Method for stabilizing phosphorus trichloride

Details Method for stabilizing phosphorus trichloride Method for stabilizing phosphorus trichloride

1991-03-06

1992-09-15

Lewis, Michael

Chemistry of inorganic compounds

With additive

423300, C01B 1102

Patent

active

051476215

ABSTRACT:
The invention relates to a method for stabilizing phosphorus trichloride. In order to delay the formation of phosphorus oxychloride in phosphorus trichloride and to reduce it to a minimum value which no longer adversely affects further processing, one or more amines which have at least two aromatic hydrocarbon groups linked to one nitrogen atom, such as diphenylamine, phenothiazine, phenyl-4-methylphenylamine and triphenylamine, are added to the phosphorus trichloride. The amines can also be added in the form of their salts, including their quaternary ammonium compounds, or their reaction products with phosphorus halides. The amounts of amines, added fall within the range of 10.sup.-6 % to 10.sup.-1 %, based on the amount of phosphorus trichloride.

REFERENCES:
patent: 3903002 (1975-09-01), Hotten
patent: 4197209 (1980-04-01), Zinke et al.
patent: 4846985 (1989-07-01), Rizvi et al.

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