The invention relates to membranes and to a 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. According to the invention the membrane is formed from aromatic polyesters on the basis of aromatic diacid chlorides in combination with either bisphenol-A-like bisphenols, or a bisphenol which is completely built up of aromatic centres.
Preferably the membrane is formed from aromatic polyesters on the basis of aromatic diacid chlorides such as terephthaloyl chloride, isophthaloyl chloride, 5-t-butylisophthaloyl chloride, or PIDA in combination with bisphenol-A-like bisphenols, such as 4X-BPN, 4X-BPT, 4X-BPI.
                            本发明涉及从各种
芳香烃混合物或从此类
芳香烃和非
芳香烃混合物中分离
芳香烃的膜和方法。根据本发明,膜由芳香族聚酯在芳香族二酸
氯化物的基础上与类似双
酚 A 的双
酚或完全由芳香族中心组成的双
酚组合而成。
膜最好是由芳香族聚酯与
对苯二甲酰氯、
间苯二甲酰氯、5-t-丁基
间苯二甲酰氯或 
PIDA 等芳香族二酸酰
氯以及 4X-B
PN、4X-B
PT、4X-B
PI 等双
酚-A 类双
酚组合而成。