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[Chemical Knowledge]：What is ethylene? A deeper look at this chemical

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As an important chemical, ethylene is widely used in plastics, fibers, rubber, dyes, fertilizers and other fields. So, what exactly is ethylene? What are its properties and applications? This article will introduce them one by one.

1. the nature of ethylene

ethylene (C2H4) is a colorless, pungent odor gas. It can be mixed with air and burned when heated or ignited to produce carbon dioxide and water. Ethylene is a liquid at 5.0°C, has a density of 0.565g/cm3, a boiling point of -103.7°C, and a flash point of 498°C. Ethylene can be used to produce organic substances such as ethanol and ethylene acid.

2. Ethylene Application

1. Plastic

Ethylene is widely used in the manufacture of various plastics. It can be produced by cracking fossil fuels such as oil and natural gas. The manufacturing process of ethylene is relatively simple and the cost is relatively low. At present, polyethylene, polyvinyl chloride, polypropylene, etc. are all plastics made of ethylene.

2. fiber

ethylene can be made into fiber, made of ethylene fiber is elastic, with soft and comfortable, wear-resistant, anti-wrinkle, easy to wash and other characteristics, is widely used in the production of socks, gloves, sportswear and so on.

3. Rubber

Ethylene also plays an important role in the manufacture of rubber. Ethylene is a kind of raw material for polymerization chemical reaction, which can be polymerized with other units into nitrile rubber, ethylene propylene rubber and other rubbers, and is widely used.

4. Dye

Ethylene can also be used in the manufacture of dyes. For example, black ink is made of ethylene as the main raw material and then through a series of reactions.

5. Fertilizer

Ethylene can also be used to synthesize fertilizers. For example, a key reaction in the synthesis of ammonia requires the use of ethylene.

3. Ethylene Production Process The production of

ethylene generally uses petroleum, natural gas, etc. as a feedstock. The most commonly used method of ethylene production is by catalytic cracking of high molecular compounds at high temperatures. Specifically, through the polymer decomposition reaction, the polymer is decomposed into oligomers, and then the oligomers are condensed into ethylene through the top of the column. The production process of ethylene is more complex, and it is necessary to produce high-purity ethylene through multiple reactions, separation, purification and other processes.

4. the environmental protection problems of ethylene

ethylene is widely used in industry and life, but it also has some environmental problems. For example, the manufacturing process of ethylene consumes a lot of energy and also produces a large amount of carbon dioxide emissions, which puts a certain pressure on the environment. After the application of ethylene, the disposal of its waste is also a more complex problem. Ethylene

is an important organic chemical, which is widely used in plastics, fibers, rubber, dyes, fertilizers and other fields. For the nature of ethylene, production process, application and environmental issues, we need to conduct in-depth understanding and discussion, in order to better deal with the development of the chemical industry and related problems and challenges.