| 摘要 |
Production of dialkylphosphine oxides of the general formula: <IMAGE> in which R1 and R2 each stand for an alkyl group having from 1 to 4 carbon atoms by subjecting a dialkylchlorophosphine of the general formula: <IMAGE> in which R1 and R2 have the meanings given above, or an addition product thereof with hydrogen chloride, to alcoholysis with an aliphatic C1 - C4 alcohol in the presence of a protective gas at temperatures between -30 DEG and +30 DEG 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.
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