Physical and chemical properties of aluminium hydroxide

the following by appropriate xin chemical finishing for everybody introduces physical and chemical properties of aluminum hydroxide as follows:

general so-called aluminum hydroxide is actually refers to the 3 oxidation 2 aluminium hydrate. As to aluminum salt solution adding ammonia water or alkali and get white colloidal precipitation, its water content, composition and uneven, collectively known as hydrated alumina. Only in the aluminate solution, With Al ( 哦) 4 - Ions) The solution of CO2 can get real aluminium hydroxide. Crystallization of aluminum hydroxide with different hydrated alumina, soluble in acid, heated to 373 k is not dehydration, heat for 2 h at 573 k can be transformed into partial aluminum hydroxide ( AlO（ 哦) ） 。 Both sexes hydroxide aluminum hydroxide. Due to the existence of two kinds of ionized form, is a weak acid, can have a chemical formula H3AlO3 acid type, and weak base, can have a base type chemical formula Al ( 哦) 3. Aluminum hydroxide with both sexes, can react with acid can react with alkali. The acidity of aluminum hydroxide is that it is a lewis acid can be added and OH - To reflect basic Al ( 哦) 3 because of the existence of two kinds of ionization can produce two kinds of salt: two aluminum salt: ___________ aluminium salts: Al3 + AlCl3, KAl ( 哌嗪 2· 12H2O（ Alum) 。 Their solution for the hydrolysis of Al3 + acid respectively add AgNO3 and dilute nitric acid, a white precipitate of Cl - ； Light yellow precipitate of Br - ； For I - yellow precipitate 2. Partial aluminate, AlO2 - NaAlO2,KAlO2. Their aqueous alkaline: AlO2 - +2H2O→ Al( 哦) 3 +哦- - - When two kinds of salt, namely double hydrolysis reaction, generate Al ( 哦) 3Al3++3AlO2- +6H2O==4Al( 哦) 3↓ Aluminum hydroxide are 325 mesh, 800 mesh, 1250 mesh, 5000 mesh four specifications. White powder solid. Almost insoluble in water, can condense the suspended solids in the water, the adsorption of pigment.

above is appropriate xin chemical industry to introduce the physicochemical properties of aluminum hydroxide, more information, welcome to contact the appropriate xin chemical product and price, appropriate xin chemical 32 years focused on the wholesale supply aluminum hydroxide.