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公开(公告)号：WO0155076A3
公开(公告)日：2001-12-20
申请号：PCT/EP0100743
申请日：2001-01-24
Applicant: BASF AG , DECKER EMILE DE , BASTIAENSEN ERIK , BAUMANN DIETER , ECK BERND , HEILEK JOERG
Inventor： DE DECKER EMILE , BASTIAENSEN ERIK , BAUMANN DIETER , ECK BERND , HEILEK JOERG
Abstract: The invention concerns a method for purifying (meth)acrylic acid by means of crystallization, whereby the (meth)acrylic acid is purified by combining at least two different dynamic crystallization methods, especially a suspension crystallization method and a layer crystallization method.
Abstract translation: 本发明涉及通过结晶纯化（甲基）丙烯酸的方法，其中通过至少两种不同的动态结晶过程，特别是悬浮结晶和层结晶的组合来纯化（甲基）丙烯酸。
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公开(公告)号：DE19838845A1
公开(公告)日：2000-03-02
申请号：DE19838845
申请日：1998-08-26
Applicant: BASF AG
Inventor： ECK BERND , THIEL JOACHIM , MACHHAMMER OTTO , DE DECKER EMILE
Abstract: Purification of acrylic acid (I) comprises crystallization from a mixture containing (I) and a solvent (II) with a higher boiling point than (I). An Independent claim is also included for the production of (I) by preparing: (a) a gaseous reaction product with the composition of a reaction mixture from catalytic gas phase oxidation of 3 carbon (C) alkanes, alkenes, alkanols, alkanals and/or their precursors to (I); (b) absorbing the reaction product in (II) to give a mixture containing (I) and (II); and (c) purification as above.
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Patent Agency Ranking
公开(公告)号：DE3784146D1
公开(公告)日：1993-03-25
申请号：DE3784146
申请日：1987-12-04
Applicant: BASF AG
Inventor： DE DECKER EMILE , OOSTVOGELS JOZEF , VAN WAUWE GERARD , NEUBAUER GERALD DR
IPC: C07D201/04
Abstract: In prepn. of caprolactam by Beckmann conversion of cyclohexanone oxime with oleum at 70-130 deg.C, in at least 1 stage, the reaction mixt. is held for 10-600 mins. at 70-110 deg.C in a post-residence zone. Conversion is at 108-118 deg.C in 2 or 3 stages, with addn. to the 1st stage of all the oleum and 60-95 pts. of cyclohexanone oxime, and addn. of 40-5 pts. of the oxime to the latter stages. The mixt. is held in the post-residence zone for 15-180 mins., at 90-100 deg.C.
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公开(公告)号：DE3887434D1
公开(公告)日：1994-03-10
申请号：DE3887434
申请日：1988-10-11
Applicant: BASF AG
Inventor： NEUBAUER GERALD DR , DE DECKER EMILE , FUCHS HUGO DR , HOLZKNECHT BERNHARD DR , RITZ JOSEF DR
IPC: C07D201/16
Abstract: Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps: (a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor, (b) separating off the purified caprolactam crystals to leave a mother liquor, (c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d), (d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage (e) (d) and recycling the same into stage (a) to leave a mother liquor, (f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).
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公开(公告)号：DE50101261D1
公开(公告)日：2004-02-05
申请号：DE50101261
申请日：2001-01-24
Applicant: BASF AG
Inventor： DE DECKER EMILE , BASTIAENSEN ERIK , BAUMANN DIETER , ECK BERND , HEILEK JOERG
Abstract: Purification of (meth)acrylic acid by crystallisation is carried out using a combination of >=2 different dynamic crystallisation processes.
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公开(公告)号：DE10003498A1
公开(公告)日：2001-08-02
申请号：DE10003498
申请日：2000-01-27
Applicant: BASF AG
Inventor： DE DECKER EMILE , BASTIAENSEN ERIK , BAUMANN DIETER , ECK BERND , HEILEK JOERG
Abstract: Purification of (meth)acrylic acid by crystallisation is carried out using a combination of >=2 different dynamic crystallisation processes.
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公开(公告)号：ES2048183T3
公开(公告)日：1994-03-16
申请号：ES88116802
申请日：1988-10-11
Applicant: BASF AG
Inventor： NEUBAUER GERALD DR , DE DECKER EMILE , FUCHS HUGO DR , HOLZKNECHT BERNHARD DR , RITZ JOSEF DR
IPC: C07D201/16
Abstract: Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps: (a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor, (b) separating off the purified caprolactam crystals to leave a mother liquor, (c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d), (d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage (e) (d) and recycling the same into stage (a) to leave a mother liquor, (f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).
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