Porous silicic acid and its production

Details Porous silicic acid and its production Porous silicic acid and its production

1974-07-24

1977-02-01

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252451, 260429R, 2604295, 260439R, 260448R, 423325, 423326, 423327, 423338, 423339, C07F 1100

Patent

active

040061752

ABSTRACT:
Porous silicic acid having a specific surface of about 50 to 1000 m.sup.2 /g and having an anion content below the chemically determinable limit of detection is made by hydrolyzing methyl or ethyl silicate or polymethyl or polyethyl silicate with about 70 to 120% of the stoichiometric amount of water with moderate stirring.
Hydrolysis activators such as acids or bases may be present as well as alcoholates of oxides of transition metals which then appear in the end product. Alcohol may also be present to facilitate hydrolysis.
The products are characterized by marked purity and their specific surface can be closely and reproducibly controlled.

REFERENCES:
patent: 2512063 (1950-06-01), Kreidl et al.
patent: 2716656 (1955-08-01), Boyd
patent: 2794002 (1957-05-01), Haensel et al.
patent: 3321276 (1967-05-01), Burzynski et al.
patent: 3458552 (1969-07-01), Hauck et al.
patent: 3541126 (1970-11-01), Baronnier et al.
patent: 3554698 (1971-01-01), Burzynski et al.
patent: 3625934 (1971-12-01), Rinse

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