The preparation method of aluminum sulfate

Preparation of aluminum sulfate in two ways, one is pressurized by the bauxite and sulfuric acid reaction, and the other is to make sulfuric acid decomposition alunite, kaolin and alumina containing silicon feedstock can produce aluminum sulfate. Sulfuric acid step was pulverized to a particle size of the bauxite, the addition of the reactor and wherein the sulfuric acid reaction, the reaction liquid after the period of time after settling, the supernatant neutralized by adding sulfuric acid to neutral or slightly alkaline.

Then concentrated to one hundred and fifteen degrees Celsius, solidified by cooling, crushing prepared products. Its chemical reaction equation is: A12O3 +3 H2SO4 → A12 (SO4) 3 +3 H2O Preparation of anhydrous aluminum sulfate is pulverized to a particle size of bauxite, into a reaction kettle with sulfuric acid. Aluminum hydroxide and sulfuric acid reaction, the insolubles were filtered off and recrystallized derived. Crystallized from the acidic solution of aluminum sulfate hydrate crystals generated slowly heated, it gradually dehydration, the temperature rose to a certain extent, it can be completely anhydrous aluminum sulfate dehydration.

Pre:High solubility of aluminum sulfate    Next:High solubility of aluminum sulfate