When producing potassium hydroxide, we need to consider its production process. Different treatment methods may have different effects in daily use. Therefore, due to the difference of production process, not all products have the same quality, so it is inevitable to have differences, but no matter which process, We must grasp the specific methods correctly.

(1)隔膜法(金屬陽極)電解制取氫氧化鉀工藝流程簡敘如下：將精制后符合電解需要的水溶液氯化鉀不斷地注入金屬陽極電解槽中，通以直流電進行電解，生成陰極室流出，通過蒸發器蒸發濃縮得到液體產品，如繼續濃縮、經脫色、制片，得固體產品。其反應式如下：

(1) The process flow of electrolytic preparation of potassium hydroxide by diaphragm method (metal anode) is briefly described as follows: the refined aqueous solution potassium chloride that meets the needs of electrolysis is continuously injected into the metal anode electrolytic cell, electrolyzed with direct current to generate the outflow from the cathode chamber, evaporated and concentrated through the evaporator to obtain liquid products, such as continuous concentration, decolorization and production to obtain solid products. The reaction formula is as follows:

(2)離子膜法電解制取的工藝流程

(2) Technological process of ion-exchange membrane electrolysis

用氯化鉀為原料，從離子膜電解槽流出的淡鹽水經過脫氯塔脫去氯氣，進入鹽水飽和槽制成飽和鹽水，而后再加入氫氧化鉀、碳酸鉀等化學品，鹽水進入澄清澄清，但是從澄清槽出來的一次精制鹽水還有一些是懸浮物，對鹽水精制的螯合樹脂塔將產生不良影響，-般要求鹽水中的懸浮物小于1PPm，因此需要經過鹽水過濾器過濾。

Using potassium chloride as raw material, the light brine from the ion-exchange membrane electrolyzer will be dechlorinated through the dechlorination tower and enter the brine saturation tank to make saturated brine, and then add potassium hydroxide, potassium carbonate and other chemicals. The brine will enter the clarification. However, some of the primary refined brine from the clarification tank are suspended solids, which will have an adverse impact on the chelating resin tower of brine refining, -Generally, the suspended solids in brine are required to be less than 1ppm, so they need to be filtered through brine filter.

而后經過二次精制，即鹽水進入螯合樹脂塔除去其中的鈣、鎂，就可以加到離子膜電解槽的陽極室;與此同時，純水和液堿一同進到陰極室。通入直流電后，在陽極室產生氯氣和流出淡鹽水經分離器分離，氯氣輸送到氯氣總管,淡鹽水一般含KCl200-220g/l，經脫氯氣去飽和槽。在電解槽的陰極室產生氫氣和30-32%液堿同樣也經過分離器，氫氣輸送到氫氧總管。30-32%的液堿可以作為商品出售，也可以送到蒸發裝置蒸濃到48%的液堿，作商品出售,再濃縮即可制成片、固體氫氧化鉀產品。

Then, after secondary refining, that is, the brine enters the chelating resin tower to remove calcium and magnesium, which can be added to the anode chamber of the ion-exchange membrane electrolyzer; At the same time, pure water and liquid alkali enter the cathode chamber together. After direct current is applied, chlorine gas is generated in the anode chamber and the outgoing light brine is separated by the separator, and the chlorine gas is transmitted to the chlorine main pipe. The light brine generally contains kcl200-220g / L, which is desaturated by dechlorination gas. Hydrogen and 30-32% liquid alkali generated in the cathode chamber of the electrolytic cell also pass through the separator, and the hydrogen is transmitted to the hydrogen and oxygen main pipe. 30-32% of liquid alkali can be sold as commodities, or it can be sent to the evaporation device to evaporate 48% of liquid alkali for commodity sale, and then concentrated to make tablets and solid potassium hydroxide products.

(3)由于生產工藝差別，產品質量也有一定差異，離子膜法產出的產品較隔膜法產品雜質相對少、品質高，成本價稍高，售價略高。(3) Due to different production processes, there are also some differences in product quality. The products produced by ion-exchange membrane method have relatively less impurities, high quality, slightly higher cost price and slightly higher price than those produced by diaphragm method.

氫氧化鉀一般是采用兩種工藝流程，一種是隔膜法(金屬陽極)，二是離子膜法，而這兩種流程方法，雖然說工藝基本相同，但是有些細節上卻大不相同，因此，為了能夠準確的分辨出他們之間的區別，那么我們就需要正確的掌握其工藝的具體方法，才能確定其質量的差異。

Potassium hydroxide generally adopts two processes, one is diaphragm process (metal anode) and the other is ion-exchange membrane process. Although the processes of these two processes are basically the same, some details are very different. Therefore, in order to accurately distinguish the differences between them, we need to correctly grasp the specific methods of their processes, To determine the difference in quality.