Peking University

Beijing Boyuan Hengsheng High-Technology Co., Ltd.

Yongfeng Boyuan Industry Co., Ltd., Jiangxi Province

Dalian University of Technology

Dalian Qiyuan Technology Co., Ltd.

China University of Petroleum

Petrochemical Research Institute of Cnpc

Jiaxu Liu

Ming Wang

Li Long Chen

Yong Sun

Xionghui Wei

Chun Hu

Meihua Zou

Lifang Li

Xiangbin Li

Li Chen

Jun Wang

Hongchen Guo

An Ma

Quanren Zhu

Cuilan Miao

Shaoyang Sun

Jianbai Xiao

Mingjin Wan

Ning He

Yanhui Yi

Xiuyi Li

Fei Liu

Chunyi Li

Guowei Wang

Changming Li

An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cmand below 980 cm.

Alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and preparation method thereof

A method for removing SOfrom a gas by using a polyol composite solution is provided. The polyol composite solution is made by mixing a polyol with an organic acid and/or organic acid salt, the polyol composite solution is brought into contact with the gas containing SOto absorb the SOin the gas, wherein x=2 and/or 3, and the polyol refers to an organic compound other than ethylene glycol and polyethylene glycol, which contains simultaneously two or more than two hydroxyl groups in a same organic molecule.

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A method for removing SOfrom a gas by using a compound alcohol-amine solution is provided. The compound alcohol-amine solution is made by mixing ethylene glycol and/or polyethylene glycol with hydroxyl and/or carboxyl organic compound having basic group containing nitrogen. The compound alcohol-amine solution is contacted with the gas containing SOto absorb the SOin the gas, wherein x=2 and/or 3. The compound alcohol-amine solution with absorbed SOis regenerated by one or more of heating method, vacuum method, gas stripping method, ultrasonic method, microwave method, and radiation method to release by-products of sulfur dioxide and sulfur trioxide, and the regenerated compound alcohol-amine solution is recycled for use. This method can be used for removing SOfrom flue gas, burning gas, coke-oven gas, synthesis waste gas from dyestuff plants, sewage gas from chemical fiber plants, and other industrial raw material gases or waste gases containing SO.

An ethylene glycol composite solution is used for removing SOfrom a gas. The ethylene glycol composite solution is made by mixing ethylene glycol and/or polyethylene glycol with an organic acid and/or organic acid salt containing no nitrogen atom in a molecule. The ethylene glycol composite solution is brought into contact with the gas containing SOto absorb the SOin the gas. The ethylene glycol composite solution loaded with absorbed SOis regenerated by heating, vacuuming, gas stripping, ultrasonic treatment, microwave treatment, or radiation treatment to release by-products of sulfur dioxide and sulfur trioxide, and the regenerated ethylene glycol composite solution is recycled for use.

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Beijing, China

Jiaxu Liu