Abstract:
A process for producing a composite membrane, wherein by hydrothermal synthesis on a porous support, one or more MFI-type zeolites containing microporous separation layers are produced, characterized in that, to the synthesis solution for the hydrothermal synthesis, one or more additions are made from the group of linear (C1-C4)-alcohols, ammonia, primary, secondary and tertiary amines, each having (C1-C4)-alkyl radicals, (C1-C4)-amino alcohols and (C3-C4)-ketones.