Process of preparing high-porosity silica xerogels using alkanol

Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing

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2523156, 65 183, 501 12, 502233, C01B 3316

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active

052700275

ABSTRACT:
The invention relates to high-porosity silica xerogels and a process for their preparation consisting of subjecting silica alcogels to thermal treatment in the presence of organic compounds containing amino and hydroxyl groups.
The xerogels are characterised by a total pore volume .gtoreq.2 cc/g and a mean pore diameter .gtoreq.100 .ANG..

REFERENCES:
patent: 4152503 (1979-05-01), Short et al.
patent: 4775520 (1988-10-01), Unger et al.
patent: 4776867 (1988-10-01), Onorato et al.
patent: 5207814 (1993-05-01), Cogliati et al.
Chemical Abstracts, vol. 113, No. 6, Aug. 6, 1990, AN 43387a, p. 154, and JP-A-02-111-616, Apr. 24, 1990, "Preparation of Silica Gel With High Surface Area".
Chemical Abstracts, vol. 114, No. 8, Feb. 25, 1991, AN 65298v, p. 184, and JP-A-02-255-517, Oct. 16, 1990, "Manufacture of Silica Particles".

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