Cellulose Acetate Production

1. Cellulose Acetate Production Insights
1. ** Selection of Raw Materials **: Cellulose acetate production, the first heavy cellulose raw materials are carefully selected. High-quality cellulose, with long fibers and high degree of polymerization, can lay a good quality foundation for the product. Such as cotton lint, which has high cellulose content and few impurities. After pretreatment, after removing impurities such as grease and wax, it can be put into production, which can significantly improve the purity and performance of cellulose acetate.
2. ** Acetylation Reaction **: Acetylation is a key link. Using sulfuric acid as a catalyst, acetic anhydride and cellulose The temperature should be controlled within a certain range. If it is too low, the reaction will be slow. If it is too high, it is easy to cause side reactions, which will affect the structure and properties of the product. The pressure also needs to be precisely regulated to ensure that the reaction is carried out fully and efficiently. During the reaction process, the reaction process should be closely monitored. By analyzing the composition of the reaction solution, the reaction conditions should be adjusted in a timely manner to obtain the product with the ideal degree of acetation.
3. ** Post-treatment process **: After the acetation reaction is completed, the product needs to undergo a series of post-treatment. It includes hydrolysis to adjust the degree of acetation of cellulose acetate and remove the residual catalyst and unreacted raw materials. The washing process cannot be ignored. It is washed many times with a suitable solvent to remove Then dry, control the drying temperature and time to avoid excessive drying and embrittlement of the product, or insufficient drying and excessive moisture affecting the performance.
4. ** Quality Control **: Establish a strict quality inspection system. From raw materials entering the factory to products leaving the factory, testing points are set up in all links. Testing items cover cellulose acetate viscosity, degree of acetation, moisture content, ash, etc. Using advanced testing instruments, such as viscometer to measure viscosity, chemical analysis method to measure degree of acetation, to ensure product quality is stable, in line with standards, to meet the needs of different application fields.