Cradle to Gate
Identity ID
297e51d7-b656-4db3-a4ff-472f6752a102
Materials
Associated ID
0d606830-07c4-4e6f-842a-7c4971c5b7ae
Included activities starts
Included activities ends
Description
Polyvinyl chloride (PVC) resin is widely used in industry, agriculture, construction, daily consumer products, packaging, and power sectors; the dataset includes major raw materials, auxiliary materials, energy consumption, atmospheric emissions, and waste generated during the production process, but infrastructure such as production equipment manufacturing and factory construction are excluded from the system boundaries of the dataset; the life cycle inventory is compiled from multiple data sources; polyvinyl chloride (PVC) is produced via the calcium carbide acetylene method and suspension polymerization, with production activities covering the acetylene section, vinyl chloride section, and polyvinyl chloride section. The specific process flows include calcium carbide crushing, acetylene generation, vinyl chloride synthesis, compression and rectification, PVC polymerization, and PVC slurry stripping. Extraction, PVC dewatering, drying, and packaging.
Activity Description
Polyvinyl chloride (PVC) is produced via the calcium carbide-acetylene method and suspended polymerization. Production activities include the acetylene section, vinyl chloride section, sulfuric acid purification, and polyvinyl chloride section. The specific process flow includes calcium carbide crushing, acetylene generation, vinyl chloride synthesis, compression and distillation, PVC polymerization, PVC slurry stripping, PVC dehydration, and drying and packaging.
Process Description
Polyvinyl chloride (PVC) resin is a plastic material with good chemical stability, resistance to corrosion from acids, alkalis, and salts, self-extinguishing flame retardancy, and excellent electrical insulation. It is suitable for environments below 70°C and can be processed using methods such as injection molding and extrusion. However, its heat resistance and weatherability are relatively poor; in particular, it tends to age under prolonged exposure to light. Therefore, aging inhibitors must be added to enhance its performance.
Time period
2017
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The calcium carbide acetylene process primarily involves generating acetylene gas by reacting calcium carbide with water. The acetylene gas is then mixed with hydrogen chloride and, in a converter, undergoes catalytic reaction at temperatures of 100--190 °C to produce vinyl chloride. After purification, the vinyl chloride enters a polymerization reactor, where initiators, dispersion agents and other additives are added to initiate polymerization at 48--62 °C to produce polyvinyl chloride (PVC). The product is further processed through centrifugal separation, drying, sieving and packaging to obtain finished PVC resin.