Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-09-30
1978-05-30
Sneed, Helen M. S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07F 953
Patent
active
040923630
ABSTRACT:
Production of dialkylphosphine oxides of the general formula: ##STR1## in which R.sup.1 and R.sup.2 each stand for an alkyl group having from 1 to 4 carbon atoms by subjecting a dialkylchlorophosphine of the general formula: ##STR2## in which R.sup.1 and R.sup.2 have the meanings given above, or an addition product thereof with hydrogen chloride, to alcoholysis with an aliphatic C.sub.1 - C.sub.4 alcohol in the presence of a protective gas at temperatures between -30.degree. and +30.degree. C, and subjecting the resulting alcoholysate to thermolysis. The compounds are more specifically produced by continuously adding the dialkylchlorophosphine component to the alcohol; subjecting the resulting alcoholysate to thermolysis in a heated separation zone; introducing into the separation zone, countercurrently to the alcoholysate, 10 to 150 l/h of a protective gas, per liter of alcoholysate; removing simultaneously from the separation zone the gaseous thermolysis products and, separately from said products, an alcoholic solutions containing desirable final product; neutralizing the alcoholic solution and recovering the final product from said solution in known manner.
REFERENCES:
patent: 3126416 (1964-03-01), Willans
patent: 3855311 (1974-12-01), Staendeke
Neumaier Hubert
Staendeke Horst
Hoechst Aktiengesellschaft
Sneed Helen M. S.
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