Chinese Academy of Sciences

Shanxi Lu'an Mining (group) Co., Ltd.

Taiyuan University of Technology

Jiaqi Guo

Min Zhang

Jianguo Wang

Weibin Fan

Mei Dong

Dongfei Wang

Yaning Xiao

Guofu Wang

Shoujing Sun

Weilin Wang

Juncai Zhang

Youliang Cen

Yunhong Li

Pengfei Wang

Ruifeng Guo

Xiaomin Ma

Yuping Fan

Xianshu Dong

Yuanpeng Fu

A preparation method and an application of a tailings-based zeolite@carbon dots-titanium dioxide (CDs-TiO) composite photocatalyst are provided, which relates to the field of solid waste utilization technologies. The preparation method includes performing an acidification treatment on tailings powder and then roasting to obtain modified tailings powder; adding the modified tailings powder and titanium dioxide into lye to obtain mixed suspension; stirring and aging the mixed suspension under ultraviolet irradiation to obtain an aged suspension, performing a hydrothermal reaction on the aged suspension to obtain a product, filtering, washing and drying the product to obtain the tailings-based zeolite@CDs-TiOcomposite photocatalyst. The tailings-based zeolite@CDs-TiOcomposite photocatalyst is used to degrade methylene blue, and the photocatalyst is used to treat an organic pollutant in water, which has advantages including a shift in response wavelength and a high photocatalyst activity, and the composite photocatalyst can be applied in an environmental protection field.

Preparation method and application of tailings-based zeolite@CDs-TiOcomposite photocatalyst

A continuous slurry-bed tank reactor, comprising a tank reactor body, an agitator, and tubular separation membranes. A method of using the continuous slurry-bed tank reactor comprising adding a catalyst, feeding reactants, stopping feeding the reactants, starting a heating system, changing directions of the reactants flowing through the tubular separation membranes.

Continuous slurry-bed tank reactor and method of using same

The disclosure relates to a process for continuously producing polyoxymethylene dimethyl ethers at low temperature, pertains to the technical field of polyoxymethylene dimethyl ether preparation processes, and solves the technical problem of continuous production of polyoxymethylene dimethyl ether. A membrane separation element with precisely controlled pores in membrane is used to realize a direct separation of the feedstocks from the catalyst within the reactor, and effectively reduce the permeation resistance of the separation membrane tube. By oppositely switching the flowing direction of liquid reaction materials, the adhesion of the catalyst to the separation membrane tube is inhibited, and some particles stuck in separation membrane tube are removed, which ensures the continuous operation of the reaction process and allows a molecular sieve catalyst to exhibit its advantage of long catalytic life.

Process for continuously producing polyoxymethylene dimethyl ethers at low temperature

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Taiyuan, China

Jiaqi Guo