Zhejiang University

Zhejiang Juhua New Material Research Institute Co., Ltd.

Baogen Su

Zhiguo Zhang

Qiwei Yang

Zongbi Bao

Qilong Ren

Huabin Xing

Yiwen Yang

Minhui Huang

Liyang Zhou

Hongfeng Li

Shuran Duan

Qianqian Zhou

Shuhua Wang

Wenjun Zhang

Wei Qin

Provided is a method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE). The method includes: subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product, and subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas including the tetrafluoromethane, wherein the plasma pyrolysis reaction is performed at a temperature of 1,800 K to 5,000 K.

Method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene

The present invention discloses a process for preparing L-arabinose from Gum Arabic comprising the steps of catalytical hydrolysis of L-arabinose from gum arabic followed by the purification steps including neutralization using alkali, adsorption bleaching, electrodialysis desalination, adsorption separation of impurities and crystallization, with the absolute purity of L-arabinose up to 98% and the recovery as high as 25%&#x2dc;29% of material weight. The disclosed process has such advantages as low cost, environmental-friendliness and simple operation, showing promising in industrial production.

Process for preparing high-purity L-arabinose by using arabic gum as raw material

The present invention discloses a process for preparing high-purity raffinose from defatted wheat germ comprising the steps of percolate extraction of raffinose from defatted wheat germ, decoloration by extraction from the abstraction liquid, electrodialysis desalination, impurity removal by simulated moving bed, concentration and crystallization, with the absolute purity of raffinose as high as 98% and the recovery up to 75%. The process is not only reliable and easy to operate, but also easy to realize industrial production and control the parameters.

Technology for extracting and preparing high-purity raffinose from defatted wheat germ

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Hangzhou, China

Baogen Su