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公开(公告)号：JPH101454A
公开(公告)日：1998-01-06
申请号：JP2294797
申请日：1997-02-05
Applicant: BASF AG
Inventor： IFFLAND GABRIELE , DAMS ALBRECHT , WECK ALEXANDER , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , SCHMIDT WILLI , GEISENDOERFER MATTHIAS , DOCKNER TONI
Abstract: PROBLEM TO BE SOLVED: To avoid production of ether which is a by-product from an alkanol in a method for continuously producing an alkyl ester of a (meth)acrylic acid by reacting (meth)acrylic acid with a 1-8C monohydric alkanol in a reaction zone in the presence of an acid esterification catalyst, discharging a product mixture containing the resultant alkyl (meth)acrylate, the catalyst and a by- product having higher boiling point than the alkyl (meth)acrylate and subjecting the alkyl (meth)acrylate to separation by distillation in a separation zone from the mixture. SOLUTION: A product mixture from a reaction zone is fed to a rectifier I and the product mixture discharged in the apparatus is separated into one or more products I containing an alkyl ester of (meth)acrylic acid and product II containing a catalyst by rectification and the product I is fed to other rectifier II and an alkyl ester of (meth)acrylic acid is separated by rectification in the apparatus.
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公开(公告)号：JPH11269127A
公开(公告)日：1999-10-05
申请号：JP1868099
申请日：1999-01-27
Applicant: BASF AG
Inventor： PAULUS WOLFGANG , GEISENDOERFER MATTHIAS
Abstract: PROBLEM TO BE SOLVED: To provide a method for separating an organic phase and an aqueous phase produced by an esterification. SOLUTION: At least one organic polymeric, anionic and water-soluble flocculant is used in a method for the phase separation of an organic-aqueous system containing unreacted residues of a carboxylic acid anhydride, a carboxylic acid or an alcohol used for producing an acrylate, a diacrylate, a (poly)ester acrylate or a (poly)ether acrylate and an acrylate which are substantially monomers. The flocculant is selected from a functional high-molecular weight polymer containing a carboxylic acid, a sulfonic acid, a phosphoric acid and/or a phosphonic acid functional groups and an anionic-modified polyacrylamide is preferred. The anionic flocculant has 4-22 Mda molecular weight.
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公开(公告)号：DE50002520D1
公开(公告)日：2003-07-17
申请号：DE50002520
申请日：2000-08-18
Applicant: BASF AG
Inventor： LEUBE HARTMANN F , LEIDINGER KURT , GEISENDOERFER MATTHIAS , BECK ERICH
Abstract: Production of (meth)acrylate esters by refluxing high-boiling mono- or polyhydric alcohols with (meth)acrylic acid in presence of acid catalyst, entraining agent (I). Production of (meth)acrylate esters by refluxing high-boiling mono- or polyhydric alcohols with (meth)acrylic acid in presence of acid catalyst, entraining agent (I) for water and polymerisation inhibitor, in which (I) is returned to the reaction at a rate such that the mixture boils at essentially constant temperature.
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公开(公告)号：DE19836788B9
公开(公告)日：2007-04-05
申请号：DE19836788
申请日：1998-08-13
Applicant: BASF AG
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公开(公告)号：BR9703409A
公开(公告)日：1999-01-05
申请号：BR9703409
申请日：1997-05-27
Applicant: BASF AG
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Patent Agency Ranking
公开(公告)号：ID15886A
公开(公告)日：1997-08-14
申请号：ID970347
申请日：1997-02-05
Applicant: BASF AG
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公开(公告)号：DE50206163D1
公开(公告)日：2006-05-11
申请号：DE50206163
申请日：2002-05-28
Applicant: BASF AG
Inventor： GEISENDOERFER MATTHIAS , DAMS ALBRECHT , NESTLER GERHARD
IPC: C07C67/54 , C07B61/00 , C07C67/03 , C07C69/54 , C07C213/06 , C07C213/10 , C07C219/08 , C07D211/94
Abstract: The invention relates to a method for producing (meth)acrylic acid esters IV by means of transesterification of a (meth)acrylic acid ester I with an alcohol R 2 OH comprising at least one more carbon atom than the alcohol constituents (R 1 O-) in the (meth)acrylic acid ester I to be subjected to transesterification, in the presence of a catalyst or a catalyst mixture. Either essentially the (meth)acrylic acid ester I is separated and then the catalyst used is separated by distillation (catalyst separation), or the catalyst used is separated by distillation first (catalyst separation), and then essentially the (meth)acrylic acid ester I is separated, from the reaction product of the transesterification. Constituents from the mixture obtained, which have a lower boiling point than the (meth)acrylic acid ester IV, are essentially separated by distillation (separation of constituents at low boiling point), and the (meth)acrylic acid ester IV is then purified by distillation (purification by distillation).
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公开(公告)号：AT242759T
公开(公告)日：2003-06-15
申请号：AT00117813
申请日：2000-08-18
Applicant: BASF AG
Inventor： LEUBE HARTMANN F , LEIDINGER KURT , GEISENDOERFER MATTHIAS , BECK ERICH
Abstract: Production of (meth)acrylate esters by refluxing high-boiling mono- or polyhydric alcohols with (meth)acrylic acid in presence of acid catalyst, entraining agent (I). Production of (meth)acrylate esters by refluxing high-boiling mono- or polyhydric alcohols with (meth)acrylic acid in presence of acid catalyst, entraining agent (I) for water and polymerisation inhibitor, in which (I) is returned to the reaction at a rate such that the mixture boils at essentially constant temperature.
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公开(公告)号：SG74578A1
公开(公告)日：2000-08-22
申请号：SG1997000247
申请日：1997-02-04
Applicant: BASF AG
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公开(公告)号：DE19836788A1
公开(公告)日：2000-02-24
申请号：DE19836788
申请日：1998-08-13
Applicant: BASF AG
Inventor： PAULUS WOLFGANG , BERNHARD LUDWIG , JOHANSSON ASTRID CARINA , HAAS GUENTER , GEISENDOERFER MATTHIAS , BECK ERICH , LEUBE HARTMANN , KUSE REINHOLD , JAEGER ULRICH
Abstract: Process for the recovery of pure, water insoluble alpha , beta -ethylenically unsaturated carboxylic acid esters is carried out in a single step by means of an aqueous base. A process for the recovery of pure, water-insoluble esters of alpha , beta -ethylenically unsaturated carboxylic acids from a mixture containing unreacted carboxylic acids and/or an acid catalyst and optionally a polymerization inhibitor is claimed. The process comprises removal of the impurities in a single extraction step using an aqueous base and separation of the aqueous base and impurities.
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