Mesoporous silica, mesoporous silica composite material, and processes for production thereof

Abstract

A mesoporous silica is provided, having uniform mesopores and a periodic structure, which contains Zr in the form of a Si—O—Zr bond. The Zr content in the Si—O—Zr bond, represented by [Zr/(Si+Zr)], is 0.05 to 20 mole %. The mesoporous silica is superior in alkaline resistance and is suitably used as a separation membrane (e.g. a ceramic membrane) and a catalytic support for a solid-liquid system, in which an alkaline liquid may be used.

1 - 12 . (canceled)  
   
   
       13 . A process for producing a mesoporous silica composite material, which comprises dipping a porous substrate in a solution or dispersion containing a Si source and a Zr source, adding the porous substrate and the solution or dispersion containing a Si source and a Zr source, into a solution containing a surfactant, stirring the resulting mixture to form a gel, placing the gel and the porous substrate in a pressure vessel and keeping them at a predetermined temperature, then calcining them.  
   
   
       14 . (canceled)