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Poly Aluminum Chlorohydrate applications properties production
Poly Aluminum Chlorohydrate
Poly Aluminum Chlorohydrate is an important substance in the field of chemistry. It has unique applications, properties and production methods.
Applications
Poly Aluminum Chlorohydrate is widely used in water treatment. In drinking water treatment, it can efficiently remove suspended impurities and colloidal substances in water, purifying water quality and ensuring the safety of people's drinking water. Because it can quickly condense fine particles in water, form larger flocs, and accelerate the precipitation process, it significantly improves the clarity of water. In the field of wastewater treatment, polyaluminum chloride also plays a key role. Whether it is industrial wastewater or domestic wastewater, its characteristics can be used to achieve the separation and removal of pollutants. For example, in the treatment of printing and dyeing wastewater, it can effectively remove dye particles and other pollutants in wastewater, reduce the chromaticity and chemical oxygen demand (COD) of wastewater, and help wastewater discharge standards. In addition, in the paper industry, polyaluminum chloride can be used as a sizing and precipitating agent to enhance the water resistance and strength of paper; in the pharmaceutical industry, in the purification process of some drug production processes, it can also rely on its agglomeration effect to separate impurities and improve the purity of drugs.
Properties
Polyaluminum chloride is mostly yellow or light yellow solid powder in appearance, and also has a liquid form. It is easily soluble in water, and hydrolysis reactions occur during the dissolution process to generate a variety of hydroxyl aluminum ions. These ions have strong adsorption and bridging capabilities, which is the key to polyaluminum chloride's agglomeration. In terms of chemical properties, polyaluminium chloride is acidic, and the pH value of its aqueous solution is usually between 3.5 and 5.0. Under different pH conditions, the morphology and activity of its hydrolyzate vary. In a weakly acidic to neutral environment, polyaluminium chloride has the best coagulation effect and can form a stable and large flocculent structure. At the same time, polyaluminium chloride also has good thermal stability. In a certain temperature range, its chemical properties will not change significantly, which is conducive to storage and transportation.
Production (Production)
There are various production methods of polyaluminium chloride. A common one is the aluminum ash acid dissolution method. This method uses aluminum ash as the main raw material, which is the waste residue generated during aluminum processing. First, the aluminum ash and hydrochloric acid are mixed in a certain proportion, and the reaction is carried out under suitable temperature and stirring conditions. During the reaction process, the aluminum and its compounds in the aluminum ash chemically react with hydrochloric acid to form an aluminum chloride solution. After that, by controlling the reaction conditions, such as temperature, time, and concentration of reactants, the solution undergoes hydrolysis polymerization to gradually form polyaluminum chloride. After the reaction is completed, the unreacted impurities are removed through precipitation, filtration and other processes to obtain a relatively pure polyaluminum chloride solution. If it is necessary to make a solid product, the liquid polyaluminum chloride is further converted into a solid powder product through evaporation, concentration, drying and other processes. In addition, there are production processes such as aluminum hydroxide method and aluminum trichloride method. The aluminum hydroxide method uses aluminum hydroxide as raw material and reacts with hydrochloric acid to obtain polyaluminum chloride; the aluminum trichloride method uses aluminum trichloride as the starting material and adjusts the reaction conditions to achieve hydrolytic polymerization to produce polyaluminum chloride. Different production methods have their own advantages and disadvantages, and need to be comprehensively selected according to actual needs and raw material sources.
Poly Aluminum Chlorohydrate is an important substance in the field of chemistry. It has unique applications, properties and production methods.
Applications
Poly Aluminum Chlorohydrate is widely used in water treatment. In drinking water treatment, it can efficiently remove suspended impurities and colloidal substances in water, purifying water quality and ensuring the safety of people's drinking water. Because it can quickly condense fine particles in water, form larger flocs, and accelerate the precipitation process, it significantly improves the clarity of water. In the field of wastewater treatment, polyaluminum chloride also plays a key role. Whether it is industrial wastewater or domestic wastewater, its characteristics can be used to achieve the separation and removal of pollutants. For example, in the treatment of printing and dyeing wastewater, it can effectively remove dye particles and other pollutants in wastewater, reduce the chromaticity and chemical oxygen demand (COD) of wastewater, and help wastewater discharge standards. In addition, in the paper industry, polyaluminum chloride can be used as a sizing and precipitating agent to enhance the water resistance and strength of paper; in the pharmaceutical industry, in the purification process of some drug production processes, it can also rely on its agglomeration effect to separate impurities and improve the purity of drugs.
Properties
Polyaluminum chloride is mostly yellow or light yellow solid powder in appearance, and also has a liquid form. It is easily soluble in water, and hydrolysis reactions occur during the dissolution process to generate a variety of hydroxyl aluminum ions. These ions have strong adsorption and bridging capabilities, which is the key to polyaluminum chloride's agglomeration. In terms of chemical properties, polyaluminium chloride is acidic, and the pH value of its aqueous solution is usually between 3.5 and 5.0. Under different pH conditions, the morphology and activity of its hydrolyzate vary. In a weakly acidic to neutral environment, polyaluminium chloride has the best coagulation effect and can form a stable and large flocculent structure. At the same time, polyaluminium chloride also has good thermal stability. In a certain temperature range, its chemical properties will not change significantly, which is conducive to storage and transportation.
Production (Production)
There are various production methods of polyaluminium chloride. A common one is the aluminum ash acid dissolution method. This method uses aluminum ash as the main raw material, which is the waste residue generated during aluminum processing. First, the aluminum ash and hydrochloric acid are mixed in a certain proportion, and the reaction is carried out under suitable temperature and stirring conditions. During the reaction process, the aluminum and its compounds in the aluminum ash chemically react with hydrochloric acid to form an aluminum chloride solution. After that, by controlling the reaction conditions, such as temperature, time, and concentration of reactants, the solution undergoes hydrolysis polymerization to gradually form polyaluminum chloride. After the reaction is completed, the unreacted impurities are removed through precipitation, filtration and other processes to obtain a relatively pure polyaluminum chloride solution. If it is necessary to make a solid product, the liquid polyaluminum chloride is further converted into a solid powder product through evaporation, concentration, drying and other processes. In addition, there are production processes such as aluminum hydroxide method and aluminum trichloride method. The aluminum hydroxide method uses aluminum hydroxide as raw material and reacts with hydrochloric acid to obtain polyaluminum chloride; the aluminum trichloride method uses aluminum trichloride as the starting material and adjusts the reaction conditions to achieve hydrolytic polymerization to produce polyaluminum chloride. Different production methods have their own advantages and disadvantages, and need to be comprehensively selected according to actual needs and raw material sources.
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