Reaction bonded silicon nitride filtration membranes

Details Reaction bonded silicon nitride filtration membranes Reaction bonded silicon nitride filtration membranes

1989-11-13

1991-04-02

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050025, 427245, B01D 7102

Patent

active

050045440

ABSTRACT:
Strong and durable silicon nitride filtration membranes with effective separating layers having effective pore diameters less than about 1 micron are produced by depositing a source of silicon onto a porous microfilter support, removing any liquid used in the depositing, and subjecting the silicon source to nitridation conditions. Suitable sources of silicon include silicon per se and silica. When silica is used, a suitable reducing agent is deposited therewith to reduce the silica to silicon in situ.

REFERENCES:
patent: 4698157 (1987-10-01), Gillot

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