Abstract: The invention relates to a membrane having a pore-free separating layer including a polymer mixture for separating simple alcohols and water from their mixtures with other organic fluids by means of pervaporation or vapor permeation. In accordance with the invention, the polymer mixture is composed of at least two polymer components which are taken from the group of polymer components which includes of the following polymer components: Polyvinyl alcohol, other polymers such as poly N—N-dimethylaminoethyl methacrylate (poly DMAEMA), a copolymer of DMAEMA and N-vinyl pyrrolidone (NVP) or of DMAEMA and N-vinyl caprolactam (NVCL), a terpolymer of DMAE, NVP and NVCL or of vinyl acetate ethylene vinyl chloride or from vinyl chloride ethylene acrylic ester or from vinyl acetate vinyl chloride acrylic ester. The invention further relates to the use and to a method for manufacturing a membrane in accordance with the invention.

Abstract: The invention relates to a membrane having a pore-free separating laye including a polymer mixture for separating simple alcohols and water fr their mixtures with other organic fluids by means of pervaporation or vapor permeation. In accordance with the invention, the polymer mixtu is composed of at least two polymer components which are taken from t group of polymer components which includes of the following polymer components: Polyvinyl alcohol, other polymers such as poly N-N-dimethylaminoethyl methacrylate (poly DMAEMA), a copolymer of DMAEMA and N-vinyl pyrrolidone (NVP) or of DMAEMA and N-vinyl caprolactam (NVCL), a terpolymer of DMAE, NVP and NVCL or of vinyl acetate ethylene vinyl chloride or from vinyl chloride ethylene acrylic es or from vinyl acetate vinyl chloride acrylic ester. The invention further relates to the use and to a method for manufacturing a membrane in accordance with the invention.

Abstract: A composite membrane is provided for the separation of water with at least one separation layer of cross-linked polyvinyl alcohol, with the separation layer being subjected in a separate process step to a post-crosslinking operation with an acid or an acid-releasing compound and at least one dialdehyde.