Treatment of used sulfuric acid

C - Chemistry – Metallurgy – 01 – G

Patent

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Details

C01G 23/047 (2006.01) C01F 11/46 (2006.01) C02F 1/52 (2006.01) C02F 1/66 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2083091

La présente invention traite des améliorations apportées à l'élimination des impuretés générées sous forme d'acide sulfurique usé lors de la fabrication de pigments de titane via le procédé au sulfate. La neutralisation de cet acide usé produit, d'une part, un matériau de valeur commerciale: le gypse; et d'autre part, des boues résiduelles qui après avoir été traitées selon les revendications du présent brevet, sont aptes à l'enfouissement sanitaire.

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