Process for preparing a membrane gas separation membrane comprises a microporous layer, of su00eclica doped by boron, the appropriate membrane for gas separation, the use of a membrane and nuclear installation

摘要

Process for preparing a membrane gas separation membrane comprises a microporous layer, of su00eclica doped by boron, the appropriate membrane for gas separation, the use of a membrane and nuclear installation.The present invention has for object a process for the preparation of a gas separation membrane, which comprises depositing a film from a sol of silica on a porous support, and the heat treatment of the film thus deposited.In the sun of silica deposited is prepared hidrolisando a alcu00f3xido of silicon in the presence of a quantity of dopant of a precursor of an oxide of a trivalent element, in particular, boron or aluminum.The present invention is, still, the membranes such as obtained according to this process, and their uses, in particular for the separation of helium or hydrogen at high temperature, and particularly for the removal of impurities in the flow of helium.