BASIC ALUMINUM HYDROXYCHLOROSULFATE PROCESS AND PRODUCT THEREFROM

摘要

In the preparation of aluminum hydroxychlorosulfate (BACS) by reacting a solution of a basic aluminum halide with a sulfate ion derived from sulfuric acid or aluminum sulfate, the products formed have some utility in water treatment but lack sufficient effectiveness in cold water or low alkalinity waters to be commercially acceptable. An improved product effective for the treatment of cold water or low alkalinity water is prepared by introducing a calcium ion in the form of calcium sulfate dihydrate, calcium carbonate, calcium chloride, calcium hydroxide, or a mixture thereof into the reaction mixture in an amount effective to improve product efficacy while not producing calcium sulfate precipitate by product.