Cradle to Gate
Identity ID
17f5748a-4fbb-4d4e-bdbe-19c6b071bb82
Materials
Associated ID
664c3eab-fe66-4734-820d-2b8bdbfb92fd
Included activities starts
Included activities ends
Description
The main raw material for the glycolysis of waste PET flakes is clean PET flakes, with the primary auxiliary materials being ethylene glycol and sodium 5-sulfoisophthalate. Clean waste flakes are glycolyzed into BHET in the presence of ethylene glycol, while sodium 5-sulfoisophthalate is esterified to form a trifunctional monomer in the presence of ethylene glycol. Subsequently, the trifunctional monomer and BHET undergo polycondensation to produce recycled polyester.
The main wastewater discharges include floor cleaning water from the workshop and cooling water drainage from the circulation system, which are treated on-site before being discharged into the municipal sewerage system for further treatment. Exhaust gases are generated from flue gas of gas-fired boilers, glycol distillation column off-gas, alcoholysis filtration emissions, and fugitive emissions from various reaction units, which are treated and then indirectly released into the atmosphere. Waste materials mainly include filter residues, cleaning effluents, spent filter cartridges, waste chemical drums, waste packaging materials, wastewater treatment sludge, waste cleaning liquids, off-gas filter cartridges, and waste chemical drums, which are treated as hazardous waste and collected for disposal by qualified enterprises.
The primary raw material in this dataset is cleaned waste PET flakes, requiring integration with a cleaning process to complete the production flow.
Activity Description
This dataset represents the process of producing recycled polyester pellets from waste PET flakes through alcoholysis. It includes energy and auxiliary material consumption during the process, as well as emissions of waste, exhaust gases, and wastewater generated in the process.
Process Description
Production of recycled polyester pellets through alcoholysis treatment of clean PET flakes
Time period
2016
2026
Geography
China
Geography comment
Suqian, Jiangsu
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The processing technology in this dataset is alcoholysis, primarily involving clean waste bottle flakes being alcoholized into BHET using ethylene glycol, while sodium isophthalate-5-sulfonate undergoes esterification with ethylene glycol to generate a trifunctional monomer, followed by a polycondensation reaction between the trifunctional monomer and BHET to produce recycled polyester.