Highly pure monoalkylphosphine and method for producing same

Details Highly pure monoalkylphosphine and method for producing same Highly pure monoalkylphosphine and method for producing same

1997-11-25

1999-04-06

Geist, Gary

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

Organic compounds

Phosphorus containing

C07F 952

Patent

active

058921206

ABSTRACT:
A highly pure monoalkylphosphine which is useful as a starting material for producing a compound semiconductor, and a method for producing same in high yield are provided. A highly pure monoalkylphosphine represented by the general formula RPH.sub.2 (wherein R is an alkyl group having 1 to 8 carbon atoms) has a purity of not less than five nines, and is substantially free of sulfur and silica. In the method of producing said highly pure monoalkylphosphine, anhydrous hydrofluoric acid is used as a catalyst for a reaction between phosphine and an alkene, and the reaction is carried out in the presence of an organic solvent having a boiling point higher than that of the resulting monoalkylphosphine; the resulting reaction mixture is contacted with an alkali solution so that the remaining catalyst is removed into an aqueous phase in the form of a fluoride salt; next, the obtained reaction mixture is contacted with an alkali hydride and the impurities are removed, then distillation is carried out.

REFERENCES:
patent: 2584112 (1952-02-01), Brown
patent: 5260485 (1993-11-01), Calbick
patent: 5284977 (1994-02-01), Imori
patent: 5354918 (1994-10-01), Ohsaki

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