A METHOD OF PREPARING STABLE POLY ALUMINUM CHLORIDE (PAC) LIQUID AND IMPROVING THE STABILITY OF PAC POWDER

摘要

The invention describes method of preparing stable poly aluminium chloride (PAC) liquid by reacting alumina trihydrate with hydrochloric acid (HCl). The invention is directed to the products made by the disclosed process. The products formed by the present invention are comprised by adding a salt of a mineral acid other than HCl and H2SO4 in the PAC liquid before or after the reaction and spray drying the same to powdered PAC. The invention also relates to a method of improving the stability of poly aluminium chloride (PAC) powder.