PURPOSE: To obtain a membrane having high permeability and good sepn. performance by coating the polyphenylene ether expressed by the specific general formulaIor II on a porous membrane.
CONSTITUTION: The composite membrane produced by dissolving the polyphenylene ether of about 900W100,000 number average mol.wts. expressed by the general formula (I) or (II) in an org. solvent such as benzene or toluene and coating the solvent on a porous membrane, and the homogeneous membrane or anisotropic membrane produced by casting said soln. are used as a membrane for sepn. of gases. There are no particular limits for the material of the porous membrane, and hollow yarn-, pipe-, and flat plate-like shapes are usable. The rate of permeation[CC(STP)/cm2.sec.cmHg]of the separating membrane produced by coating poly-2-methyl-6-pulenylphenol on a porous membrane in an embodiment is N2(4.4×10-5), O2(2.1×10-6).
MATSUURA JIYUNICHI
OKADA MUNEHISA
IKEGAMI YUMIKO
KONNO ISAO
