Potassium hydroxide is an important product in the basic chemical industry, which is mainly used as raw material for the production of potassium salt and potash. It is also widely used in medicine, light industry, electrochemistry, textile and other fields. How to understand potassium hydroxide from its preparation? Now let's learn about it.
Potassium hydroxide is a typical strong alkali, which is used in many industries. It is an important product in the basic chemical industry. Most of its applications are due to the reaction of potassium hydroxide with acid and the corrosiveness of potassium hydroxide itself. Does potassium hydroxide exist in nature?
In fact, potassium hydroxide does not exist alone in nature. Different raw materials need to be prepared by chemical reaction. According to the concentration of products and raw materials, the preparation methods are also different. At present, manufacturers mainly use solution electrolysis and ion-exchange membrane electrolysis. The concentration of products prepared by the two methods is different through various processes.
Potassium hydroxide can be prepared by electrolysis of high-purity potassium chloride aqueous solution. The electrolyzer used is similar to sodium hydroxide in form and process. When using diaphragm electrolyzer, the electrolyte obtained contains 10% - 15% mass potassium hydroxide and about 10% mass potassium chloride. After evaporation, concentration and cooling, most of the potassium chloride crystallizes out, and the product containing 45% - 50% potassium hydroxide (containing 06% potassium chloride) is obtained after separation.
High purity potassium hydroxide can be prepared by mercury electrolysis. However, the content of heavy metal impurities in potassium chloride aqueous solution should be controlled below 01ppm to avoid excessive hydrogen content in chlorine. Ion exchange membrane electrolysis uses a special ion exchange membrane. Potassium hydroxide is more difficult to dehydrate than sodium hydroxide. The purity of industrial solid potassium hydroxide is 88%~92%, and there are two kinds of solids: massive and flaky. Liquid potassium hydroxide has two concentration specifications: 45% and 50%.
The above is the summary of the preparation of potassium hydroxide for you. I believe you have further study. I hope you can choose a suitable method during production. If you want more information, please continue to pay attention to us http://www.jinhao360.com OK.