Method for the production of tetraalkyl silicates
AssigneeStauffer Chemical Company
InventorsWalter L. Magee, Jeffrey E. Telschow
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Abstract
Tetraalkyl silicates are produced by the reaction of silicon metal with an alkanol in the presence of an alkali metal salt of an alkoxyalkoxy alcohol or a polyalkylene glycol in either an alkoxyalkoxy alcohol or a polyalkylene glycol or mixtures thereof and recovery of the product. Tetramethyl silicate and tetraethyl silicate are the preferred products. The preferred alkoxyalkoxy alcohol is 2-(2-butoxyethoxy)ethanol. The preferred glycol is diethylene glycol. An indifferent solvent and/or a hydroxide-scavenger may be employed in the reaction mixture.
Claims23
A process for the production of tetraalkyl orthosilicates which comprises reacting a source of silicon metal with an alkanol having 1 to 6 carbon atoms in the presence of an alkali metal salt of a high-boiling alcohol selected from the group consisting of compounds of the formula R"O(CHR"'CH.sub.2 O).sub.n H where R" is hydrogen, ethyl, butyl, methyl, propyl, hexyl, cyclohexyl, or 2-ethylhexyl, R"' is hydrogen or methyl, n is equal to 2, 3, or 4, their isomers or mixtures thereof.
In a process for the production of tetraalkyl orthosilicates by reacting a source of silicon metal with an alkanol having 1 to 6 carbon atoms in the presence of an alkali metal salt of an alcohol the improvement which comprises employing a hydroxide-scavenger.
Dependencies are inferred from the claim text.