PRODUCTION OF MAGNESIUM CHLORIDE BY DECOMPOSITION OF DOLOMITE FROM THE DEHKANABAD DEPOSIT INTO SULFURIC AND HYDROCHLORIC ACIDS

The decomposition process of dolomite from the Dehkanabad deposit by sulfuric acid and hydrochloric acid has been investigated.
The foaming process is eliminated by applying a surfactant. He showed that the higher the acid criterion, the lower the rate of
transition of the components to the liquid phase.The decomposition process of dolomite from the Dehkanabad deposit by sulfuric
acid and hydrochloric acid has been investigated. The foaming process is eliminated by applying a surfactant. It has shown that the
higher the acid criterion, the lower the rate of transition of the components to the liquid phase. Taking into account the acid
consumption, the decomposition rate, and the concentration of magnesium sulfate and magnesium chloride in the liquid phase, the
acid optimum criterion can be taken as 100-110% of the Stoichiometry. At the same time, the decomposition rate of calcium and
magnesium carbonates is in the range of 90-93.5%. A precipitate consisting of calcium sulfate and the mineral dolomite, which
does not decompose, is recommended for deposition as a building material. Magnesium chloride, dihydrous calcium sulfate
(gypsum), and building alabaster are obtained by crystallization from the liquid phase of the suspension. A block diagram for the
production of magnesium chloride in a cyclic manner has been developed.