The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1992
Filed:
Mar. 06, 1991
Rudolf Schumann, Raguhn, DE;
Chemie AG Bitterfeld-Wolfen, Bitterfeld, DE;
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.