MEMBRANE AND METHOD FOR THE SEPARATION OF AROMATIC HYDROCARBONS FROM A MIXTURE OF VARIOUS AROMATIC HYDROCARBONS OR FROM A MIXTURE OF SUCH AROMATIC HYDROCARBONS AND NON-AROMATIC HYDROCARBONS

摘要

The invention relates to membranes and to a methodfor the separation of aromatic hydrocarbons from a mixture ofvarious aromatic hydrocarbons or from a mixture of such aro-matic hydrocarbons and non-aromatic hydrocarbons. Accordingto the invention the membrane is formed from aromatic poly-esters on the basis of aromatic diacid chlorides in combina-tion with either bisphenol-A-like bisphenols, or a bisphenolwhich is completely built up of aromatic centres.Preferably the membrane is formed from aromaticpolyesters on the basis of aromatic diacid chlorides such asterephthaloyl chloride, isophthaloyl chloride, 5-t-butyliso-phthaloyl chloride, or PIDA in combination with bisphenol-A-like bisphenols, such as 4X-BPN, 4X-BPT, 4X-BPI.