Practical Guide to PAC Dosage Techniques

Polyaluminum Chloride (PAC), also known as basic aluminum chloride or coagulant, is a water-soluble inorganic polymer intermediate between AlCl₃ and Al(OH)₃. Its chemical formula is [Al₂(OH)_nCl_(6-n)]_m, where m represents the degree of polymerization and n indicates the neutrality level of the PAC product. PAC appears as a yellow, dark brown, or dark gray resinous solid with strong bridging adsorption properties. During hydrolysis, it undergoes physicochemical processes including coagulation, adsorption, and precipitation. Polyaluminum chloride is a cationic inorganic polymer flocculant composed of polyhydroxy, polynuclear complexes. The solid product appears as a pale yellow substance. Its notable characteristics include pronounced water purification effects, rapid flocculation and sedimentation, high activity, and no requirement for alkaline additives. It exhibits a wide pH adaptability range and low corrosion potential toward pipelines and equipment. This product effectively removes color, suspended solids (SS), chemical oxygen demand (COD), biological oxygen demand (BOD), and heavy metal ions such as arsenic and mercury from water. It is widely applied in drinking water, industrial water, and wastewater treatment fields. Properties of Polymerized Aluminum Chloride The fundamental difference between polyaluminum chloride and traditional inorganic coagulants lies in their structural composition. Traditional inorganic coagulants are low-molecular-weight crystalline salts, whereas polyaluminum chloride consists of structurally diverse polyhydric hydroxyl complexes. This amorphous inorganic polymer exhibits unique coagulation properties distinct from conventional coagulants. PAC products manufactured using the calcium aluminate adjustment method exhibit significantly enhanced basicity (alkalinity), delivering substantial economic benefits in both production and application. Basicity increases from 65% to 92%, reducing raw material costs by 10% and usage costs by 40%. The water purification efficacy of polyaluminum chloride surpasses that of comparable products produced via other manufacturing processes. Features of Polymerized Aluminum Chloride Polyaluminum chloride is chemically stable at room temperature and does not deteriorate during long-term storage. While the solid form readily absorbs moisture when exposed, it does not degrade and is non-toxic and harmless. The pH range for water adaptability is 4-14, but the optimal treatment range is pH 6-8. Highly adaptable to water treatment conditions, featuring rapid response, minimal chemical consumption, and low water production costs. Produces large flocs with rapid settling and excellent filtration properties, thereby enhancing equipment utilization rates. Applications of Polymerized Aluminum Chloride Purification and Recovery: River water, reservoir water, groundwater; purification of industrial feedwater, recovery of valuable substances from waste residues, promoting coal powder settling in coal washing wastewater, starch recovery in the starch manufacturing industry; Wastewater Treatment: Municipal sewage, textile dyeing wastewater, leather wastewater, fluoride-containing wastewater, heavy metal wastewater, oily wastewater, papermaking wastewater, coal washing wastewater, mining wastewater, brewing wastewater, metallurgical wastewater, meat processing wastewater; Other applications: paper sizing, sugar syrup refining, casting molding, fabric wrinkle prevention, catalyst carrier, pharmaceutical purification, cement rapid setting, cosmetic raw material. Aluminum Chloride Polymer Dosage Method First, dissolve the polyaluminum chloride at a ratio of 1:3, then dilute it to the appropriate concentration. Dosage depends on the wastewater characteristics, typically ranging from 5 to 100 grams per ton for liquid products and 20 to 25 kilograms per ton for solid products. The optimal dosage can be determined through laboratory testing. When preparing polyaluminum chloride, it can be added directly to water. The amount of water added should be determined based on the dosage and volume of water to be treated. After adding water, it should be thoroughly stirred. The main products of flocculant manufacturer Xinhuan Water Treatment are: White polyaluminium chloride (food grade), drinking grade polyaluminium chloride, industrial grade polyaluminium chloride, anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide, petroleum recycling polyacrylamide, oil recovery polyacrylamide, polyacrylamide, polymer flocculant polymer flocculation coagulant, polymeric ferrous sulphate, polymerized iron and aluminium chloride, and other water treatment chemicals. Welcome customers to write to us to negotiate business! Tel/WhatsApp：86 19139972558 Email：Sunny@xhwtm.com Contact:Sunny