Shanghai Huayi Acrylic Acid Co., Ltd.

Shanghai Huayi New Material Co., Ltd.

Xiaoqi Zhao

Yan Zhuang

Ge Luo

Xin Wen

Xiaodong Chu

Jingming Shao

Jianxue Ma

Yong Chen

Tonghao Wu

Jinhua Ji

Chunhua Qin

Xuemei Li

Linghua Zuo

A method for preparing methacrolein from t-butanol, specifically a method for preparing methacrolein by using t-butanol as a starting material, is disclosed, comprising passing the starting material through a fixed bed reactor filled with catalyst, wherein the fixed bed reactor is divided to n reaction zones from the inlet of the starting material to the outlet of the starting material and each zone is filled with catalysts of different catalytic activities; wherein the catalytic activity of the catalyst in the first reaction zone is higher than the catalytic activity of the catalyst in the second reaction zone, and the catalytic activity of the catalyst is gradually increased from the second reaction zone to the last reaction zone; and n is an integer between 3 to 10.

Methods for preparing methacrolein from t-butanol

The present invention provides a process for regenerating a deactivated heteropolymolybdophosphoric acid catalyst, comprising the steps of grinding the deactivated catalyst into particles having a particle size of 40 mesh or less, mixing the particles with a mixture comprising aqua ammonia, an aqueous solution containing ammonium ions and organic auxiliaries, kneading the same in a kneader to obtain a paste, drying the paste, molding the paste into cylindrical particles with a through hole in its longitudinal axis, and heating the paste in atmosphere at 350&#x2dc;450&#xb0; C. for 1&#x2dc;10 hours to produce the generated catalyst.

Process for regenerating a deactivated heteropolymolybdophosphoric acid catalyst

The present invention provides a preparation process of complex oxides catalyst containing Mo, Bi, Fe and Co, which comprising steps as following: dissolving precursor compounds of the components for catalyst and complexing agent in water to obtain a solution, and then drying, molding and calcining the solution to obtain catalyst. The catalyst is used for gas phase oxidation of light alkenes to unsaturated aldehydes. The catalyst has high activity, selectivity and stability. The reaction condition is mild. The preparation process of the catalyst is easy to operate and can be used for mass production.

Preparation process of a catalyst used for gas phase oxidation of light alkenes to unsaturated aldehydes

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Shanghai, China

Xiaoqi Zhao