Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1987-06-08
1988-09-13
Childs, Sadie L.
Coating processes
With post-treatment of coating or coating material
Heating or drying
427377, 427380, 4273978, B05D 302
Patent
active
047709081
ABSTRACT:
A process for preparing a porous ceramic membrane to be employed for separating condensible gases and so on, which process comprises disposing on a porous ceramic substrate a layer of alumina sol formed by hydrolyzing an alcoholate or a chelate of aluminum, with subsequent drying and burning thereof, impregnating the resulting burnt body with a solution of an alcoholate or a chelate of aluminum in an organic solvent and subjecting then the aluminum alcoholate or chelate soaked in the burnt body to hydrolysis in a heated steam to cause conversion thereof into alumina sol, immersing the so treated body in an aqueous solution of sodium silicate, followed by, a heat treatment thereof in steam, after the body has been removed from the solution repeating the foregoing procedures until the capillary pores in the substrate would have sufficiently been filled by the alumina sol, immersing the so treated body finally in an aqeous solution of sodium silicate, followed by, a further heat treatment thereof in a steam after the body has been removed from the solution and subsequent subjecting the body to a hot water rinse to remove occluded sodium ions before drying the body.
REFERENCES:
patent: 3635759 (1972-01-01), Howatt
patent: 3767453 (1973-10-01), Hockstra
patent: 4073999 (1978-02-01), Bryan et al.
patent: 4231900 (1980-11-01), Kato et al.
2344 Journal of Chemical Engineering of Japan 19(1986), Feb., No. 1, Tokyo Japan, by Asaeda et al., "A Method for Fluid Mixture Separation."
Mori Kazutaka
Tsuneyoshi Kikuji
Childs Sadie L.
Mitsubishi Jukogyo Kabushiki Kaisha
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