)acrylic acid and forms a miscibility gap with the aqueous solution to produce an organic phase containing (meth)acrylic acid and extraction agent and an aqueous phase.
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公开(公告)号：ID21820A
公开(公告)日：1999-07-29
申请号：ID990084
申请日：1997-09-18
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH-GEORG , SCHRAUT ARMIN , WEKERLE JOSEF
Abstract: In the preparation of esters of acrylic or methacrylic acid by esterification with alcohols, the interfering deposits formed on the apparatus parts by relatively high molecular weight by-products can be avoided, removed or lessened by allowing a liquid partly or wholly consisting of the alcohol used for the esterification to act on the deposits, fouled apparatus parts or on the surfaces of the apparatus parts on which deposits are easily formed, with preference being given to wetting the deposits or surfaces using suitable nozzles or cleaning sprayers.
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公开(公告)号：AU6827698A
公开(公告)日：1998-09-29
申请号：AU6827698
申请日：1998-03-05
Applicant: BASF AG
Inventor： MARTIN FRIEDRICH-GEORG , SCHRAUT ARMIN , ULBRICH MICHAEL-DIETER
Abstract: The invention relates to a method for extracting an aqueous solution containing (meth)acrylic acid. Said solution is brought into contact with a solution containing at least one extracting agent which can be converted into (meth)acrylic acid and forms a miscibility gap with the aqueous solution to produce an organic phase containing (meth)acrylic acid and extraction agent and an aqueous phase.
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公开(公告)号：BR9810471A
公开(公告)日：2000-09-19
申请号：BR9810471
申请日：1998-06-26
Applicant: BASF AG
Inventor： HENNIG GUNNAR , SCHRAUT ARMIN , MARTIN FRIEDRICH-GEORG , ULBRICH MICHAEL-DIETER , BAUR KARL GERHARD , THIESSEN FRITZ
Abstract: The invention relates to a method for producing alkyl(meth)acrylate by continuous reaction of an aqueous solution containing (meth)acrylic acid obtained directly from gas-phase oxidation by reacting with a straight-chain or branched alkanol with 1 to 6 C atoms or a mixture of two or more thereof in the presence of an esterification catalyst. The inventive method is characterized in that alkanol is introduced into aqueous solution containing (meth)acrylic acid in the form of a gas.
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