KOH, alias caustic potash, caustic alkali, potash ash. Appearance.

This product is a white powder with strong hygroscopicity. It is prone to deliquesce when exposed to the air and absorbs carbon dioxide to generate potassium carbonate.

Potassium hydroxide by-product processes include:

1. Diaphragm method: Melt potassium chloride into a saturated solution in a chemical salt tank, heat it to 90°C, then add potassium carbonate, potassium hydroxide, barium chloride, etc. to remove impurities, and then steam the potassium chloride solution to 70 ~75℃, then slag removal, medium salt, refining, preheating temperature is 70~75℃, and then make potassium hydroxide, chlorine and hydrogen. The concentration of potassium hydroxide prepared by this method is 10%~11%. In order to obtain a high-concentration solution, it needs to be evaporated and concentrated and cooled to clarify.

2. Ion-exchange membrane method: using potassium chloride as the raw material, flowing out of the ion-exchange membrane electrolyzer, dechlorinating through the dechlorination tower, entering the saturation tank, adding potassium hydroxide, potassium carbonate and other chemical substances, and entering the clarification tank for clarification. There is suspended solids out of the clarification tank, which needs to be filtered, and then re-purified, through the cathode chamber to pass through, and the chlorine gas is generated in the anode chamber, which flows out from the clarification tank, and then passes through the distiller, and then passes through the distiller, from the distiller to the chlorine main From the distiller to the distillate, the liquid caustic at 30~30℃ is also sent to the distillation tube from the distiller.