公开(公告)号：EP0593458A4

公开(公告)日：1993-03-15

申请号：EP91908530

申请日：1991-04-08

Applicant: ISP INVESTMENTS INC

Inventor： TAYLOR PAUL D ,  DE THOMAS WALDO ,  BUCHANAN DONALD W JR

IPC: B01J23/80 ,  B01J35/10 ,  B01J37/18 ,  C07B61/00 ,  C07D307/33 ,  C07D315/00 ,  B01J23/06 ,  B01J23/72

CPC classification number: C07D315/00 ,  B01J23/80 ,  B01J37/18

Abstract: Vapor phase catalytic hydrogenation of maleic anhydride to gamma-butyrolactone is achieved in a conversion of 95 % or more and a selectivity of 80 % or more during a prolonged period of production. The process of the invention uses an activated catalyst prepared by reducing a catalyst composition comprising 30-65 % by weight of CuO, 18-50 % by weight of ZnO and 8-22 % by weight of Al2O3, and, particularly, by activating the reduced catalyst composition in hydrogen at an activation temperature of at least 400 °C, preferably 400 °C to 525 °C, and optimally about 425 °C. The hydrogenation process is carried out under predetermined and advantageous process conditions, including a defined molar ratio of hydrogen to maleic anhydride in the vapor reactant stream, a selected pressure during hydrogenation, an advantageous feed rate space velocity, a predetermined contact time, and a suitable reaction temperature.

公开(公告)号：EP0691954A4

公开(公告)日：1996-04-24

申请号：EP94910682

申请日：1994-02-08

Applicant: ISP INVESTMENTS INC

Inventor： MANDELLA WILLIAM L ,  TAYLOR PAUL D ,  SMITH TERRY E

IPC: A01N43/36 ,  B01F17/16 ,  B01F17/52 ,  C07D207/26 ,  C07D207/27 ,  C07D207/267

CPC classification number: C07D207/27

Abstract: This invention relates to non-polymeric, asymmetrical, low freezing, high boiling, aliphatic compounds containing from 2 to 5 pyrrolidonyl rings and from 13 to 40 carbon atoms which melt below 0 °C and which boil above 300 °C at atmospheric pressure and to the synthesis and use of said liquid polypyrrolidonyl compounds.