Shanghai Huayi Acrylic Acid Co., Ltd.

Shanghai Huayi New Material Co., Ltd.

Other

Xiaodong Chu

Yan Zhuang

Ge Luo

Tonghao Wu

Xin Wen

Jingming Shao

Jianxue Ma

Xinlei Jin

Jinhua Ji

Chunhua Qin

Xiaoqi Zhao

Jinghua Ji

Jian Wang

Jun Yin

Yong Chen

Xuemei Li

Kun Jiao

Desheng Xiong

Kaimin Shi

Shuju Liu

Shengxian Xu

Zhigang Qian

Jiangxue Ma

Linghua Zuo

A (methyl)acrolein oxidation catalyst and a preparation method therefor-in which the catalyst has a composition represented by the following formula: x(Mo12PaCsbVcDeOf)+tC/yZ in which MoPCVDOis a heteropolyacid salt main catalyst; C is a nano carbon fiber additive, and Z is a carrier thermal conduction diluent; Mo, P, Cs, V, and O represent the elements of molybdenum, phosphorus, cesium, vanadium, and oxygen, respectively; D represents at least one element selected from the group consisting of copper, iron, magnesium, manganese, antimony, zinc, tungsten, silicon, nickel, and palladium; a, b, c, e, and f represent the atomic ratio of each element, a=0.1-3, b=0.01-3, c=0.01-5, e=0.01-2, and f being the atomic ratio of oxygen required to satisfy the valence of each of the described components; x and y represent the weights of the main catalyst and the carrier thermal conduction diluent Z, and y/x=11.1-50%; and t represents the weight of the nano carbon fiber, and t/x=3-10%.

(Meth)acrolein oxidation catalyst and preparation method thereof

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 ferrite catalyst and preparation methods thereof. The catalyst is provided with a formula below, wherein A is Mg atom, Zn atom or a mixture of both atoms at any ratio; D is one or more atoms selected from the group consisting of Ni, Co, W, Mn, Ca, Mo or V atom; Z is a catalyst carrier, which is one or more selected from the group consisting of calcium phosphate, calcium dihydrogen phosphate, aluminum phosphate, aluminum dihydrogen phosphate, ferric phosphate, magnesium phosphate, zinc phosphate, Mg&#x2014;Al hydrotalcite, calcium carbonate, magnesium carbonate; a=0.01-0.6; b=0-0.30; c is a number balancing each valence; x, y represent the amounts of principal catalyst and carrier Z respectively, wherein the weight ratio y/x=0.5:1-7:1.(FeADO)/Z

Ferrite catalyst and preparation method thereof

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

Disclosed are a catalyst and preparation method and use thereof. The catalyst has a constitution represented as the formula below, wherein, D represents at least one element selected from the group consisting of copper, magnesium, manganese, stibium and zinc; E represents at least one element selected from the group consisting of tungsten, silicon, nickel, palladium, ferrum and plumbum; Z is selected from the group consisting of SiC, MoO, WO, TiOand ZrO; y/x=11.1-50:100; a=0.1-3; b=0.01-5; c=0.01-5; d=0.01-3; e=0.01-2; f is the proportion of oxygen atom balancing the valence. The method comprises: (i) formulating Solution A with molybdenum, phosphorus, and vanadium compounds; formulating Solution B with dissolve potassium compound and a D-containing compound; formulating Solution C with an E-containing compound; (ii) mix Solutions A, B and C under a temperature of &#x2212;5-10&#xb0; C.; (iii) pre-calcination (iv) adding graphite powder and the diluting heat-conductive agent, wherein the weight ratio between the diluting heat-conductive agent and the catalyst precursor (y/x) is 11.1-50%; and (v) calcination.(MoPKVDEO)/Z

Heteropoly acid salt catalyst and its preparation method

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

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

There is provided a method for rectifying a vinyl compound liquor. The method includes the steps of a) providing a rectification column operated at a temperature and pressure and b) feeding the vinyl compound liquor to be rectified into the rectification column, wherein the pressure of the rectification column and the temperature of the fed vinyl compound liquor are controlled, such that the temperature of the fed vinyl compound liquor ranges from its bubble point at the pressure of the rectification column to 10&#xb0; C. lower than the bubble point.

Method for producing (meth)acrylic acid and (meth)acrylic esters

Growing community of inventors

Shanghai, China

Xiaodong Chu