Highly pure monoalkylphosphine

Details Highly pure monoalkylphosphine Highly pure monoalkylphosphine

1993-07-15

1994-10-11

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus containing

C07F 950

Patent

active

053549180

ABSTRACT:
The method for preparing a monoalkylphosphine of high purity comprises reacting phosphine and an alkene in the presence of an anhydrous alkanesulfonic acid as a catalyst in a solvent having a boiling point higher than that of the monoalkylphosphine produced. The resulting monoalkylphosphine is brought into contact with an alkali solution to remove the catalyst, which is a sulfur atom-containing compound, remaining in the solution. The reaction solution from which the remaining catalyst is removed is then brought into contact with alkali metal hydrides or alkaline earth metal hydrides to eliminate any moisture remaining in the reaction solution. The alkali metal hydride is preferably sodium hydride or lithium aluminum hydride, while the alkaline earth metal hydride is preferably calcium hydride. The resulting monoalkylphosphine is isolated through distillation and the compound in a gaseous or liquid state is brought into contact with and passed through a layer of active carbon to remove other impurities present therein.

REFERENCES:
patent: 2584112 (1952-02-01), Brown
patent: 4922025 (1990-05-01), Hoelderich et al.
patent: 5041676 (1991-08-01), Hofmann
Hoff et al., Journal of Organic Chemistry, (24) pp. 356-359, 1959.
Chemical Abstracts, vol. 117, 1992, Columbus, Ohio, US; abstract No. 171693s, & JP-A-04 149 187 (Nippon Mining Co., Ltd.).

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