| 摘要 |
<p>1535711 Phosphine HOECHST AG 4 July 1977 [17 July 1976] 27882/77 Heading C1A In a process for the continuous production of phosphine by reacting yellow phosphorus with an aqueous alkali metal hydroxide solution in the presence of an alcohol, with the exclusion of oxygen, at 44 to 90‹ C., the phosphorus and alkali metal hydroxide solution being introduced separately from one another, the reaction is effected in two separate reaction stages, wherein, in the first reaction stage, the alkali metal hydroxide solution and phosphorus are continuously reacted with agitation in a molar ratio of 0.7:1 to 0.9:1, the resulting continuously produced gaseous phosphine is collected, and the resulting liquid phase material containing unreacted phosphorus is concurrently delivered to the second reaction stage; and, in the second reaction stage, the said unreacted phosphorus is reacted with further aqueous alkali metal hydroxide solution and the resulting gaseous reaction products are collected separately from the gaseous phosphine collected in the first reaction stage.</p> |
