Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1992-03-12
1993-07-20
Chaudhuri, Olik
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
2523156, 502233, 521 53, C01B 33143
Patent
active
052290964
ABSTRACT:
The subject invention is a new type of silica gel and process for producing the same. The silica gel is the product of gelling alkali metal silicate with excess acid in aqueous medium containing a minute amount a polymerization modifier. The modifier and salts from the resulting gel are then leached with water before substantial drying effects have ensued. Spray-dried gel particles do not require the additional steps of aging or ammonia treating to achieve the desired result of high surface area and high pore volume. The gel can be produced to have various useful and unusual characteristics including the combination of high surface area, high pore volume, and a large average pore diameter.
REFERENCES:
patent: 4965289 (1990-10-01), Sherrington et al.
Satish K. Wason, Silica Gels, Pigment Handbook: vol. 1: Properties and Economics Second Ed. pp. 175-181 (1988).
Frank H. Dickey, Specific Adsorbtion, J. Phys. Chem., 59: 695-707 (1955).
Sidney A. Bernhard, The Preparation of Specific Adsorbents, JACS, 74: 4946-4947 (1952).
Linus Pauling, Tailor-Made Compounds Predicted, C. E.N., 27: 913 (1949).
R. Curti & V. Colombo, Chromatography of Stereoisomers with "Tailor Made" Compounds, JACS, 74: 3961 (1952).
Ralph K. Iler, The Colloid Chemistry of Silica and Silicates, Cornell University Press, pp. 150-152 (1955).
Frank H. Dickey, The Preparation of Specific Adsorbants, Proc. Natl. Acad. of Sci., 35: 227-229 (1949).
Chaudhuri Olik
Horton Ken
SCM Chemicals, Inc.
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