What is Al2cl3MgO? Looks like flocculant. Who can be more specific?

Yes Inorganic flocculants can be divided into aluminum salt system and iron salt system according to metal salts; Aluminum salts are mainly aluminum sulfate and aluminum chloride, and iron salts are mainly ferric sulfate and ferric chloride. Later, on the basis of traditional aluminum salt and iron salt, new water treatment agents such as polymeric aluminum sulfate and polymeric ferric sulfate were developed and synthesized, which not only reduced the treatment cost, but also improved the efficacy. There are polyhydroxy complex ions in this kind of flocculant, which form polynuclear complex ions through OH- bridging, thus becoming a huge inorganic polymer compound with a relative molecular weight as high as 1× 105. The fundamental reason why inorganic polymer flocculant has higher capacity and better flocculation effect than other inorganic flocculants is that it can provide a large number of complex ions mentioned above and strongly adsorb colloidal particles, thus promoting colloidal coagulation through adhesion, bridging and crosslinking. At the same time, physical and chemical changes occurred, which neutralized the charges on the surfaces of colloidal particles and suspended solids, lowered the Zeta potential, repelled colloidal particles, destroyed the stability of micelles, and urged colloidal particles to collide with each other, thus forming flocculent condensed precipitation, with a surface area of (200- 1000)m2/g and strong water absorption. That is to say, the polymer not only has the function of adsorption destabilization, but also has the functions of adhesion, bridging and flocculation sweeping.