Shanghai Huayi Acrylic Acid Co., Ltd.

Shanghai Huayi New Material Co., Ltd.

Other

Jianxue Ma

Yan Zhuang

Ge Luo

Xiaodong Chu

Tonghao Wu

Jingming Shao

Xuemei Li

Jinhua Ji

Chunhua Qin

Xin Wen

Xiaoqi Zhao

Kun Jiao

Jian Wang

Yong Chen

Xiaodong Zhu

Xiaoxia Wang

Xinlei Jin

Desheng Xiong

Shiqiang Feng

Kaimin Shi

Xiadong Chu

Disclosed is a method for preparing a heteropolyacid salt catalyst, comprising dissolving the lead compounds for each element to prepare a suspension and dispersion slurry of catalyst precursor, which comprises all of the catalyst components; drying the catalyst precursor, mixing them with an organic compound, molding, and calcining to produce the catalyst.

Heteropolyacid salt catalysts and their preparation method

Disclosed are a molybdenum based composite oxide catalyst, its preparation method and use. The catalyst has the following general formula: BiMoMNO; wherein M is one of V, Cr, Mn, Fe, Co, Ni and Cu, or a mixture of two or more of V, Cr, Mn, Fe, Co, Ni and Cu in any ratio; N is one of Na, K, Cs, Ca and Ba, or a mixture of two or more of Na, K, Cs, Ca and Ba in any ratio; x=0.5&#x2dc;20; y=0.05&#x2dc;20; z=0.01&#x2dc;5; a is a number satisfying the valance of each atom. The catalyst is prepared by the following method: firstly mixing a certain amount of the lead metal oxides according to the chemical proportion and then grinding the mixture with high-energy ball milling for a period of time to obtain the molybdenum based composite oxide catalyst. The catalyst exhibits excellent performance when using for preparation of butadiene by oxidative dehydrogenation of butene, and the preparation process is simple, controllable, and repeatable. Waste water or waste gas that is difficult to be treated is not produced during preparation.

Molybdenum based complex oxide catalyst, its preparation method and use

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 complex oxide catalyst whose general formula is MoVCuWXYO/Z. reducing agent needs to be added into the catalyst during the preparation process of the active component of the catalyst and (or) molding process of the catalyst. Specifically, X is at least one selected from a group consisting of Nb, Sb, Sr, Ba and Te; Y is at least one selected from a group consisting of La, Ce, Nd, Sm and Cs; 'a' is ranging from 2 to 8; 'b' is ranging from 1 to 6; &#x201c;c&#x201d; is ranging from 0.5 to 5; &#x201c;d&#x201d; is ranging from 0.01 to 4; &#x201c;e&#x201d; is ranging from 0.01 to 4; f is determined by the oxidation state of the component element; Z is silicon powder; the reducing agent is C2&#x2dc;C6 diol or polyol.

Preparation process of a complex oxide catalyst and application thereof to the synthesis of the acrylic acid

A method of preparing a catalyst for producing acrolein by oxidation of propylene at high space velocity, said catalyst is a Mo&#x2014;Bi&#x2014;Fe&#x2014;Co based composite metal oxide. Producing unsaturated aldehyde via partial oxidation of lower unsaturated olefin at high space velocity using said catalyst is suitable for process with or without off-gas recirculating. Said catalyst is prepared by co-precipitation, the reaction conditions for using said catalyst to produce unsaturated aldehyde are, the space velocity of unsaturated lower olefin relative to catalyst being 120&#x2dc;200 h-1(STP), reaction temperature being 300&#x2dc;420&#xb0; C. and absolute pressure being 0.1&#x2dc;0.5 MPa; a single-stage unsaturated lower olefin conversion ratio of greater than 98.0% and carbon oxide yield of less than 3.3% with an overall yield of unsaturated lower aldehyde and acid of greater than 94.0% are obtained. The process to prepare the said catalyst is simple, easy to be repeated, and capable of industrial scale-up.

Catalyst for producing unsaturated aldehyde by oxidation of lower olefin at high space velocity

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

Jianxue Ma