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[Chemical Knowledge]：Production method and process flow of high-purity diethyl carbonate (DEC)

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Manufacturing Method
of High-purity Diethyl Carbonate (DEC)
Diethyl Carbonate (DEC) is an important organic chemical raw material, which is widely used in medicine, pesticide, plastic, spice and other fields. Among them, high-purity diethyl carbonate is an essential raw material for many high-end applications. This article will introduce a high purity diethyl carbonate manufacturing method.

1. raw materials and equipment

1. raw materials: ethanol, carbon dioxide, catalyst (such as sulfuric acid, phosphoric acid, etc.), dehydrating agent (such as anhydrous magnesium sulfate, etc.).
2. Equipment: reactor, condenser, fractionator, storage tank, pump, valve, etc.

2. Process

1. Add ethanol and catalyst to the reactor, stir and heat to a certain temperature.
2. Carbon dioxide gas is introduced to control the reaction temperature and pressure, so that ethanol and carbon dioxide are esterified under the action of a catalyst to generate diethyl carbonate.
3. After completion of the reaction, the reaction solution is distilled to separate unreacted ethanol and water.
4. The diethyl carbonate after distillation is dried by adding a dehydrating agent to remove residual moisture.
5. The dried diethyl carbonate is subjected to rectification to obtain a high-purity diethyl carbonate product.

3. operation points

1. control the reaction temperature and pressure, to avoid the occurrence of side reactions.
2. During the distillation process, the distillation temperature and vacuum degree should be controlled to ensure the purity of the product.
3. The appropriate dehydrating agent should be selected during the drying process, and the drying time and temperature should be controlled.
4. In the process of distillation, the operating parameters should be adjusted according to the product purity requirements.

4. safety and environmental protection measures

1. Strictly abide by the safety operation procedures during operation to ensure the safety of employees and equipment.
2. Waste and wastewater shall be properly treated to avoid environmental pollution.
3. Strengthen equipment maintenance and maintenance to reduce the occurrence of failures and leakage accidents.

5. Quality Control

1. Quality inspection of raw materials to ensure that the quality of raw materials meet the requirements.
2. Real-time monitoring of the production process to find and solve problems in time.
3. Conduct quality inspection on the product to ensure that the purity of the product meets the requirements.

6. income analysis

manufacturing high purity diethyl carbonate income mainly depends on the purity of the product, yield and sales price. In general, the high-purity diethyl carbonate has a high selling price, and thus can bring about a high profit. At the same time, increasing production can also reduce the cost per unit of product and increase revenue.

7. market prospects

high-purity diethyl carbonate as an important organic chemical raw material, has a wide range of applications in the fields of medicine, pesticides, plastics, spices and so on. With the continuous development of science and technology, the application field of high-purity diethyl carbonate will continue to expand. Therefore, the market prospect of high purity diethyl carbonate is very broad.

In short, the manufacturing method of high-purity diethyl carbonate needs to control the reaction conditions, operating procedures and product quality, while strengthening safety and environmental management and quality control, in order to obtain high-quality products, and achieve better economic and social benefits.

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