Removal of contaminants from by-product acids

Details Removal of contaminants from by-product acids Removal of contaminants from by-product acids

B - Operations, Transporting

01

D

B01D 9/02 (2006.01)

Patent

CA 2685200

The present invention is drawn to a method for removing colloidal titanium dioxide and titanium oxychloride from by-product hydrochloric acid. The method includes adding phosphate ion source and quaternary amine to the by-product acid to cause the titanium dioxide and the titanium oxychloride to form a precipitate. The precipitate can then be separated from the acid, thus producing a decontaminated hydrochloric acid product with reduced levels of titanium.

La présente invention concerne un procédé d'élimination de dioxyde de titane colloïdal et d'oxychlorure de titane à partir de l'acide chlorhydrique résiduaire. Le procédé comprend l'ajout de source d'ions de phosphate et une amine quaternaire à l'acide résiduaire pour entraîner la formation d'un précipité par le dioxyde de titane et l'oxychlorure de titane. Le précipité peut ensuite être séparé de l'acide, produisant ainsi un produit à base d'acide chlorhydrique décontaminé avec des niveaux réduits de titane.

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