公开(公告)号：US3793386A

公开(公告)日：1974-02-19

申请号：US3793386D

申请日：1972-06-06

Applicant: SUN RESEARCH DEVELOPMENT

Inventor： DAVIS R

IPC: C07C7/13 ,  C07C7/12 ,  C10G25/04

CPC classification number: C07C7/13 ,  C07C15/08 ,  C07C15/24

Abstract: SELECTIVE ADSORPTION OF P-XYLENE FROM A FLUID MIXTURE CONTAINING M-XYLENE CAB BE OBTAINED WITH COPPER-EXCHANGED MOLECULAR SIEVES (CRYSTALLINE ALUMINO-SILICATE ZEOLITES) WHICH HAVE A WATER LOSS ON IGNITION AT 800* C. IN THE RANGE OF 8-20 WT. PERCENT AND PREFERABLY, HAVE BEEN PARTIALLY DEHYDRATED AT A TEMPERATURE IN THE RANGE OF 50-300* C. PREFERABLY THE AL/SI RATIO IN THE ZEOLITE FRAMEWORK IS IN THE RANGE OF 0.2-0.65. FOR EXAMPLE, P-XYLENE CAN BE SEPARATED FROM M-XYLENE BY SELECTIVE ADSORPTION AT 100* C. OF THE P-XYLENE ON CUY ZEOLITE WHICH WAS PARTIALLY DEHYDRATED AT 82* C. AND CONTAINED ABOUT 15 WT. PERCENT WATER BY IGNITION ANALYSIS.

公开(公告)号：US3781298A

公开(公告)日：1973-12-25

申请号：US3781298D

申请日：1971-11-01

Applicant: SUN RESEARCH DEVELOPMENT

Inventor： DAVIS R

IPC: C07D207/267 ,  B01J25/00 ,  C07B61/00 ,  C07D201/08 ,  C07D27/08

CPC classification number: C07D201/08

Abstract: A PROCESS FOR PREPARING 2-PYRROLIDINONE WHICH COMPRISES REACTING SUCCINONITRILE IN AQUEOUS SOLUTION AND IN THE ABSENCE OF ADDED AMMONIA WITH HYDROGEN IN THE PRESENCE OF A RANEY COBALT CATALYST, AT A TEMPERATURE OF FROM ABOUT 250*C. TO ABOUT 300*C. AND AT A HYDROGEN PRESSURE OF FROM ABOUT 2000 TO ABOUT 3500 P.S.I.G.