Manufacture of porous carbon membranes

Details Manufacture of porous carbon membranes Manufacture of porous carbon membranes

1988-07-13

1990-04-24

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264 292, 264 296, 264 297, 264 41, 264 83, 264 85, 264102, 264129, 264233, 2642888, 2642893, 2642896, 264340, 427175, 427226, 427227, 21050021, 21050023, 21050043, B29C 6720, B29C 7102

Patent

active

049198602

ABSTRACT:
The invention relates to a process for making porous carbon membranes and membranes which can made by this process. As starting material, a porous membrane from an acrylonitril-polymer is used. The starting material is pretreated with a hydrazine solution, followed by preoxidation and carbonization. The process enables carbon membranes to be made with selectively adjusted pore sizes and tight pore size distribution. The pore sizes can lie in the ultrafiltration or microfiltration range. The membranes are suitable for separation processes, in which chemically aggressive media are used and for high-temperature processes. They can be used wherever electrical conductivity of the membranes is required.

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