Method of making cellulose acetate tablets
To make cellulose acetate tablets, the first thing to do is to prepare materials. Take an appropriate amount of cellulose, which is the base material for the production of tablets. The quality of the quality depends on the quality of the finished product. It is also necessary to prepare acetic anhydride, which is a reagent that plays a key reaction with cellulose. Another catalyst, such as sulfuric acid, is required to promote the speed of the reaction.

First put the cellulose into an appropriate amount of solvent to make it fully swell. The choice of solvent is very important, and it must be able to effectively swell the cellulose without damaging its chemical structure. When swelling, the temperature and duration should be controlled. Generally, the temperature should be moderate. The duration depends on the characteristics of the cellulose, so that the cell

After the cellulose has swollen, slowly add acetic anhydride and add the catalyst dropwise. The addition of time should be slow and stirred continuously to make the reaction uniform. During the reaction process, temperature control is crucial. If the temperature is too high, the reaction will be too fast, which is easy to cause more side reactions; if the temperature is too low, the reaction will be slow and take a long time. Usually maintain a specific temperature range and pay close attention to changes in the reaction.

After the reaction is completed, the resulting mixture will be treated. First, the solid product will be separated by precipitation or filtration. During precipitation, a specific precipitant can be added to promote the precipitation of the product. Filtration requires filter paper or filter screen with suitable pore size to ensure effective product separation.

The separated product still contains impurities and needs to be washed. Wash multiple times with an appropriate solvent to remove residual reagents and by-products. The washed product is dried to obtain relatively pure cellulose acetate.

Then, the dried cellulose acetate is formed. It can be hot pressed, placed in a mold, and pressed into the desired sheet at a certain temperature and pressure. The temperature and pressure of hot pressing must be precisely controlled to obtain the ideal sheet thickness, flatness and mechanical properties. After the pressing is completed, the sheet is cooled to obtain a cellulose acetate sheet. The whole process requires fine control of each step to obtain high-quality cellulose acetate sheets.