Potassium hydroxide can easily absorb water in air and deliquescence, and absorb carbon dioxide to form potassium carbonate. When dissolved in water, alcohol or treated with acid, it produces a lot of heat. Soluble in ethanol, slightly soluble in ether. It has strong alkalinity and corrosiveness, and its properties are similar to those of caustic soda. But do you know what the synthesis process is? Now let's talk about it.
Potassium chloride dissolves into saturated solution in the salt bath. Potassium carbonate, caustic potassium and barium chloride are added to remove impurities such as calcium, magnesium and sulfate at 90 C. Potassium hydroxide, chlorine gas and hydrogen are obtained by electrolysis of refined potassium chloride solution containing 280-315g/L of potassium chloride after precipitation, hydrochloric acid neutralization and preheating to 70-75 C. The concentration of the product obtained by diaphragm method is 10%-11%. The solution containing 45%-50% of the product is prepared by evaporation, concentration and cooling clarification. It can also be concentrated in the boiling pot and decolorized to produce solid products or flake products. The reaction formulas are as follows:
The preparation of electrolyte for mercury electrolysis is the same as that for diaphragm electrolysis. In the electrolysis chamber, graphite (or metal) is used as anode, mercury is used as cathode, chlorine gas from electrolysis is is sent to the chlorine gas drying process, and potassium amalgam is produced in the mercury chamber. Most unreacted potassium chloride is treated in dilute brine and returned to the raw material dissolution process. Because the concentration of mercury solution chamber is 45%-50%, it can be used as a liquid product, or can be steamed and concentrated to solid alkali or made into flake products by boiling soda pot. The reaction formulas of electrolysis and potassium amalgamation for mercury dissolution are as follows:
The above is a summary of the synthesis process of potassium hydroxide, I believe that everyone has already understood, in addition to strong alkalinity and corrosiveness. Absorbing carbon dioxide to form potassium carbonate. The pH of 0.1 mol/L solution is 13.5. White oblique crystal, industrial products for white or light gray block or bar. It is soluble in water, ethanol and ether.
If you have the demand for potassium hydroxide products, you can click on our website to consult: http://www.jinhao360.com.