PVC: The difference between calcium carbide method PVC and ethylene method PVC
There are many production processes of PVC. According to the different monomer vinyl chloride, the production processes are mainly divided into calcium carbide method and ethylene method.
introduction about calcium carbide method PVC and ethylene method PVC.
PVC by calcium carbide method is a coal chemical route. First, calcium carbide is produced from quicklime and carbon-based raw materials, and then acetylene is produced by the reaction of calcium carbide and water. Acetylene and hydrogen chloride are added to form vinyl chloride, and finally PVC is obtained by the addition reaction.
Ethylene method PVC is a petrochemical route, which uses chemical light oil, light diesel oil and other main raw materials to produce PVC through a series of reactions and additions.
The difference between the two production processes of calcium carbide method PVC and ethylene method PVC.
1. In terms of raw material using make PVC
The raw materials for PVC production by ethylene method are ethylene, chlorine, etc. The cost of PVC production by ethylene method mainly depends on the crude oil price.
The raw materials of PVC production by calcium carbide method are calcium carbide, hydrogen chloride, electricity, etc. The main cost of producing calcium carbide is electricity. Therefore, the cost of PVC production by calcium carbide method mainly depends on the electricity price.
2. In terms of price
Due to the advantages of raw materials and process, the price of PVC ethylene process is generally higher than that of PVC calcium carbide process.
3. Application
The calcium carbide method PVC resin is mainly used for pipes and building materials, while the ethylene method PVC resin is mainly used for high-grade profiles, transparent sheets, films and automotive industry interior decoration products (such as roof lining, carpets, car interior covering, insulating pipes, fuel filler, door trim, corrugated pipes, sealing strips, seats, instrument panel skins and other products).
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