Title:
METHOD FOR PURIFYING FUME CONTAMINATED BY HYDROGEN CHLORIDE AND HEAVY METALS, RENDERING INERT SAID HEAVY METALS AND UPGRADING SAID HYDROGEN CHLORIDE
Document Type and Number:
WIPO Patent Application WO2000029095
Kind Code:
A8
Abstract:
The invention concerns a combined method for purifying fume contaminated by hydrogen chloride and heavy metals, rendering inert the heavy metals and upgrading the hydrogen chloride, which consists in: subjecting the fume (6) to a treatment, by dry or semi-humid process, with a basic reagent (8) comprising a soda compound; collecting from said treatment a solid residue (13) containing the heavy metals; dispersing the solid residue and a hydraulic binder (18) in water (20) to form an aqueous broth (21); and extracting from the broth the solid mass (28) which is eliminated, and an aqueous solution (29).
Inventors:
HUMBLOT CEDRIC (FR)
Application Number:
PCT/EP1999/008141
Publication Date:
August 17, 2000
Filing Date:
October 21, 1999
Export Citation:
Assignee:
SOLVAY (BE)
HUMBLOT CEDRIC (FR)
HUMBLOT CEDRIC (FR)
International Classes:
B01D53/64; B01D53/68; B01D53/74; (IPC1-7): B01D53/73; B01D53/68; B01D53/64
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