Controlling silica sol particle size

Details Controlling silica sol particle size Controlling silica sol particle size

1977-08-22

1978-11-07

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204101, 423333, 423338, 423339, B01D 1302

Patent

active

041244710

ABSTRACT:
A novel method of controlling electrodialytically produced silica sol particle size and concentration comprising effecting electrodialysis of an alkali metal silicate anolyte in an electrodialysis cell with a cation permselective membrane separating the anolyte and the catholyte while adding alkali metal silicate solution to the anolyte to maintain the desired pH whereby a silica sol with increasing particle size is formed and when the silica sol has reached the desired particle size, continuing electrodialysis with addition of an alkali metal hydroxide solution to control the pH until the silica sol has the desired concentration.

REFERENCES:
patent: 1562940 (1925-11-01), Collins
patent: 3654105 (1972-04-01), Chilton
patent: 3654865 (1972-04-01), Tamal
patent: 3668088 (1972-06-01), Iler
patent: 3723273 (1973-03-01), Wilson et al.

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