What is aluminum sulfate?
Aluminum sulfate, which is also called white alum, is the second most used salt after aluminum oxide. The chemical formula of this material is Al2(SO4)3. Aluminum sulfate dissolves in water but will not dissolve in ethanol. When white alum is mixed with water, its pH drops to less than 2.
To buy and inquire about the price of aluminum sulfate, contact the experts of Andisheh Mehrarai Sepahan.
The molar mass of this crystalline material is 342.15 g/mol. Aluminum sulfate is also known as paper alum, alum cake, acid aluminum. If this material is not packed properly, it will become lumpy because it absorbs water and moisture. It also turns into a powder when the humidity decreases. This substance is used in water purification as a coagulant and in the paper industry, etc. Aluminum sulfate is stable, non-toxic and acidic
Method of production of aluminum sulfate
In the production of aluminum sulfate, mineral bauxite is first synthesized with sulfuric acid. Its chemical equation is as follows.
Al 2 O 3 + H 2 SO 4 ———> Al 2 (SO 4 ) 3 + 3 H 2 O
By neutralizing aluminum hydroxide and sulfuric acid, aluminum sulfate is formed.
2Al (OH) 3 + 3 H 2 SO 4 + 12 H 2 O ———> Al 2 (SO 4) 3 .18 H 2 O
In the reaction of sulfuric acid with aluminum, ammonium sulfate is formed and hydrogen molecules are released as gas.
2Al + 3 H 2 SO 4> -> Al 2 (SO 4) 3 + 3 H 2
This substance is formed from the reaction of sulfuric acid with precipitated aluminum hydroxide. After drying, this substance becomes crystalline and can be granular or powdery.
2Al(OH)3+3H2SO4 → Al2(SO4)3+6H2O
6 Application of aluminum sulfate
Coagulant in water treatment
Aluminum sulfate is one of the most widely used chemicals in water, sewage and wastewater treatment. This substance is a coagulant with a very high property that settles 99% of excess materials and impurities and creates sediment and sludge. In this process, additional materials are attached to larger particles and these particles are settled and separated from the water. These contaminants are easily separated from the tank and get stuck in the filters placed in the process path.
Due to the cheap price and easy application of aluminum sulfate, its use has been expanded in the water and wastewater treatment industry. This substance is the main source of hydrogen sulfide, but the amount of its use should be measured because its excessive consumption causes water pollution and makes its result ineffective. Polyaluminum chloride and hydrated lime are also used for water purification.
Aluminum sulfate in the paper industry
In the past, aluminum sulfate was used for paper making. Now advanced machines have replaced this material, but they still use this material in its pulp to produce paper. This chemical substance with high coagulating power gives strength and gloss to the paper. It also connects the particles of paper pulp and keeps these particles together. For this reason, the force of attraction between the fibers will increase and the paper will be stronger. Aluminum sulfate is also used as fabric color stabilizer.
White alum and leather industry
In leather, aluminum sulfate is used to produce belts, gloves, etc. In the leather industry, when animal hides are tanned and ready for tanning, they are treated with chemicals. In this process, aluminum sulfate, sodium chloride, flour and sodium carbonate are applied to the skin. A mixture containing ammonium sulfate prevents the skin from rotting.
Use of aluminum sulfate in dyeing
This substance is used as a stabilizer in the process of dyeing and printing on clothes. When aluminum sulfate is dissolved in alkaline water, gelatinous aluminum hydroxide is produced, which binds the dye molecules to the fabric and makes the dye insoluble in water. does
Aluminum sulfate in fire fighting
In the production of firefighting foams, this material is used as a foaming agent.
Cosmetics industry
This chemical has an antibacterial property, which has made it widely used in the cosmetic industry and used to produce cosmetic products. This property has caused that different forms of this substance can be used in the production of antiperspirants and deodorants.
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Physical and chemical properties
The appearance of this substance is powdery, granular or white crystalline.
The molecular weight of aluminum sulfate is 342.31 g/mol in the anhydrous state.
Alum is odorless and has a relatively sweet taste.
Its melting point in anhydrous form is equal to 770 degrees Celsius.
The solubility of this substance in water is such that 31.2 grams dissolve in 100 ml at 0 degrees and 36.4 grams at 20 degrees and 89 grams at 100 degrees can be dissolved in 100 ml of water.
Aluminum sulfate is slightly soluble in ethyl alcohol.
This substance is stable in air.
When aluminum sulfate reaches its melting point, it decomposes and releases sulfur oxide, which is a toxic gas.
The solution of this substance is inedible and causes corrosion and decay of metals in the presence of moisture.
The price of aluminum sulfate in Andisheh Mehararai Sepahan
Andisheh Mehararai Sepahan Company, the Manufacturer of polyaluminum chloride and the largest producer of chlorofric, producer of aluminum sulfate 17% is one of the top providers and producers of this product. Amas company supplies all chemicals needed by producers with the best quality and the most valuable price. To buy aluminum sulfate, visit our contact page and get in touch with our experienced experts.
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