Nan Ya Plastics Corporation

Cheng-Hsun Chen

Te-Chao Liao

Jung-Jen Chuang

Chung-Yu Chen

Zhang-Jian Huang

Chia-Ruey Tsai

Yu-Ti Tseng

A method for improving a recovery rate of recycled bis(2-hydroxyethyl) terephthalate (BHET) is provided, which includes: providing a recycled polyester fabric; using a chemical de-polymerization liquid to chemically depolymerize the recycled polyester fabric, so as to form a de-polymerization product containing BHET; dissolving the BHET in water to form a aqueous phase liquid; cooling the aqueous phase liquid from a dissolution temperature to a first crystallization temperature, so as to crystallize at least a part of the BHET; and cooling the aqueous phase liquid from the first crystallization temperature to a second crystallization temperature, so as to crystallize at least another part of the BHET.

Method for improving recovery rate of recycled bis(2-hydroxyethyl) terephthalate

A method for crystallizing succinic acid includes agitating a succinic acid reaction solution with a jet-flow agitator that is rotated at low speed and has a low volume power density; compared with the conventional agitators, the jet-flow agitator helps increase the uniformity of succinic acid particles, shorten the time required for crystallizing succinic acid, and raise the yield of the crystallized succinic acid as well as purity of crystallized succinic acid having a purity of 99.8-99.9%.

Method for enhancing uniformity of crystallized succinic acid and purified succinic acid produced by the same

Growing community of inventors

Taipei, Taiwan

Cheng-Hsun Chen