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. 08, 1980
Filed:
Dec. 18, 1975
Jean G Guerin, Grenoble, FR;
Produits Chimiques Ugine Kuhlmann, Paris, FR;
Abstract
A method of preparing carbon tetrachloride of high purity from a crude mixture comprising lower aliphatic hydrocarbons, includes a step of liquid-phase chlorination at about 160.degree.-200.degree. C. and a step of vapor-phase chlorolysis at about 450.degree.-600.degree. C. in the presence of a metal chloride catalyst such as MoCl.sub.5. This method has both economic and anti-pollution advantages in the treatment of otherwise waste residues from the industrial manufacture of, for example, vinylchloride monomer, ethylene and propylene oxides or chloroprene. Carbon tetrachloride is an old product having known utilities as solvent for resins, waxes, lacquers and for dry cleaning; also as fire-extinguisher, extractor of seeds, anthelmintic in hookworms, exterminator of grain weevils, etc.