Abstract: The addition of an alkali to aluminum sulfate raises the pH, increases that cationic charge, improves performance as compared to aluminum sulfate alone and causes the aluminum sulfate to be non-corrosive to skin and metal. The addition of a minor quantity of phosphoric acid also provides added stability to the product.

Abstract: A method of making a concentrated, stable aluminum compound containing water treatment product comprising reacting an aluminum compound in solution form with a phosphoric acid compound at a temperature in the range of about 15° C. to about 98° C., measuring the aluminum as aluminum oxide content and adding water to the reaction product if needed to prepare a product having an aluminum oxide content of about 10 percent by weight of the solution. The process is particularly advantageous in providing a system for the production of aluminum water treating products by recycling aluminum waste metal such as beverage containers utilizing a phosphoric acid medium.

Abstract: The addition of an alkali, preferably hydrated lime to aluminum sulfate raises the pH, increases that cationic charge, improves performance as compared to aluminum sulfate alone and causes the aluminum sulfate to be non-corrosive to skin and metal. The addition of a minor quantity of phosphoric acid also provides added stability to the product.