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US 3,937,782 AGranted
Process for the production of monosilandiol
OwnerDavid H. Blountinventor
Life of this patent
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Abstract
A dry alkaline earth metal silicate or an alkali metal silicate is reacted with a concentrated mineral acid to form silico-formic acid and hydrogen salt. The acid and hydrogen salt is reacted with a dry alkali metal carbonate or hydroxide to produce monosilanal. Monosilanol is reacted with water to produce monosilandiol.
Claims8
The method of producing monosilandiol by the following steps:
- a. a dry alkali metal metasilicate is added, with agitation over a period of 15 to 45 minutes to a mineral acid in the ratio of 1:2 mols, and the temperature is kept between 25.degree. and 85.degree.C;
- the chemical reaction is completed in 4 to 12 hours, producing silico-formic acid and an alkali metal hydrogen salt in the form of a white granular mixture;
- then
- b. an alkali metal carbonate is slowly mixed with the above silico-formic acid and alkali metal hydrogen salt until the pH is from 8 to 12;
- carbon dioxide and oxygen evolve from the mixture, and the mixture forms a solid mass in about 1 to 2 hours, which contains monosilanal and an alkali metal salt;
- then
- c. water is mixed with the above solid mass and the alkali metal salt is filtered off and the water reacts with monosilanal, thereby forming silandiol (H.sub.2 Si(OH).sub.2), a white granular compound.
4 more elements
Dependencies are inferred from the claim text.