公开(公告)号：DE59703923D1

公开(公告)日：2001-08-02

申请号：DE59703923

申请日：1997-09-22

Applicant: BASF AG

Inventor： MASSONNE KLEMENS ,  BECKER RAINER ,  NEUHAUSER HORST ,  ZIMMERMANN HORST ,  REIF WOLFGANG ,  CRAMERS PETER ,  NARDIN DANIEL

IPC: C07D307/88

Abstract: PCT No. PCT/EP97/05186 Sec. 371 Date Apr. 1, 1999 Sec. 102(e) Date Apr. 1, 1999 PCT Filed Sep. 22, 1997 PCT Pub. No. WO98/14441 PCT Pub. Date Apr. 9, 1998A process for preparing phthalides of the general formula I, where R1, R2, R3 and R4 are independently hydrogen, C1-C4-alkyl or C1-C4-alkoxy, by hydrogenating phthalic anhydrides of the general formula II, where R1, R2, R3 and R4 are each as defined above, with hydrogen in the presence of suspended catalysts of the Raney type in a hydrogenation apparatus by using a mixing apparatus to mix a liquid phase, which includes the catalyst and the phthalic anhydride used and resulting phthalide, and a gas phase, which includes the hydrogenating hydrogen, comprises using the mixing apparatus to introduce a mixing intensity of at least 50 W/l into the liquid phase.

公开(公告)号：DE19640554A1

公开(公告)日：1998-04-02

申请号：DE19640554

申请日：1996-10-01

Applicant: BASF AG

Inventor： MASSONNE KLEMENS DR ,  BECKER RAINER DR ,  NEUHAUSER HORST DR ,  ZIMMERMANN HORST DR ,  REIF WOLFGANG DR ,  CRAMERS PETER ,  NARDIN DANIEL

IPC: C07D307/88 ,  B01J25/00

Abstract: The invention concerns a process for preparing phthalides of general formula (I), in which R , R , R and R , independently of one another, designate hydrogen, C1-C4 alkyl or C1-C4 alkoxy, by hydrogenating phthalic acid anhydrides of general formula (II), in which the groups R , R , R and R have the above meanings, with hydrogen in the presence of suspended Raney-type catalysts in a hydrogenating device by mixing a liquid phase containing the catalyst and the phthalic acid anhydride used and the resultant phthalide and a gaseous phase containing the hydrogenating hydrogen using a mixing device which has a mixing output of at least 50 W/l in the liquid phase

公开(公告)号：AT202566T

公开(公告)日：2001-07-15

申请号：AT97909303

申请日：1997-09-22

Applicant: BASF AG

Inventor： MASSONNE KLEMENS ,  BECKER RAINER ,  NEUHAUSER HORST ,  ZIMMERMANN HORST ,  REIF WOLFGANG ,  CRAMERS PETER ,  NARDIN DANIEL

IPC: C07D307/88

Abstract: PCT No. PCT/EP97/05186 Sec. 371 Date Apr. 1, 1999 Sec. 102(e) Date Apr. 1, 1999 PCT Filed Sep. 22, 1997 PCT Pub. No. WO98/14441 PCT Pub. Date Apr. 9, 1998A process for preparing phthalides of the general formula I, where R1, R2, R3 and R4 are independently hydrogen, C1-C4-alkyl or C1-C4-alkoxy, by hydrogenating phthalic anhydrides of the general formula II, where R1, R2, R3 and R4 are each as defined above, with hydrogen in the presence of suspended catalysts of the Raney type in a hydrogenation apparatus by using a mixing apparatus to mix a liquid phase, which includes the catalyst and the phthalic anhydride used and resulting phthalide, and a gas phase, which includes the hydrogenating hydrogen, comprises using the mixing apparatus to introduce a mixing intensity of at least 50 W/l into the liquid phase.