Dehydration magnesium chloride utilizing alcohol solution and ammonia

Claim 1

PROCESS FOR THE PRODUCTION OF HIGH QUALITY ANHYDROUS MAGNESIUM CHLORIDE FROM CARNALLITE WHICH COMPRISES HEATING THE CARNALLITE IN A ROASTING ZONE UNDER TEMPERATURE TION THEREFROM, THEREAFTER DISSOLVING THE DEHYDRATED MAGNESIUM CHLORIDE IN A SOLVENT, FILTERING THE SOLUTION TO REMOVE UNDISSOLVED IMPURITIES INCLUDING POTASSIUM CHLORIDE THEREFROM, TREATING THE SOLUTION IN AN INITIAL REACTION ZONE WITH AMMONIA GAS UNDER CONDITIONS TO PRECIPITATE MAGNESIUM CHLORIDE AMMONIATE, SEPARATING THE PRECIPITATE FROM THE SOLVENT, PASSING THE PRECIPITATE IN A DRYING ZONE TO REMOVE THE LAST TRACES OF SOLVENT THEREFROM BY TREATMENT WITH ADDITIONAL AMMONIA GAS, THEN SUBJECTING THE DRIED MAGNESIUM CHLORIDE AMMONIATE IN A SECONDARY REACTION ZONE TO CONDITIONS TO DECOMPOSE THE SAME INTO AMMONIA AND INTO A HIGH-QUALITY, ANHYDROUS MAGNESIUM CHLORIDE PRODUCT.