Aluminum Chloride Hexahydrate (AlCl₃·6H₂O) is an efficient inorganic coagulant widely applied in all segments of water treatment. When dissolved in water, it releases aluminum ions that hydrolyze to form positively charged hydroxyl-aluminum complexes and aluminum hydroxide colloids. These substances achieve water purification through charge neutralization, adsorption bridging and sweeping co-precipitation. Its detailed application scenarios are as follows:
Purification of Drinking Raw Water
It shows outstanding performance for low-temperature, low-turbidity and alkaline surface water or underground water. Even at water temperature down to 4°C, it can form dense flocs rapidly to remove suspended solids, turbidity, algae and natural organic matter efficiently. Besides, it works as an effective defluorinating agent to reduce fluorine content in high-fluoride groundwater up to safe drinking standards. It also eliminates yellowish color and peculiar odor caused by humus.
Municipal Sewage Treatment
Advanced phosphorus removal: Aluminum ions react with phosphate in wastewater to form insoluble aluminum phosphate precipitates, cutting total phosphorus to meet national discharge standards.
Reduction of SS and COD: It captures residual sludge debris and organic suspensions after biochemical treatment to clarify effluent and lower pollutant load.
Sludge conditioning: Proper dosage optimizes floc structure of sludge, decreases water content and reduces costs of sludge dewatering.
Treatment of Various Industrial Wastewater
Printing & dyeing wastewater: Quickly neutralize negatively charged dye colloids for over 90% decolorization rate, while removing textile auxiliaries and slurry to reduce COD.
Papermaking wastewater: Sedimentate tiny paper fibers and fillers for fiber recycling; lower water turbidity and SS to realize water reuse.
Electroplating & metallurgical wastewater: Adsorb heavy metals like copper, zinc, lead and cadmium via hydroxide colloids for stable heavy metal removal.
Oily wastewater for catering and machinery industry: Break emulsified oil droplets and adsorb floating oil to lower oil content in wastewater.
Coating and chemical wastewater: Remove pigment particles, resin suspensions and industrial impurities to ease the burden of subsequent biochemical treatment.
Circulating Water & Reverse Osmosis Pretreatment
In cooling circulating water systems for power plants and central air conditioners, it removes sediment and algae to avoid pipeline fouling and blockage. As a pretreatment chemical for electronic pure water RO systems, it eliminates colloids and suspended pollutants, mitigating membrane contamination and extending the service life of reverse osmosis membranes.
Raw Material for Polyaluminum Chloride (PAC) Production
High-purity aluminum chloride hexahydrate is a premium raw material to produce solid and liquid PAC. The manufacturing process is simple with low impurity risk, which is ideal for producing PAC used in drinking water treatment.
