Although basic aluminum chloride is a traditional water purification agent, its excellent effect still has a certain market advantage. Basic aluminum chloride has a unique effect in the treatment of highly polluted wastewater in papermaking and printing and dyeing industries.

The water purification effect of basic aluminum chloride is closely related to its basicity. The higher the basicity, the better the water purification effect of basic aluminum chloride. Therefore, the test of basicity of basic aluminum chloride is very important.

The basicity test method of basic aluminum chloride is as follows: take the sample of basic aluminum chloride, dissolve it, add quantitative hydrochloric acid, then mask aluminum ion with potassium fluoride, titrate it with strong sodium oxide standard titration solution, and generally use phenolphthalein indicator solution, such as ethanol solution. Weigh 500g of potassium fluoride, dissolve and dilute it with distilled water, add phenolphthalein indicator solution and adjust it with sodium hydroxide or hydrochloric acid solution to become red, filter the insoluble matter and store it in the bottle, and obtain the basicity of basic aluminum chloride through relevant test data.

Basic aluminum chloride has made outstanding contributions to the early water treatment. With the progress and development of science and technology, better water purification products have gradually replaced the market of basic aluminum chloride. However, after technological innovation, basic aluminum chloride still has excellent effect in water treatment, especially the high-purity and high basicity basic aluminum chloride.