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公开(公告)号：CZ33697A3
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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公开(公告)号：CZ9700436A3
公开(公告)日：1997-09-17
申请号：CZ43697
申请日：1997-02-12
Applicant: BASF AG
Inventor： MACHHAMMER OTTO , DAMS ALBRECHT , ECK BERND , PROLL THEO
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公开(公告)号：CZ43697A3
公开(公告)日：1997-09-17
申请号：CZ43697
申请日：1997-02-12
Applicant: BASF AG
Inventor： MACHHAMMER OTTO , DAMS ALBRECHT , ECK BERND , PROLL THEO
Abstract: A process for purifying (meth)acrylic acid by phase separation techniques comprises the following steps: (a) a mixture containing (meth)acrylic acid is separated into distinct phases in the presence of an organic solvent, with the composition of the (meth)acrylic acid-rich phase remaining essentially unchanged, and this acid-rich phase is separated; (b) the remaining phase from step (a) is separated into indistinct phases; and (c) one of the phases from step (b) is returned to step (a). Also claimed is preparation of (meth)acrylic acid. Preferably in step (c) the acid-rich phase is returned to step (a). 1-100 (100) wt.% of the phase remaining from step (a) is used in step (b). Pure end product is added to steps (a) and (b). Step (a) involves crystallisation, freezing or sublimation, preferably static and/or dynamic crystallisation, and most preferably a combined static and dynamic crystallisation in which the residue from the dynamic crystallisation is added to the static crystallisation step and the crystallised product from the static crystallisation is returned to the dynamic crystallisation.
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公开(公告)号：CZ298267B6
公开(公告)日：2007-08-08
申请号：CZ43697
申请日：1997-02-12
Applicant: BASF AG
Inventor： MACHHAMMER OTTO , DAMS ALBRECHT , ECK BERND , PROLL THEO
Abstract: Postup prípravy kyseliny (meth)akrylové zahrnující následující stupne: (I) katalytickou oxidaci propenu nebo izobutenu a/nebo akroleinu nebo methakroleinu v plynné fázi na kyselinu (meth)akrylovou zavzniku plynného reakcního produktu obsahujícího kyselinu (meth)akrylovou; (II) absorpci tohoto reakcního produktu za použití vysokovroucího rozpouštedla; (III) rozdelení rozpouštedla s absorbovaným produktem ze stupne (I), které se získá ve stupni (II), na rozpouštedlo a surovou (meth)akrylovou kyselinu pomocí destilace; (IV) vycištení surové (meth)akrylové kyseliny ze stupne (III) krystalizací za vzniku (meth)akrylové kyseliny; a (V) recirkulaci prinejmenším cásti výsledného matecného louhu dostupne (II) a/nebo stupne (III).
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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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Patent Agency Ranking
公开(公告)号：BR0317622A
公开(公告)日：2005-11-29
申请号：BR0317622
申请日：2003-12-24
Applicant: BASF AG
Inventor： THIEL JOACHIM , VANDENMERSCH HUGUES , SCHROEDER JUERGEN , DAMS ALBRECHT
Abstract: In a thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column containing sieve trays as separating internals, at least some of the sieve trays are operated above an entrainment fraction of 10% by weight.
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公开(公告)号：AU2003294002A1
公开(公告)日：2004-08-10
申请号：AU2003294002
申请日：2003-12-24
Applicant: BASF AG
Inventor： SCHRODER JURGEN , THIEL JOACHIM , DAMS ALBRECHT
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公开(公告)号：SG77590A1
公开(公告)日：2001-01-16
申请号：SG1997000382
申请日：1997-02-21
Applicant: BASF AG
Inventor： MACHHAMMER OTTO , DAMS ALBRECHT , ECK BERND , PROLL THEO
Abstract: A process for purifying (meth)acrylic acid by phase separation techniques comprises the following steps: (a) a mixture containing (meth)acrylic acid is separated into distinct phases in the presence of an organic solvent, with the composition of the (meth)acrylic acid-rich phase remaining essentially unchanged, and this acid-rich phase is separated; (b) the remaining phase from step (a) is separated into indistinct phases; and (c) one of the phases from step (b) is returned to step (a). Also claimed is preparation of (meth)acrylic acid. Preferably in step (c) the acid-rich phase is returned to step (a). 1-100 (100) wt.% of the phase remaining from step (a) is used in step (b). Pure end product is added to steps (a) and (b). Step (a) involves crystallisation, freezing or sublimation, preferably static and/or dynamic crystallisation, and most preferably a combined static and dynamic crystallisation in which the residue from the dynamic crystallisation is added to the static crystallisation step and the crystallised product from the static crystallisation is returned to the dynamic crystallisation.
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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：BR9703407A
公开(公告)日：1999-01-05
申请号：BR9703407
申请日：1997-05-27
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , HERBST HOLGER , DAMS ALBRECHT , WECK ALEXANDER , NESTLER GERHARD , IFFLAND GABRIELE , EXNER HERBERT
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