Sulfate type of potassium salt and potassium salt lake brine as raw materials to take. Can also be used 98% sulfuric acid and potassium chloride at 550 ℃ high temperature reaction, the direct preparation of potassium sulfate, hydrogen chloride produced during the reaction, water absorption, by-product hydrochloric acid, this method is the main method of industrial production of potassium sulfate, called Manhamm method. Alunite reduction pyrolysis method in the system.
In Germany, potassium sulfate mainly by magnesium sulfate and potassium chloride in the liquid phase reaction to produce.
By sulfuric acid and potassium chloride reaction in the system. Mixed with sulfuric acid and potassium hydroxide can also be potassium sulfate: HSO + 2KOH = KSO + 2HO to potassium chloride and mixed salt preparation of potassium sulfate technology
The production method of the process is that the high temperature salt produced in the production of bitter halide chloride is used as the raw material, and the high temperature salt is transformed with the potassium chloride to obtain the mixture of the potassium magnesium alum and the sodium chloride. Adding the fatty acid amine salt collector and the terpene alcohol foaming agent and the mother liquor produced by the system into a slurry to carry out flotation separation in the flotation machine to obtain the soft potassium magnesium alum and the industrial salt. The potassium permanganate is separated from potassium chloride in aqueous solution by secondary conversion to give potassium sulfate. Process attached to the production of alum mother liquor, salt lotion, etc. for the production of potassium chloride halide process. In this method, two kinds of raw materials, high temperature salt and potassium chloride, are separated from the waste residue of the salt chemical plant by two conversion and one flotation, simultaneously obtaining two products of potassium sulfate and sodium chloride. In this method, 8,000 tons / year potassium sulfate production workshop was built in the third chemical plant of Hangu Saltworks. One ton of potassium sulfate consumes 1.15 tons of potassium chloride and 3.0 tons of high-temperature salt, while by-product of 1.20 tons of sodium chloride.
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