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:
Feb. 10, 1998
Filed:
May. 09, 1996
Rene Cartier, Le Pontet, FR;
Thierry Longuet, Tresques, FR;
Roger Boen, St. Alexandre, FR;
Jean-Claude Bres, Mondragon, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
This invention relates to a process for treating fly ash produced by a waste incinerator and containing chlorides of toxic metals, which includes a step consisting of subjecting said fly ash to a phosphating reaction, at high temperature, to convert the chlorides of toxic metals into phosphates, the phosphating reaction being obtained by the addition of a reactant comprising a phosphorus compound, characterised in that said phosphorus compound is a non-metallic compound and in that the chlorinated products obtained are discharged in a gaseous form. It also relates to an installation for implementing this process.