目前还在应用的氢氧化钾的方法主要有隔膜法、水银电解法、离子膜电解法，它的方法很多，一般评价一个工序的优劣，需要从成品质量、成本、设备成本等各方面综合考虑，我们今天就来讲一下水银电解法的工序。
At present, the methods of potassium hydroxide still used mainly include diaphragm method, mercury electrolysis method and ion-exchange membrane electrolysis method. There are many methods. Generally, the advantages and disadvantages of a process need to be comprehensively considered from the aspects of finished product quality, cost and equipment cost. Today, we will talk about the process of silver electrolysis method.
水银电解法电解液的配制和隔膜电解法相同。电解室中以石墨(或金属)作阳，水银作阴，电解生成的氯气送氯气干燥工序，生成的钾汞齐流入解汞室。还有大部分的氯化钾没有发生反应，再重新以淡盐水的状态经处理后，返回原料溶解工序。钾汞齐和清水发生反应生成氢氧化钾和氢气。因为从解汞室生出来的浓度为45%~50%，可当做液体产品进行使用，也可再经熬碱锅蒸浓成固碱或制成片状产品。

The electrolyte preparation of mercury electrolysis method is the same as that of diaphragm electrolysis method. In the electrolytic chamber, graphite (or metal) is used as the positive and mercury as the negative. The chlorine generated by electrolysis is sent to the chlorine drying process, and the generated potassium amalgam flows into the mercury dissolving chamber. Most of the potassium chloride did not react, and then returned to the raw material dissolution process after being treated in the state of light brine. Potassium amalgam reacts with clean water to produce potassium hydroxide and hydrogen. Because the concentration generated from the mercury dissolving chamber is 45% ~ 50%, it can be used as liquid products, and can also be evaporated into solid alkali or made into flake products through alkali boiling pot.
(1)氯化钾溶液的精制: 原材料氯化钾在化盐槽中进行溶化，并且添加碳化钾，氯化钡除去钙、镁和硫酸根等杂质，然后进入澄清槽，清液溢流而出，使用砂滤器过滤出轻微的悬浮物送入中和槽，加盐酸酸化流入精盐水储槽，经过盐水预热器用泵将精盐水打至盐水高位槽，之后流入水银电解槽。澄清槽底部的盐泥，然后过滤回收其中的盐水，泥排掉即可。
(1) Refining of potassium chloride solution: the raw material potassium chloride is dissolved in the salt tank, and potassium carbide is added. Barium chloride removes impurities such as calcium, magnesium and sulfate, and then enters the clarification tank. The clear liquid overflows. A slight suspension is filtered by a sand filter and sent to the neutralization tank, acidified with hydrochloric acid and flows into the refined brine storage tank, After passing through the brine preheater, pump the refined brine to the brine high-level tank, and then flow into the mercury electrolytic tank. Clarify the salt mud at the bottom of the tank, then filter and recover the brine, and then discharge the mud.
(2)电解: 水银电解槽分电解室和解泵室两部分。电解室中以石墨或金属作阳*，水银作阴*，通电后产生的氯气送氯气干燥工序，电解生成钾泵齐流入解泵室。大部分未反应的氯化钾以淡盐水状态经处理后：返回盐水工序。解泵室中，钾泵齐与端部清水反应生成氢氧化钾溶液流入电解液贮槽。解泵室产生的氢气送入到氢气输送站。
(2) Electrolysis: Mercury electrolytic cell is divided into electrolysis chamber and pump chamber. In the electrolysis chamber, graphite or metal is used as the positive * and mercury as the negative *. The chlorine generated after power on is sent to the chlorine drying process, and the electrolyzed potassium is pumped into the de pumping chamber. Most unreacted potassium chloride is treated in light brine and then returned to brine process. In the DEPUMPING chamber, the potassium pump reacts with the clean water at the end to generate potassium hydroxide solution, which flows into the electrolyte storage tank. The hydrogen generated in the de pumping room is sent to the hydrogen transmission station.
(3)固碱: 从水银电解槽解泵室出来的含KOH45-50%的碱液，经熬碱制成固碱或经制片机制片成产品。
(3) Solid alkali: alkali liquor containing koh45-50% from the pump chamber of mercury electrolytic cell is made into solid alkali by boiling alkali or into products by making machine-made tablets.
上面介绍的就是使用水银电解法的氢氧化钾的工序，一般可以用来弄成液碱和固碱，两种都可以进行使用。
The above is the process of potassium hydroxide by mercury electrolysis, which can generally be used to make liquid alkali and solid alkali, both of which can be used.