▎ 摘　　要

NOVELTY - The membrane (10) has a supporting membrane (100) made of porous polymer. A set of graphene derivative layers (110) is formed on the supporting membrane, where distance between adjacent graphene derivative layers is about 0.3-1.5 nm and a total thickness of the graphene derivative layers is more than 0.3 nm. The graphene derivative layers are formed by using dispersion solution of graphene derivatives to deposit graphene derivatives through high pressure process onto the supporting membrane. USE - Graphene derivative composite membrane for use as an isopropyl alcohol separation membrane (claimed) to separate isopropyl alcohol and waste water i.e. semiconductor or solar cell processing waste water, from mixture water and alcohol. ADVANTAGE - The membrane satisfies consideration of environmental protection, energy conservation and cost reduction and effective recycling and purifying process requirements and avoids unnecessary limits. DETAILED DESCRIPTION - The supporting membrane is a porous membrane. INDEPENDENT CLAIMS are also included for the following: (1) a method for fabricating a graphene derivative composite membrane (2) an isopropyl alcohol separation membrane. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a structure of a graphene derivative composite membrane. Layer-to-layer distance (H1) Graphene derivative composite membrane (10) Supporting membrane (100) Graphene derivative layer (110)