Separation membrane and its preparation

Abstract

Abstract PURPOSE:To obtain a separation membrane excellent in heat resistance, chemical resistance and durability, generating no crack and suitable for the separation of gas, by forming a membrane having fine pores with a specific pore size to the surface of a support comprising a ceramic porous body, obtained by sintering a particulate, by a gaseous phase method. CONSTITUTION:A particulate comprising mullite is baked to form a flat plate shaped support 1 comprising a ceramic porous body having open fine pores 3 and this support 1 is treated in a reaction tube by a gaseous phase method to form a membrane 6 comprising Al2O3 on the support. In this case, the temp. of the support 1 and atmospheric pressure are controlled to form the membrane 6 having almost fine pores with a pore size of 5-2,000Angstrom . By this method, a separation membrane, wherein the surface of the support comprising the ceramic porous body excellent in mechanical strength and gas permeability is coated with the membrane having fine pores suitable for the separation of gas, is obtained and the separation of gas can be performed with good efficiency.

Inventors

• 👤 Fumio Abe
• 👤 文夫 安部
• 👤 Yasushi Fujita
• 👤 藤田　恭

Bibliographic Details