Compositions – Preservative agents – Anti-corrosion
Patent
1994-10-14
1997-01-28
Lewis, Michael
Compositions
Preservative agents
Anti-corrosion
2523131, 2523132, 10628734, 423335, B01J 1300
Patent
active
055975127
ABSTRACT:
A method for preparing a silica sol having an elongated shape comprising a step (a) where an aqueous solution containing a water-soluble calcium salt or a water-soluble magnesium salt or a mixture of the water-soluble calcium salt or the water-soluble magnesium salt is mixed with an aqueous colloidal solution of an active silicic acid; a step (b) where an alkaline substance is mixed with the aqueous liquid obtained in the step (a); a step (c) where a part or the whole of the mixture obtained in the step (b) is heated at 60.degree. C. or higher to obtain a heel solution and a feed solution is prepared by a part of the mixture obtained in the step (b) or a mixture separately prepared by the step (b) and the feed solution is added to the heel solution; and a step where water is evaporated during said addition step so that SiO.sub.2 concentration is concentrated to 6 to 30% by weight.
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Kashima Yoshiyuki
Takagi Hiroyuki
Watanabe Yoshitane
Hendrickson Stuart L.
Lewis Michael
Nissan Chemical Industries Ltd.
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