Main raw material consumption steps in the PVC production process
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Analysis of the main raw materials used in the synthesis of polyvinyl chloride (PVC) and the amount of each raw material consumed per unit volume
Share various PVC production processes and the raw materials used in each process
The raw materials consumed in the ethylene method are ethylene, caustic soda, and crude salt? The calcium carbide method uses calcium carbide, caustic soda, and crude salt? I don’t know what proportion each component accounts for in the cost
The raw materials required for the calcium carbide method include: calcium carbide (which produces acetylene), caustic soda, sodium hypochlorite or 98% concentrated sulfuric acid, hydrogen chloride, as well as some additives (initiators, dispersants, chain regulators, etc.)
General-purpose polyvinyl chloride resins can be classified into types 0 to 9; the higher the type number, the lower the degree of polymerization, and vice versa. The degree of polymerization of Type 1 resin is approximately 1700. Among them, type 5 resin has the widest range of applications; therefore, the raw materials used in the polymerization process of type 5 polyvinyl chloride resin are listed. These include vinyl chloride monomer (abbreviated as VCM), soft water (or deionized water, desalinated water), wall-coating liquid, additives (including buffers such as ammonium bicarbonate, dispersants such as polyvinyl alcohol, initiators such as EHP and CNP), terminators, defoamers, etc.
Analysis: In the synthesis of polyvinyl chloride (PVC), the main raw materials used and the amount of each material consumed are as follows: In the calcium carbide method, 1.4–1.5 tons of calcium carbide are required per ton of PVC, along with approximately 1.2 tons of raw salt； Ethylene method: The amount of ethylene consumed per ton of PVC ranges from 0.4 to 0.45 tons, while the amount of raw salt used is less than 1.2 tons ；