Separation membrane complex and method of producing separation membrane complex
AssigneeNGK Insulators, Ltd.
InventorsMakoto MIYAHARA, Kenichi NODA
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Abstract
A separation membrane complex includes a porous support, an intermediate membrane which is a polycrystalline membrane formed on a surface of the support and has pores that are originated from a framework structure and have an average pore diameter smaller than that of pores in the vicinity of the surface of the support, and a separation membrane which is formed on the intermediate membrane and is an inorganic membrane having a regular pore structure. In the separation membrane, a functional group is introduced into pores of a surface layer thereof which is away from the intermediate membrane.
Claims8
A separation membrane complex, comprising:
- a porous support;
- an intermediate membrane which is a polycrystalline membrane formed on a surface of said support and has pores originated from a framework structure, said pores having an average pore diameter smaller than that of pores in vicinity of said surface of said support;
- and
- a separation membrane which is formed on said intermediate membrane and is an inorganic membrane having a regular pore structure,
- wherein a functional group is introduced into pores of a surface layer in said separation membrane, said surface layer being away from said intermediate membrane.
A method of producing a separation membrane complex, comprising:
- a) preparing a porous support;
- b) forming an intermediate membrane on a surface of said support, said intermediate membrane being a polycrystalline membrane and having pores originated from a framework structure, said pores having an average pore diameter smaller than that of pores in vicinity of said surface of said support;
- c) forming a separation membrane on said intermediate membrane, said separation membrane being an inorganic membrane having a regular pore structure;
- and
- d) introducing a functional group into pores of a surface layer in said separation membrane by supplying a predetermined solution to said separation membrane, said surface layer being away from said intermediate membrane,
- wherein said intermediate membrane has impermeability to a precursor solution used for forming said separation membrane in said operation c) and said predetermined solution used in said operation d).
Dependencies are inferred from the claim text.