公开(公告)号：DE69902683T2

公开(公告)日：2003-07-31

申请号：DE69902683

申请日：1999-11-08

Applicant: BASF AG

Inventor： BERTOLA ALDO ,  CONSTANTINESCU TAKE ,  RAUCQ PHILIPPE ,  CASSARINO SALVATORE

IPC: C07B61/00 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00

Abstract: A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride.

公开(公告)号：DE69902683D1

公开(公告)日：2002-10-02

申请号：DE69902683

申请日：1999-11-08

Applicant: BASF AG

Inventor： BERTOLA ALDO ,  CONSTANTINESCU TAKE ,  RAUCQ PHILIPPE ,  CASSARINO SALVATORE

IPC: C07B61/00 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00

Abstract: A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride.

公开(公告)号：ES2183630T3

公开(公告)日：2003-03-16

申请号：ES99959273

申请日：1999-11-08

Applicant: BASF AG

Inventor： BERTOLA ALDO ,  CONSTANTINESCU TAKE ,  RAUCQ PHILIPPE ,  CASSARINO SALVATORE

IPC: C07B61/00 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00

Abstract: A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride.

公开(公告)号：BR0014993A

公开(公告)日：2002-06-18

申请号：BR0014993

申请日：2000-10-25

Applicant: BASF AG

Inventor： BERTOLA ALDO ,  CASSARINO SALVATORE ,  RAUCQ PHILIPPE

IPC: C07D207/26 ,  C07D207/267 ,  C07D201/08

Abstract: A process for the production of N-methyl pyrrolidone using gamma butyrolactone and mixed methylamines as starting materials, in a continuous process, in such operating conditions as to allow the production of high purity N-methyl pyrrolidone in high yields.

公开(公告)号：AT222898T

公开(公告)日：2002-09-15

申请号：AT99959273

申请日：1999-11-08

Applicant: BASF AG

Inventor： BERTOLA ALDO ,  CONSTANTINESCU TAKE ,  RAUCQ PHILIPPE ,  CASSARINO SALVATORE

IPC: C07B61/00 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00

Abstract: A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride.

公开(公告)号：CA2388684A1

公开(公告)日：2001-05-03

申请号：CA2388684

申请日：2000-10-25

Applicant: BASF AG

Inventor： BERTOLA ALDO ,  CASSARINO SALVATORE ,  RAUCQ PHILIPPE

IPC: C07D207/26 ,  C07D207/267 ,  C07D201/08

Abstract: A process for the production of N-methyl pyrrolidone using gamma butyrolacto ne and mixed methylamines as starting materials, in a continuous process, in su ch operating conditions as to allow the production of high purity N-methyl pyrrolidone in high yields.