Preparation of composite membrane having selective permeability of organic substance

Abstract

Abstract PURPOSE:To enhance separation efficiency, in selectively permeating and separating an org. substance from a mixed solution system of the org. substance and water, by using a composite membrane with selective permeability obtained by condensing and crosslinking furfuryl alcohol in the presence of a specific catalyst. CONSTITUTION:On a microporous support membrane comprising a base material not dissolved in an org. solvent used in a film forming stock liquid or an org. solvent in a liquid to be separated, a solution of furfuryl alcohol or a mixture of furfuryl alcohol and a reactive monomer condensible therewith such as furfural, formaldehyde or phenol dissolved in water or an org. solvent containing a phosphoric acid catalyst is coated and heated to 80-200 deg.C to be condensed and crosslinked. The obtained membrane can permeate and separate a water soluble org. substance from a water/water soluble org. substance mixed system selectively by pervaporization or perstruction.

Inventors

• 👤 Hiromasa Minematsu
• 👤 宏昌 峯松
• 👤 Yutaka Takeya
• 👤 豊 竹谷

Bibliographic Details