Gas-separaing membrane

Abstract

Abstract PURPOSE:A gas-separating membrane, having excellent selectivity high gas permeability, which comprises a mixture of polyvinyltriorganosilane and organopolysiloxane as the membrane material. CONSTITUTION:The membrane mateiral composed of a mixture of polyvinyltriorganosilane, represented by the formula 1, having an intrinsic viscosity of 50 cm<3>/g at 25 deg.C in cyclohexane, preferably 70 to 200 cm<3>/g, and organopolysiloxane having an average molecular weight of more than 10000 and containing one or more, as repeated unit, of the compounds, represented by the formulas, II, III, IV and X. The mixing proportion of both compounds is 1: 0.05 to 1 polyvinyltriorganosilane: organopolysiloxane by weigt. The preferred from the gas-separating membrane is a dense layer having a gas selectivity, preferably a double layer consisting of a 0.01 to 10 micron dense layer and a more than 10 micron porous layer.

Inventors

• 👤 Junichi Matsuura
• 👤 Yukio Yamaguchi

Bibliographic Details