Ethylene carbonate

Product Details

CasNo： 96-49-1

MF： C3H4O3

Appearance： liquid

Delivery Time： 15 days

Packing： 1BC/drum

Purity： 99.5%

1. Basic Information

• Chemical Formula: C?H?O?

• Molecular Weight: 88.06 g/mol

• CAS Number: 96 - 49 - 1

• EINECS Number: 202 - 510 - 0

• Synonyms: 1,3 - Dioxolan - 2 - one; Glycol Carbonate; Ethylene Glycol Carbonate

• Appearance: At room temperature (25 °C), it is a transparent, colorless, and odorless crystalline solid. When the temperature is higher than 35 °C, it turns into a transparent, colorless liquid.

2. Physical Properties

• Melting Point: 35 - 38 °C

• Boiling Point: 248 °C at 760 mmHg

• Density: 1.3218 g/cm³

• Refractive Index: 1.4158 (at 50 °C)

• Viscosity: 1.90 mPa·s (at 40 °C)

• Solubility: Slightly soluble in water. It is soluble in organic solvents such as alcohols, ethers, and ketones. It can form a 40% miscible mixture with water, alcohol, ethyl acetate, benzene, and chloroform. It is also soluble in n - butanol and carbon tetrachloride, but insoluble in gasoline and turpentine oil.

• Flash Point: 160 °C

3. Chemical Properties

• Stability: Under normal storage conditions, ethylene carbonate is relatively stable. However, it is incompatible with strong oxidizing agents, acids, bases, and reducing agents.

• Hydrolysis: The dry ester of ethylene carbonate is slowly decomposed at 200 - 250 °C. In the presence of alkalies, it hydrolyzes rapidly above 125 °C, while in the presence of strong acids, the hydrolysis is relatively slower. Pure ethylene carbonate remains stable in the presence of water at 100 °C. Salts like sodium chloride can accelerate the hydrolysis process.

• Reactions with Other Compounds: It can react with phenols, carboxylic acids, and amines to form β - hydroxyethyl ethers, β - hydroxyethyl esters, and β - hydroxyethyl carbamates respectively.

4. Preparation Methods

• Phosgene Method: This was one of the earliest industrial methods for preparing ethylene carbonate. It involves the direct reaction of ethylene glycol with phosgene. However, due to the high toxicity of phosgene and its severe environmental pollution, this method has been banned in developed countries. But in some less - developed regions, there are still enterprises using this method for production.

• Transesterification Method: Ethylene carbonate can be prepared by the transesterification reaction between diethyl carbonate and ethylene glycol. The reaction system mainly includes homogeneous and heterogeneous catalytic systems.

• Addition Reaction Method: Ethylene oxide and carbon dioxide react under the action of a suitable catalyst to produce ethylene carbonate. Low - temperature and high - pressure conditions are favorable for this reaction, and the selection of an appropriate catalyst is crucial.

5. Product Specifications

• Battery - Grade:
  • Appearance: Crystalline solid at room temperature, free of mechanical impurities.
  • Purity: ≥ 99.99%
  • Moisture Content: ≤ 0.005%
  • Ethylene Oxide Content: ≤ 0.01%
  • Ethylene Glycol Content: ≤ 0.01%
  • Color (Al - Co): ≤ 10

• Industrial - Grade:
  • Appearance: Crystalline solid at room temperature, free of mechanical impurities.
  • Purity: ≥ 99.7%
  • Moisture Content: ≤ 0.05%
  • Ethylene Oxide Content: ≤ 0.01%
  • Ethylene Glycol Content: ≤ 0.01%
  • Color (Al - Co): ≤ 10

6. Application Areas

• Lithium - Ion Battery Field: It is an excellent organic solvent for lithium - ion battery electrolytes. In new - energy lithium - ion power batteries, ethylene carbonate can improve the performance of the electrolyte, which is beneficial to enhancing the overall performance of lithium - ion batteries.

• Organic Synthesis Field: As an important organic intermediate, it can replace ethylene oxide in dioxygenation reactions. It is also the main raw material for the production of dimethyl carbonate by the transesterification method. In addition, it is used in the synthesis of drugs such as furazolidone.

• Other Fields: It can be used as a spinning solution in the textile industry and as a fiber finishing agent. It can also be directly used as a solvent for removing acidic gases and as an additive for concrete. In addition, it can be used as a plastic foaming agent and a stabilizer for synthetic lubricants.

7. Packaging and Storage

• Packaging: Usually packaged in stainless - steel drums or galvanized iron drums, with a net weight of 250 kg per drum. It can also be packaged in IBC (Intermediate Bulk Container) or ISO TANK according to customer requirements.

• Storage: Should be stored in a cool, well - ventilated, and dry place. It is stored and transported in accordance with general chemical regulations. Avoid exposure to high temperatures, open flames, and direct sunlight. Keep away from oxidizing agents, acids, and bases during storage to prevent chemical reactions.