| 摘要 |
PROBLEM TO BE SOLVED: To provide the siliceous composite member which has such a pore size distribution as to provide the member with excellent permeability and superior selectivity and in particular, is capable of efficiently separating H2 , CH4 or O2 from the air, various combustion exhaust gases, gaseous fuel raw materials, gaseous reactants, etc., and has excellent heat resistance and accordingly is appropriately used for the gas separation, at the time of separating a specific component(s) from each of various mixed fluids and also, to provide the production of the composite member. SOLUTION: This production comprises: bringing silicon alkoxide or silicon chloride, each of which compounds has an organic functional group(s) and contains only one reactionally- active group in the molecule, into contact with one surface of an inorganic porous base material having a <=10 nm average pore size to allow the silicon compound to permeate into the pores of the base material by the pressure difference between the contact surface and the other surface; and thereby subjecting OH groups within the pores of the base material and the silicon alkoxide or silicon chloride molecules each having an organic functional group(s) to substitution reaction with each other, to combine them by siloxane bonds and to form an siloxane-combined body having organic functional groups, integrally with the inner walls of the pores of the porous inorganic base material. Thus, the objective siliceous porous ceramic composite member having controlled pore size can be produced.
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