It is the raw material for producing potassium carbonate, potassium acetate and potassium arsenite. It can be used as fire extinguishing agent for petroleum and chemicals. It can also be used in medicine and baking powder.

Carbonation raw material potassium carbonate can be used as third-grade product. Soil alkali can also be used as raw material, which contains 40% ~ 60% potassium carbonate, 10% ~ 15% potassium sulfate and 3.5% potassium chloride. Before feeding, organic matters should be removed by calcination, potassium sulfate and potassium chloride should be removed by different solubility, and impurities such as silicon, aluminum and phosphorus can be removed by adding lime milk or magnesium carbonate through pressure filtration. The filtrate is evaporated to prepare potassium carbonate solution, so that the total alkali concentration is 750 ~ 800 g/L. At the temperature above 50℃ and the reaction pressure of 0.4MPa, carbon dioxide (concentration above 30%) was introduced to carbonize, and potassium bicarbonate was continuously precipitated with the increase of concentration. After carbonization for 5-6h, the mother liquor was crystallized, washed, centrifuged and dried at 80℃ to obtain the finished product of potassium bicarbonate. The potassium chloride solution of the chemical book K2CO3+CO2+H2O → 2HCO3 ion exchange method flows through the ion exchange column to remove calcium and magnesium, so that the sodium-type resin (R-Na) becomes potassium-type (R-K). After washing with soft water to remove chloride ions, the ammonium bicarbonate solution flows downstream through the resin exchange column to obtain a mixed dilute solution of potassium bicarbonate and ammonium bicarbonate, which is decomposed into potassium carbonate by evaporation, and the solution is sent to the carbonization tower. R-na+KCl → r-k+naclr-k+nh4hco3 → r-NH4+khco32khco3 → k2co3+CO2 ↑+h2k2co3+CO2+H2O → 2khco3