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公开(公告)号:ES2288953T3
公开(公告)日:2008-02-01
申请号:ES01933954
申请日:2001-05-10
Applicant: BASF AG
Inventor: HELFERT HERBERT , SCHMIDT-RADDE MARTIN , LAQUA GERHARD , EIDEN ULRICH , SCHOLL STEPHAN , UBLER CHRISTOPH
IPC: C07D207/26 , B01D3/14 , B01J3/00 , C07D201/16 , C07D207/267
Abstract: Procedimiento para la elaboración de residuos de la obtención de pirrolidona, N-vinilpirrolidona o pirrolidona y N-vinilpirrolidona, teniendo los residuos la composición de un producto de cola, que se obtiene mediante reacción de gamma-butirolactona y amoniaco para dar pirrolidona, y/o mediante reacción de pirrolidona y etino para dar N-vinilpirrolidona, respectivamente tras purificación por destilación, caracterizado porque los residuos reunidos de la obtención de pirrolidona y N-vinilpirrolidona se someten a una termólisis, que se lleva a cabo en un tiempo de residencia de 1 a 10 horas, referido a los residuos empleados.
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公开(公告)号:DE10026233A1
公开(公告)日:2001-11-29
申请号:DE10026233
申请日:2000-05-26
Applicant: BASF AG
Inventor: ECK BERND , HEILEK JOERG , SCHMIDT-RADDE MARTIN , HELFERT HERBERT
IPC: C07D201/16 , C07D207/26 , C07D207/267
Abstract: The invention relates to a method for obtaining pure N-vinyl pyrrolidone from raw materials containing N-vinyl pyrrolidone, said method comprising a single or multiple-stage crystallisation method. The method is characterised in that the mother liquor of the first crystallisation stage is either purified by distillation and/or extraction or is returned to a product stream of the production process, said stream containing an N-vinyl pyrrolidone.
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公开(公告)号:DE59502578D1
公开(公告)日:1998-07-23
申请号:DE59502578
申请日:1995-10-24
Applicant: BASF AG
Inventor: HEIDER MARC , RUEHL THOMAS , HELFERT HERBERT , SCHMIDT-RADDE MARTIN , HENKELMANN JOCHEM
Abstract: The prepn. of monovinyl ethers of formula (I), comprises reacting a diol of formula (II) with C2H2 in the presence of a base. The reaction is carried out at 150-250 degrees C and an C2H2 partial pressure of 5-25 bar until the diol conversion is 40-80%, then the reaction is stopped and (I) is isolated. In (I) and (II): A = a chemical bond, -CH2- or -CH2CH2-; R , R = H, (cyclo)alkyl or aryl; or R R = a 3-5C alkylene bridge.
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