公开(公告)号：US3784620A

公开(公告)日：1974-01-08

申请号：US3784620D

申请日：1972-12-14

Applicant: MONSANTO CO

Inventor： PERRY E ,  STRAZIK W

IPC: B01D71/56 ,  C07C7/144 ,  C07C15/46 ,  C07C7/02

CPC classification number: B01D61/362 ,  B01D71/56 ,  C07C7/144 ,  C07C15/00

Abstract: WHEREIN R AND R'' ARE AROMATIC OR ALIPHATIC. EXEMPLARY OF THE POLYAMIDES ARE NYLON-6 AND NYLON 6, 10.

-(NH-R-NH-CO-R-CO)A- AND -(NH-R-CO)A-

STYRENE IS SEPARATED FROM ORGANIC MIXTURE COMPRISING STYRENE AND ETHYLBENZENE BY CONTACTING THE SAID MIXTURE UNDER PERVAPORATION PERMEATION CONDITIONS AGAINST ONE SIDE OF A POLYAMIDE PERMEATION MEMBRANE AND WITHDRAWING ON THE OTHER SIDE OF THE MEMBRANE A VAPOROUS MIXTURE HAVING AN INCREASED CONCENTRATION OF STYRENE. THE POLYAMIDES HAVE UNITS SELECTED FROM THE GROUP CONSISTING OF

公开(公告)号：US3773848A

公开(公告)日：1973-11-20

申请号：US3773848D

申请日：1971-12-16

Applicant: MONSANTO CO

Inventor： PERRY E ,  STRAZIK W

IPC: C07C7/144 ,  C07C11/00 ,  C07C11/12 ,  C07C7/02

CPC classification number: B01D61/362 ,  B01D71/42 ,  C07C7/144 ,  C07C11/167

Abstract: DIENES SUCH AS BUTADIENE AND ISOPRENE ARE SEPARATED FROM ORGANIC MIXTURES CONTAINING SAME BY CONTACTING THE MIXTURE AGAINST ONE SIDE OF A POLYMERIC MEMBRANE AND WITHDRAWING AT THE OTHER SIDE A VAPOROUS MIXTURE HAVING INCREASED DIENE CONCENTRATION. THE POLYMER MEMBRANE IS AN ACRYLONITRILE CONTAINING POLYMER WHICH IS (1) A COPOLYMER OF ACRYLONITRILE OR (2) A POLYMER BLEND CONTAINING ACRYLONITRILE POLYMER. EXEMPLARY OF THE POLYMER MEMBRANES ARE COPOLYMERS OF ACRYLONITRILE AND A STYRENE, VINYL ACETATE AND N-VINYLPYRROLIDONE AND BLENDS OF POLYACRYLONITRILE AND POLYSTYRENE, POLYVINYL ACETATE AND POLYVINYLPYRROLIDONE. EXEMPLARY OF THE ORGANIC MIXTURES IS A MIXTURE OF BUTADIENE AND BUTENE.