Process for the treatment of coal assets and pre process for purifying solutions of hydrochloric acid

摘要

Process for pretreatment of active carbon, capable of being employed especially for purifying concentrated solutions of hydrochloric acid, in which, before being used, the active carbon is treated with a concentrated solution of ferric chloride salt in acidified water with a pH lower than or equal to 3 until the reducing properties of the active carbon towards the ferric ions have disappeared.