Programme Of Preparation Of Polyaluminium Chloride
Synthesis of polymeric aluminum chloride by using aluminum raw materials mainly for aluminum processing waste, such as aluminum and aluminum and aluminum scrap. By aluminum ash according to a certain ratio while stirring slowly adding hydrochloric acid to the reaction and by maturing aggregation, sedimentation liquid polyaluminium chloride, then filter by dilution, concentration, drying. In the process can be divided into the acid, alkali neutralization method, 3. Acid is mainly used to HCl, product quality is difficult to control; alkali process difficult, equipment investment is large and NaOH, pH control of raw material, high cost; and the most used method, as long as the control ratio, generally meet the national standards.