国内生产氢氧化钾的副产品有两种工艺，一种是膜法(金属阳极法)，另一种是离子膜法，从整个氢氧化钾的生产到氢氧化钠的生产工艺基本相同(工艺流程相同)。区别只在于原辅料和操作控制的区别。
　　There are two by-products of domestic production of potassium hydroxide, one is membrane method (metal anode method) and the other is ion membrane method. The production process from the whole production of potassium hydroxide to the production of sodium hydroxide is basically the same (the process flow is the same). The difference only lies in the difference between raw and auxiliary materials and operation control.
　　(1)隔膜方法(阳极)金属电解沉积氢氧化钾流程简报如下:将精制后遇到的需要金属阳极电解槽中电解水注射氯化钾与直流电电解,生成氢氧化钾阴极室,通过蒸发器蒸发液体氢氧化钾产品,如继续浓缩、脱色、制作人,固体氢氧化钾的产品。方程如下:
　　(1) Diaphragm method (anode) metal electrolytic deposition potassium hydroxide process is as follows: inject the electrolytic water in the metal anode electrolyzer after refining into potassium chloride and electrolyze with direct current to generate the potassium hydroxide cathode chamber, and evaporate the liquid potassium hydroxide products through the evaporator, such as continuous concentration, decolorization, producer and solid potassium hydroxide products. The equation is as follows:
　　(2)离子膜法电解氢氧化钾的工艺流程。
　　(2) The technological process of potassium hydroxide electrolysis by ion-exchange membrane method.
　　使用氯化钾为原料,淡盐水流出离子膜电解槽后去除氯和脱氯塔在饱和盐水罐是由饱和盐水,然后添加氢氧化钾,碳酸钾和其他化学物质,盐水进入沉降器澄清,但是定居者的精制盐水和悬浮物,盐水精制的螯合树脂塔将产生不利影响,盐水悬浮物一般要求小于1ppm，所以需要通过盐水过滤器。然后经过二次精制，即将盐水放入螯合树脂塔中除去钙、镁，可以加入到离子膜电解槽的阳极电池中;同时，纯水和液态碱一起进入阴极腔。直流电进入阳极室后，产生氯气，排出新鲜卤水，卤水被分离器分离，氯气输送到主氯管。鲜卤水一般为kcl200-220g /l，槽内去氯、去饱和。电解槽的阴极室产生氢气和30-32%的液基，液基也通过分离器，氢气被输送到氢气和氧气总管。30-32%的液基可以作为商品出售，也可以送到蒸发器将液基蒸至48%作为商品出售，再浓缩成片剂和固体氢氧化钾产品。

　　Using potassium chloride as raw material, the dilute brine flows out of the ion-exchange membrane electrolyzer to remove chlorine and dechlorination tower. In the saturated brine tank, the saturated brine is used, and then potassium hydroxide, potassium carbonate and other chemicals are added. The brine enters the settler for clarification, but the refined brine and suspended solids of the settler will have adverse effects on the refined chelating resin tower of the brine. Generally, the suspended solids of the brine are required to be less than 1ppm, so it is necessary to To pass through the brine filter. After secondary refining, the brine is put into the chelating resin tower to remove calcium and magnesium, which can be added to the anode battery of the ion-exchange membrane electrolyzer; meanwhile, pure water and liquid alkali enter the cathode cavity together. After the direct current enters into the anode chamber, chlorine gas is generated, and fresh brine is discharged. The brine is separated by the separator, and the chlorine gas is delivered to the main chlorine pipe. The fresh brine is generally KCl 200-220g / L, which is de chlorinated and desaturated in the tank. The cathode chamber of the electrolytic cell produces hydrogen and 30-32% liquid base. The liquid base also passes through the separator, and hydrogen is delivered to the hydrogen and oxygen header. 30-32% of the liquid base can be sold as a commodity, or sent to the evaporator to evaporate the liquid base to 48% as a commodity, and then concentrated into tablets and solid potassium hydroxide products.
　　(3)由于生产工艺的不同，产品质量也有一定的差异，离子膜法生产的产品杂质相对比膜法少，质量好，成本略高，价格略高。表2和表3分别为离子膜法和膜法的产品质量标准。
　　(3) Due to the different production process, the product quality also has certain differences. The product impurities produced by the ion-exchange membrane method are relatively less than that produced by the membrane method, with good quality, slightly higher cost and slightly higher price. Table 2 and table 3 are the product quality standards of ion-exchange membrane method and membrane method respectively.