Method for stabilizing phosphorus trichloride
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United States of America Patent
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Sep 15, 1992
Grant Date -
N/A
app pub date -
Mar 6, 1991
filing date -
Jun 7, 1989
priority date (Note) -
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Abstract
The invention relates to a method for the stabilization of phosphorus trichloride, wherein one or more derivatives of dithiocarbamic acids are added to the phsophorus trichloride. As derivatives, salts, esters or thiuram sulfides of the dithiocarbamic acids, individually or as a mixture, are preferred. The amounts used generally fall within the range of 10.sup.-4 % to 10.sup.-2 %, based on the amount of phosphorus trichloride. Derivatives, which are only slightly soluble in phosphorus trichloride are advantageously used in amounts of more than 10.sup.-2 %. Due to the inventive addition of derivatives of dithiocarbamic acids, the formation of phosphorus oxychloride in the phosphorus trichloride is delayed significantly and reduced to a minimum value.
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