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US 5,202,106 AGranted
Purification of hydrochloric acid with ferric chloride pretreated activated carbon
AssigneeSolvay SA
InventorNoel Vanlautem
Life of this patent
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Abstract
The present invention relates to a process for the pretreatment of activated carbon, capable of being employed especially for the purification of concentrated solutions of hydrochloric acid.
Claims4
A process for the purification of a hydrochloric acid solutions, comprising treating a hydrochloric acid solution with pretreated activated carbon prepared by treating said activated carbon with an aqueous concentrated hydrochloric acid solution of ferric chloride salt, in which the concentration of acid in water is equal to or higher than about 10% by weight and the concentration of ferric chloride is at least equal to about 3 g/l.
Dependencies are inferred from the claim text.