| 摘要 |
A process for producing a ceramic porous membrane, in which a thin homogeneo us porous membrane with coarse pores and other defects reduced can be obtained through a reduced number of membrane forming operations. There is provided a process for producing a ceramic porous membrane in which a ceramic porous membrane is formed on the wall surface within through-holes of a tubular or lotus-root-shaped porous base material. In the process, porous base material (1) is placed so that the through-holes thereof agree with the vertical direction. Ceramic sol solution (5) having a temperature difference of withi n 50~C as compared with the porous base material (1) is fed onto the inner wal l surface of the porous base material (1), and the feeding is discontinued at the stage of overflow of an upper end portion of the porous base material (1 ) by the ceramic sol solution (5). The ceramic sol solution (5) is drawn out from the inferior side of the porous base material (1). Upon completion of drawing out of the ceramic sol solution (5), a pressure difference is applie d so that the pressure on the side of outer circumferential surface of the porous base material (1) is lower than that on the side of inner wall surfac e of the porous base material (1).
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