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:
Jul. 06, 1976
Filed:
Apr. 28, 1975
Jean Guerin, Grenoble, FR;
Produits Chimiques Ugine Kuhlmann, Paris, FR;
Abstract
Perchloromethyl mercaptan is prepared with about 10% saving in raw materials by an improved process comprising (i) chlorinating carbon disulfide in the presence of iodine to produce a first chlorinated liquor, (ii) separating said liquor by distillation into a high-boiling fraction of technical-grade perchloromethyl mercaptan and a low-boiling fraction, A, (iii) chlorinating fraction A in the presence of iodine and absence of any substantial amount of metallic halides to produce a second chlorinated liquor, (iv) separating said second liquor by distillation into a high boiling fraction of crude perchloromethyl mercaptan and a second low-boiling fraction, B, consisting essentially of sulfur dichloride, and (v) heating fraction B at about 90.degree.-150.degree.C in presence of a metallic halide to form sulfur monochloride and regenerate chlorine.