Potassium hydroxide is widely used in cosmetics, and its quality requirements are high. If there are many other ingredients inside, the expected effect may not be achieved when used. Even when used in cosmetics, it is harmful to the skin, so how should the content of impurities be determined when using it.
1. First, use a balance to weigh the accurate sample weight of 1.5-2.0g, then place it in a 250ml beaker and add distilled water to dissolve. After dissolution, put it into a volumetric flask of the same size, and stop adding water when the water is dissolved to 250ml.
2. Evenly pour the solution into three conical flasks and add two drops of phenolphthalein indicator. Then add hydrochloric acid solution dropwise until the solution changes from red to colorless. Then record the volume of hydrochloric acid used and add 2 drops of Methyl orange indicator. Similarly, titrate with hydrochloric acid Standard solution until the solution turns orange.
3. Then record the volume of hydrochloric acid solution added twice and calculate the impurity content of the product based on this.
At present, there are many potassium hydroxide manufacturers, so the competition between them is also very fierce. In addition to making concessions on price, we also need to improve the product quality. Because the product quality in the market is uneven, so if our product quality is very high, then consumers are more willing to buy products with better quality. Now let's learn how to increase the product quality together.
When concentrated into flakes of caustic soda, the heating process usually uses molten salt as the medium, and the molten salt needs to be burned in a hydrogen furnace to obtain a heat source. When the combustion furnace releases heat, it needs to be in a stable state to maintain a relative balance between the molten salt temperature and flow rate. It can only be heated in a relatively stable state. In general, the alkali temperature after plant selection needs to reach 380-400 ℃.
2. When heating, it is necessary to control the pressure and temperature of high-pressure steam. In general, a temperature range of 190-210 ℃ is more suitable.
During the heating process, it is necessary to keep the equipment in a sealed state. During high-pressure heating, avoid contact with air.
The key to increase the quality of potassium hydroxide was introduced. During the heating process, the pressure and temperature should be controlled, including no air leakage during the heating process. If you have any relevant product information, please come to our website http://www.ncbaviation.com Consult!