Manufacturing method of alkali sulfide
I. Introduction
Alkali sulfide is an important inorganic chemical, which is widely used in metallurgy, paper making, printing and dyeing, leather, ceramics and other industries. With the continuous development of science and technology, the manufacturing method of alkali sulfide is also being improved and optimized. This article will introduce a common manufacturing method of alkali sulfide.
2. Raw materials and equipment
1. Raw materials: sodium hydroxide, sulfur, water.
2. Equipment: reactor, stirrer, thermometer, condenser, filter and so on.
3. Manufacturing steps
1. Add sodium hydroxide and water into the reactor in a certain proportion and stir well.
2. Heat the reactor to a certain temperature to dissolve sodium hydroxide completely.
3. Slowly add sulfur while keeping stirring to fully react sulfur with sodium hydroxide solution.
4. Continue to heat and maintain stirring so that the reaction is complete.
5. Cool the reactor and filter out the unreacted impurities to obtain the alkali sulfide solution.
6. Concentrate, crystallize and dry the alkali sulfide solution to get the final alkali sulfide product.
4. Precautions
1. Control the reaction temperature and charging speed, avoid local overheating and uneven reaction.
2. Keep stirring to prevent material deposition and bonding.
3. Choose suitable filter material when filtration to avoid product loss and residue of filter residue.
4. Control temperature and humidity when drying to avoid product lumping and deterioration.
V. Conclusion
The manufacturing method of alkali sulfide involves several links and precautions, and requires strict control of reaction conditions and operation process to ensure product quality and production safety. Through the manufacturing method introduced in this paper, high-quality alkali sulfide products can be produced to meet the needs of different fields.
