PVC: The difference between calcium carbide method PVC and ethylene method PVC

PVC的生产工艺有多种，根据单体氯乙烯的不同，生产工艺主要分为电石法和乙烯法两种。

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.

一、introduction about calcium carbide method PVC and ethylene method PVC.

电石法聚氯乙烯是一种煤化工路线。首先，由生石灰和碳基原料生产碳化钙，然后通过碳化钙和水的反应生产乙炔。加入乙炔和氯化氢形成氯乙烯，最后通过加成反应得到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.

电石法聚氯乙烯是一种煤化工路线。首先，由生石灰和碳基原料生产碳化钙，然后通过碳化钙和水的反应生产乙炔。加入乙炔和氯化氢形成氯乙烯，最后通过加成反应得到PVC。

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.

二、The difference between the two production processes of calcium carbide method PVC and ethylene method PVC.

1. 原料 In terms of raw material using make PVC

- 乙烯法 PVC 生产原料为乙烯、氯气等，乙烯法 PVC 生产的成本主要取决于原油价格。

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.

- 电石法 PVC 生产的原料为电石、氯化氢、电力等，生产电石的主要成本为电力成本，因此电石法 PVC 生产的成本主要取决于电价。

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. 价格 In terms of price

乙烯法因原料和工艺优势，价格一般高于电石法。

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.  应用领域 Application

电石法PVC树脂主要用于管材、建材，而乙烯法PVC树脂主要用于高档型材、透明片材、膜及汽车工业内装制品（如车顶内衬、地毯、车内蒙皮、绝缘管道、加油漏斗、车门饰条、波纹管、密封条、座椅、仪表板表皮等制品）。

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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