Silica xerogels

Details Silica xerogels Silica xerogels

1974-01-28

1977-10-11

Stern, Edward

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423335, 423339, 252451, C01B 3316

Patent

active

040535657

ABSTRACT:
Silica xerogels having pore volumes greater than about 2.0 cc/g., the major portion of which volumes are provided by pores having pore diameters ranging from 300 to 600 A, and surface areas ranging from 200 to 500 m.sup.2 /g. Xerogels having such cumulative pore volume, pore diameter distribution, and surface area characteristics are useful as supports for stereospecific catalysts for particle form olefin polymerization reactions effecting the production of low molecular weight, high melt index polyolefins.

REFERENCES:
patent: 1900859 (1933-03-01), Connolly et al.
patent: 2699376 (1955-01-01), Hay
patent: 3081154 (1963-03-01), Acker et al.
patent: 3417028 (1968-12-01), Montgomery et al.
patent: 3428425 (1969-02-01), Marotta
patent: 3453077 (1969-07-01), Hyde
patent: 3652215 (1972-03-01), Aboutboul et al.
patent: 3652216 (1972-03-01), Krekeler et al.
Book "The Colloid Chemistry of Silica and Silicates" 1955 Ed. by Ralph K. Iler, pp. 128 and 137, Cornell University Press, Ithaca, New York.

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