Teijin Frontier : New chemical recycling tech...
Teijin Frontier

New chemical recycling technology for PET fibers

(Source: Teijin)
(Source: Teijin)

A recycling technology using a new depolymerization catalyst to recycle colored polyester (PET) fibers without losing the quality of PET fibers made from petroleum-derived raw materials has been developed by Teijin Frontier. The new technology also lowers environmental load compared to conventional recycling.
The technology produces recycled materials equivalent to petroleum-derived PET raw materials. Using a new depolymerization catalyst for the conventional bis (2-hydroxyethyl) terephthalate (BHET) method, spent PET is chemically decomposed and purified back into BHET intermediate raw material before being repolymerized into PET. The production process is simpler than using dimethyl terephthalate (DMT) and ethylene glycol in a transesterification reaction, so recycling is achieved with less energy consumption. Also, the new technology reuses resources such as wastewater, waste liquid and depolymerization catalysts.
Teijin Frontier Co., Ltd., Tokyo/Japan, will launch a pilot facility at its Matsuyama/Japan plant in May 2022 and proceed with verification tests. It also will continue developing recycling technologies to improve the quality of recycled PET raw materials and reduce environmental load.

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