Preparation of silica sol

Details Preparation of silica sol Preparation of silica sol

1987-11-05

1989-02-21

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556400, C07F 708, C07F 710

Patent

active

048066656

ABSTRACT:
A method for producing a silica sol containing less than 200 ppm sodium having an average particle size of 2-110 nm, and a particle size distribution with a coefficient dispersion of 0.16-0.4. The silica sols are produced using a lower alkanolamine containing heal to which aliquots of silicic acid are added. The aliquots are added to maintain a substantially constant concentration of colloidal silica in the product. Subsequent to production, the sol may be concentrated by ultrafiltration.
Preparation of low sodium silica sol utilizing a constant silica technique by heating the initial heel to 94.degree..+-.4.degree. C. and adding additional silica maintaining constant total silica. The stabilization is effected with an alkanolamine.

REFERENCES:
patent: Re29948 (1979-03-01), Dwyer et al.
patent: 2408654 (1946-10-01), Kirk
patent: 2689245 (1954-09-01), Merrill
patent: 3129177 (1964-09-01), Ihde et al.
patent: 3239521 (1966-03-01), Weldes
patent: 3239549 (1966-03-01), Weldes
patent: 3301853 (1967-01-01), Weldes
patent: 3326910 (1967-06-01), Weldes
patent: 4376757 (1983-03-01), Hinnenkamp et al.
patent: 4644077 (1987-02-01), Gupta
patent: 4694092 (1987-09-01), Takahata et al.

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