Peking University

Beijing Boyuan Hengsheng High-Technology Co., Ltd.

Yongfeng Boyuan Industry Co., Ltd., Jiangxi Province

Lifang Li

Li Long Chen

Xionghui Wei

Chun Hu

Meihua Zou

Xiangbin Li

Ming Wang

Yong Sun

Jiaxu Liu

Shaoyang Sun

Jianbai Xiao

Mingjin Wan

Li Chen

Jun Wang

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.

A method for removing SOfrom a gas by using a modified polyethylene glycol solution to absorb the SOin the gas. The modified polyethylene glycol solution is contacted with the gas containing SOto absorb the SOin the gas, wherein x=2 and/or 3, the modified polyethylene glycol is a product derived from etherifying hydroxyl groups in the molecules of ethylene glycol and/or polyethylene glycol and has a general formula: R&#x2014;(O&#x2014;CH)&#x2014;O&#x2014;R, where n is a positive integer, Rand Rare the same or different and are each independently alkyl, alkenyl, alkynyl, acyl or aryl.

Method for removing SOx from gas with modified polyethylene glycol

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Jiangxi, China

Lifang Li