Aluminium hydroxide (Aluminium hydroxide)

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Aluminium hydroxide

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Aluminium hydroxide
Aluminum hydroxide

21645-51-2

ALH6O3

81.027378

2818300000

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Nature Description

White crystalline powder. Insoluble in water and alcohol, soluble in inorganic acid and sodium hydroxide solution.

2.40

300℃

不溶

Product Applications

It is used in petroleum, chemical engineering, chemical fertilizer, natural gas, environmental protection and other industries. Its main function is to increase the distribution point of gas or liquid and support and protect catalysts with low strength. It is used to make waterproof fabrics, ink, glass, paper Filler, mordant, water purifier, various aluminum salts, etc.; Used as mordant, sub..

Production method

1. Add alkali solution in aluminum sulfate solution under stirring to generate precipitation. After washing, filtering and cryodrying, the finished product is prepared by crushing. The dehydrated paste can also be directly used as a product. The concentration, temperature, reaction temperature control and drying temperature of the solution in the preparation affect the product quality. Second, ammonium bicarbonate method will react sulfuric acid with aluminum powder or aluminum ash to generate aluminum sulfate, and then carry out double decomposition reaction with ammonium bicarbonate to produce aluminum hydroxide. Its 2Al(OH)3 3H2SO4→A12(SO4)3 6H2O A12(SO4)3 6NH4HCO3→2AI(OH)3 3(NH4)2SO4 6CO2↑ Sodium aluminate caustic soda and aluminum ash react at a ratio of 2:1 above 100℃ to prepare sodium aluminate solution. Sulfuric acid and aluminum ash react at 110℃ in 1.25:1 ratio to prepare aluminum sulfate solution. Then, sodium aluminate solution and aluminum sulfate solution are neutralized to pH 6.5 to generate aluminum hydroxide precipitation. After washing with water, pressure filtration, drying at 70 ~ 80℃ for 12 hours, and then crushing, the finished aluminum hydroxide product is prepared. Its A12O3 2NaOH → 2NaAO2 H2O Alumina 3h2so4→a12 (so4) 3 3H2O 6NaAIO2 A12(SO4)3 12H2O→8Al(OH)3↓ 3Na2SO4 Recycling method: After the recovered aluminum trichloride is dissolved in water, decolorized by activated carbon and filtered to remove impurities, it reacts with sodium carbonate to generate aluminum hydroxide. Then, it is filtered, washed and dried to obtain aluminum hydroxide products. Its 2A1C13 3Na2CO3 3H2O→2AI(OH)3↓ 6NaCl 3CO2↑ III. Ammonium bicarbonate method. Aluminum sulfate is generated by the interaction of sulfuric acid with aluminum powder or aluminum ash, and then redecomposed with ammonium bicarbonate to prepare aluminum hydroxide. 2Al(OH)3 3H2SO4→Al2(SO4)3 6H2OAl2(SO4)3 6NH4HCO3→2Al(OH)3↓ 3(NH4)2SO4 6CO2↑ IV. Sodium aluminate method. Sodium aluminate is prepared by reaction of sodium hydroxide and aluminum ash, and aluminum sulfate is prepared by reaction of sulfuric acid and aluminum ash, and then sodium aluminate and aluminum sulfate are carried out

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Dangerous Goods Marking： Xi

Safety instructions： S26: in case of contact with eyes, rinse with plenty of water immediately and send it to the doctor for diagnosis and treatment. S36: Wear a suitable protective clothes.