Process for separating hydrocarbons

Abstract

Abstract THE INVENTION RELATES TO A PROCESS FOR SEPARATING MIXTURES OF HYDROCARBONS, NOTABLY CONJUGATED DIENE HYDROCARBONS, FROM MIXTURES CONTAINING THE SAME, BY THE GENERAL TECHNIQUE OR PERMEATION OR PERVAPORATION THROUGH SPECIFIC MEMBRANES. THE SPECIFIC MEMBRANES USED ARE FORMED OF A HIGH POLYMER COMPRISING FUNCTIONAL GROUPS CHEMICALLY COMBINED BY COVALENT BONDING WITHIN THE POLYMER FORMING THE SAID MEMBRANE, THE SAID GROUPS POSSESSING A PHYSPHYSIOCHEMICAL AFFIITY, NOTABLY A CAPACITY TO COMPLEX, WITH RESPECT TO ONE OF SAID HYDROCARBONS AND, SUBSTANTIALLY, THE ABSENCE OF SUCH A CAPACITY RESPECT TO OTHER HYDROCARBONS OF THE MIXTURE. FOR THE SEPARATION OF DIENES, SUCH AS BUTADIENE AND PENTADIENE, MEMBRANES ARE USED CONTAINING ACTIVE NITRIL, PYRROLIDONE, N-SUBSTITUED GROUPS, SUCH AS N-ALKYL GROUPS, NOTABLY N-METHYL OR N-METHYL-PYRROLIDONE. THE MEMBRANE CAN BE OBTAINED, FOR EXAMPLE, FROM A VULCANIZED BUTAIENE-ACRYLONITRILE RUBBER, WHICH CAN CONTAIN ABOUT 5 TO 60% ACRYLONITRILE, AND NOTABLY FROM 20 TO 30%.

Inventors

• 👤 G Bulvestre
• 👤 M Juillou
• 👤 P Thirion
• 👤 R Pautrat
• 👤 J Brun

Bibliographic Details