PAC introduction: Poly aluminium Chloride (PAC) is high-efficient, cheap and nontoxic inorganic high ... of purifying various kinds of water source. 1. Purify industrial water, industrial sewage, mine reinjection water, oilfield reinjection water, metallurgical ... , leather sewage and all kinds of chemical sewage. 2. Industrial production: Paper sizing, dye printing, bleaching and dyeing, medicine ...