Cangzhou, Hebei - In April 2015 a TDI (toluene diisocyanate) waste residue recycling project jointly developed by Cangzhou Fengyuan Environmental Science and Technology and Chongqing University passed the inspection by experts.
According to Fengyuan's website, traditional processing methods incinerate TDI waste residue - mostly polyisocyanates, taking up 2% to 8% of a facility's TDI capacity - and generate a large amount of hazardous gas.
The project uses such waste residue to produce TDA (Toluenediamine) monomer through catalyzed hydrolysis. It is able to process 15kT/year TDI waste residue, and reduce over 22kT/year carbon dioxide emission and 7kT/year nitrogen oxides emission.
Research for the project started in 2008 and the technology has acquired patent of invention in both China and the US. The project not only reduces environmental pollution but taps into the TDA market currently under-supplied in China, said the website.
Fengyuan is located at the Coastal-Port Economic and Technological Development Zone of Cangzhou, Hebei province and the project works with Dahua, one of China's largest TDI and fertiliser maker also based in Cangzhou with facilities in the same park.
Fengyuan was set up in 2008 with RMB28m ($4.5m) registered capital and a total area of 100,000 m². It currently employs 220 staff and has also been working with another of China's major TDI makers Bluestar's facilities in Taiyuan, Shanxi province.
XE Currency Conversion: 9 June, 2015