Process for the preparation of sulphate of potash by a wet route from carnallite and a sulphated derivative chosen from sodium sulphate and epsomite

摘要

Process for the preparation of sulphate of potash by conversion, in aqueous medium, of schoenite, characterised in that the said schoenite is prepared by reacting carnallite 4 in an aqueous medium 2 saturated with a sulphate compound 3 chosen from sodium sulphate and epsomite and in that the schoenite obtained is recovered by flotation 7. <IMAGE>