Manufacturing method of high purity dimethyl carbonate
I. INTRODUCTION
High purity dimethyl carbonate is an important raw material for the production of chemicals, which is widely used in the fields of pharmaceuticals, pesticides, plastics, fuels and so on. With the continuous development of science and technology, the manufacturing method of high purity dimethyl carbonate has been optimized. In this paper, an efficient and environmentally friendly manufacturing method of high purity dimethyl carbonate will be introduced.
II. MATERIALS AND METHODS
1. MATERIALS
Methanol, carbon dioxide, catalysts (e.g., sulfuric acid, sodium methanol, etc.), dehydrating agents (e.g., molecular sieves, silica gel, etc.), refined solvents (e.g., ethanol, acetone, etc.).
2. Equipment
Reactor, distillation column, storage tank, pump, valve, etc.
3. Manufacturing method
(1) Methanol and carbon dioxide reaction
Mix methanol and carbon dioxide according to a certain proportion, pass into the reactor, and under the action of catalyst, carry out esterification reaction to generate dimethyl carbonate. Temperature, pressure and other parameters need to be controlled during the reaction to ensure the smooth progress of the reaction.
(2) Dehydration treatment
After the reaction is finished, the reaction solution is dehydrated to remove the water in it. Dehydrating agents such as molecular sieve and silica gel can be used for dehydration to ensure the purity of the product.
(3) Distillation and purification
The dehydrated dimethyl carbonate is subjected to distillation and purification to obtain a high purity product. During the distillation process, parameters such as tower kettle temperature and reflux ratio need to be controlled to ensure the quality and yield of the product.
(4) Quality testing and packaging
The purified high purity dimethyl carbonate is subjected to quality testing, including purity, moisture, acidity and other indicators. After passing the test, it was packed and stored in storage.
III. RESULTS AND DISCUSSION
1. RESULTS
The purity of the high purity dimethyl carbonate manufactured by this method can reach more than 99.9%, and the indexes of moisture, acidity and so on meet the national standard. The yield of the product is high and the production cost is low.
2. Discussion
During the manufacturing process, the parameters of each link need to be strictly controlled to ensure the quality and yield of the product. At the same time, attention needs to be paid to safe production to prevent accidents. In addition, attention needs to be paid to the treatment of waste gas, and environmental protection measures should be taken to treat it in order to reduce the impact on the environment.
IV.CONCLUSION
This method is an efficient and environmentally friendly method for the manufacture of high purity dimethyl carbonate with high product quality and yield. In the actual production, the process parameters can be adjusted and optimized according to the specific conditions to further improve the production efficiency and reduce the cost. At the same time, it is necessary to strengthen the safety production management and environmental protection governance to ensure the smooth progress of the production process and minimize the impact on the environment.
