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:
Apr. 29, 2003
Filed:
Aug. 08, 2001
Luciano A. Gonzalez, Ancaster, CA;
Blair F. Sim, Brampton, CA;
Henry E. Kowalyk, Burlington, CA;
James D. Harcus, Toronto, CA;
Kinectrics Inc., Toronto, CA;
Abstract
A two step process for destruction of polyhalogenated aromatic compounds contained in pitch from ballasts of fluorescent lamps comprises: (a) contacting the pitch with a sufficient amount of an organic solvent such that the pitch and the solvent together form a liquid phase in which the polyhalogenated aromatic compounds are dissolved; and (b) chemically destroying the polyhalogenated aromatic compounds in the liquid phase. In preferred embodiments of the process, the solvent comprises mineral oil and the polyhalogenated aromatic compounds comprise polychlorinated biphenyls. Chemical destruction of the polyhalogenated aromatic compounds preferably comprises treatment with an alkali metal dispersion, preferably sodium metal in mineral oil.