Activated silica sol

Details Activated silica sol Activated silica sol

1995-10-27

1996-11-12

McCarthy, Neil

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210723, 210728, 210928, 252175, 2523132, 10628734, 1621816, 4233281, 423338, C02F 152, B01J 1300

Patent

active

055736742

ABSTRACT:
A stable activated silica sol is made by reacting sodium aluminum sulfate and a solution of silica. This solution removes suspended particles from aqueous streams rapidly and effectively. The silica sol is stable for many days and thus can be prepared off-site and transported to the point of use. Further, the activated silica or colloidal silica sol solution of the invention can be continuously added to water and waste water streams, or paper making pulps, stocks and furnishes, without danger of solidifying in the transport systems.

REFERENCES:
patent: 2928754 (1960-03-01), Schappel
patent: 2931779 (1960-04-01), White
patent: 2974108 (1961-03-01), Alexander
patent: 2980558 (1961-04-01), Dempey et al.
patent: 3252917 (1966-05-01), Mindick et al.
patent: 3817861 (1974-06-01), Slusarczuk et al.
patent: 4095985 (1978-06-01), Brown
patent: 5023012 (1991-06-01), Buchan et al.
patent: 5149400 (1992-09-01), Haase et al.
Noreus, "The Use of Activated Silica in the Coagulation of Highly Colored Water," TAPPI, Paper Trade Journal, vol. 120, No. 11 Mar. 15, 1945 pp. 101-103.

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