仍在使用的氢氧化钾的生产方法主要是隔膜法，汞电解法，离子膜电解法，其生产方法很多。 通常，对生产过程的质量进行评估，并要求成品质量，生产成本和设备成本。 考虑到所有方面，我们今天将讨论汞电解的生产过程。
The main production methods of potassium hydroxide still in use are diaphragm method, mercury electrolysis method and ion-exchange membrane electrolysis method. There are many production methods. Generally, the quality of the production process is evaluated, and the finished product quality, production cost and equipment cost are required. Considering all aspects, we will discuss the production process of mercury electrolysis today.
汞电解电解液的制备与隔膜电解的制备相同。 在电解室内，以石墨（或金属）为阳极，以汞为阴极，将电解产生的氯气送入氯气干燥工序，生成的钾汞齐流入汞冶炼室。 。 大部分氯化钾没有反应，在轻盐水状态下再次处理后，返回到原料溶解过程。 汞齐钾与清水反应形成氢氧化钾和氢。 由于从水银熔化室产生的浓度为45％?50％，因此可以将其用作液体产品，或者可以将其蒸发成固体基质，或者通过苛性钠锅制成片状产品。
The preparation of electrolyte for mercury electrolysis is the same as that of diaphragm electrolysis. In the electrolysis chamber, graphite (or metal) is used as anode and mercury is used as cathode to send the chlorine produced by electrolysis into the chlorine drying process, and the potassium amalgam produced flows into the mercury smelting chamber. Most of the potassium chloride did not react. After being treated again in light brine, it returned to the dissolution process of raw materials. Potassium amalgam reacts with water to form potassium hydroxide and hydrogen. Since the concentration generated from the mercury melting chamber is 45% - 50%, it can be used as a liquid product, or it can be evaporated into a solid matrix, or it can be made into a sheet product through a caustic soda pot.
(1) purification of potassium chloride solution:
将原料氯化钾溶解在盐浴中，加入碳酸钾，并去除氯化铯以除去钙，镁和硫酸盐等杂质，然后进入澄清池，上清液溢出，轻微悬浮。 用砂滤器过滤。 物料被送入中和罐，用盐酸酸化后流入盐水储罐，盐水通过盐水预热器泵入盐水高罐，然后流入汞电解罐。 澄清池底部的盐泥，然后过滤并回收盐水，然后排干泥浆。
Dissolve the raw material potassium chloride in the salt bath, add potassium carbonate, and remove cesium chloride to remove impurities such as calcium, magnesium and sulfate, and then enter the clarifier. The supernatant overflows and is slightly suspended. Filter with sand filter. The material is sent to the neutralization tank, acidified with hydrochloric acid, and then flows into the brine storage tank. The brine is pumped into the brine high tank through the brine preheater, and then flows into the mercury electrolytic tank. Clear the salt mud at the bottom of the tank, filter and recover the salt water, and then drain the mud.
汞电解池分为两部分，电解室和减压泵室。 在电解室中，石墨或金属用作阳极，汞用作阴极。 通电后产生的氯气被送到氯气干燥过程，电解钾泵流入泵室。 大部分未反应的氯化钾都在淡盐水状态下处理：将其返回盐水工艺。 在泵室中，钾泵与最终水反应形成氢氧化钾溶液，并流入电解液储罐。 在泵送室内产生的氢气被送至氢气输送站。
Mercury electrolysis cell is divided into two parts, electrolysis chamber and pressure reducing pump chamber. In the cell, graphite or metal is used as the anode and mercury as the cathode. The chlorine produced after power on is sent to the chlorine drying process, and the electrolytic potassium pump flows into the pump room. Most of the unreacted potassium chloride is treated in dilute brine: it is returned to the brine process. In the pump chamber, the potassium pump reacts with the final water to form a potassium hydroxide solution and flows into the electrolyte storage tank. The hydrogen generated in the pumping room is sent to the hydrogen transfer station.
(3) solid foundation:
The alkaline solution containing 45-50% KOH produced by the pumping chamber of the mercury electrolysis cell is made into solid alkali by ruthenium alkali or into product by tablet pressing mechanism.
The above describes the production method of potassium hydroxide by mercury electrolysis, usually producing liquid alkali and solid alkali, both of which can be used and sold.