Ultra thin zircon coating and membrane

Details Ultra thin zircon coating and membrane Ultra thin zircon coating and membrane

1992-09-28

1994-03-08

Beck, Shrive

Coating processes

Foraminous product produced

Filter, sponge, or foam

427245, 427246, 4273762, 427226, B05D 500

Patent

active

052925536

ABSTRACT:
A process to synthetize zircon as an ultra thin coating and comprising: (A) mixing an alcoholic sol resulting from hydrolysis of a silicon alkoxide with an alcoholic solution of a chelated zirconium compound and in the presence of and with a doping agent, until a homogenous mixed sol is obtained; (B) forming a matured sol containing colloidal particles and/or the polymeric entities from the mixed sol; (C) forming a coating of the matured sol on a microporous substrate; (D) drying slowly the sol coating into a gel coating free of flaws; and (E) firing the gel coating at a temperature of 900.degree. to 1500.degree. C. to form an ultra thin zircon layer. Use of the zircon layer obtained above as an ultrafiltration membrane or as a protective coating.

REFERENCES:
patent: 4562021 (1985-12-01), Alary et al.
patent: 4738874 (1988-04-01), Berardo et al.
patent: 5032556 (1991-06-01), Mori et al.

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