Cradle to Gate
Identity ID
9c815e8e-e654-4be0-b08d-3bf502c75191
Materials
Associated ID
8b8c60d1-e4b7-4c5a-b9df-f46e88809856
Included activities starts
Included activities ends
Description
Polypropylene (PP) resin is one of the five major general-purpose thermoplastic synthetic resins and can be used in electronics, automotive, construction materials, medical devices, and packaging; crude propylene is a by-product of this production activity, and the input-output inventory has been allocated based on the mass allocation method; the dataset includes major raw and auxiliary materials, energy consumption, emissions to air, and waste generated during the production process, but does not include infrastructure such as production equipment manufacturing and facility construction within the system boundary; the inventory data are compiled from multiple data sources; the production process of SPG-HT continuous polypropylene technology includes propylene purification (light ends removal, desulfurization, dehydration, arsine removal) and pre-polymerization polymerization, gas-solid separation, propylene recovery, steaming, drying, and other processes.
Activity Description
Using the SPG-HT continuous polypropylene process, which combines slurry polymerization and horizontal reactor gas-phase polymerization, the production process includes propylene purification (removal of light components, desulfurization, dehydration, and arsenic removal), pre-polymerization, polymerization reaction, gas-solid separation, propylene recovery, steaming, and drying.
Process Description
Polypropylene (PP) resin is one of the five major general-purpose thermoplastic synthetic resins. It appears as a white powder or granules and dissolves in solvents such as dimethylformamide or thiocyanates. Polypropylene is a non-toxic, odorless, tasteless, white, highly crystalline polymer and is currently one of the lightest varieties among all plastics. It can be used in fields such as electronics and electrical appliances, automotive, construction materials, medical devices, and packaging.
Time period
2020
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The SPG-HT continuous polypropylene process is adopted, with the reaction section consisting of liquid-phase pre-polymerization, liquid-phase bulk polymerization, and gas-phase polymerization. Liquid-phase pre-polymerization and liquid-phase bulk polymerization are both carried out in vertical reactors, while gas-phase polymerization takes place in a horizontal reactor; all reactors are equipped with stirrers. The powder post-treatment system employs a steaming and drying process, which efficiently removes hydrocarbons and oligomers from the powder, enabling the production of high-quality polypropylene products with low VOC content and low odor.