Controlling silica sol particle size

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...

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Bibliographic Details
Main Authors LIEB; DONALD F, SUGANO; THOMAS T
Format Patent
LanguageEnglish
Published 07.11.1978
Subjects
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary: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.
Bibliography:Application Number: US19770826511