Shanghai Huayi Group

Shanghai, China

Shanghai Huayi Group

Shanghai, China
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Patent
Shanghai HuaYi New Material Co. and Shanghai Huayi Group | Date: 2015-12-07

Disclosed are a molybdenum based composite oxide catalyst, its preparation method and use. The catalyst has the following general formula: BiMo_(x)M_(y)N_(z)O_(a); 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=0.520; y=0.0520; z=0.015; 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.


Patent
Shanghai Huayi Group and Shanghai HuaYi New Material Co. | Date: 2015-12-04

Disclosed are a ferrite catalyst, its preparation method and use. The catalyst has a formula of FeA_(a)D_(b)O_(c), wherein A is Mg atom, Zn atom or a mixture of these two atoms in any ratio; D is one or more atoms elected from the group consisting of Ni, Co, Mn, Ca, Mo or V; a=0.010.6; b=00.30; c is a number satisfying the valence. The catalyst is prepared by a method comprising mixing the metal oxide precursors according to the chemical ratios and grinding by ball milling to obtain the ferrite catalyst. The catalyst exhibits excellent activity and selectivity when used in a reaction for preparing butadiene by oxidative dehydrogenation of butene. The preparation of the catalyst is simple, controllable and well repeatable, with reduced waste water and waste gas during preparation.


Patent
Shanghai Huayi Group and Shanghai HuaYi New Material Co. | Date: 2015-12-04

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.


Patent
Shanghai Huayi Group and Shanghai HuaYi New Material Co. | Date: 2015-12-04

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.


The present invention provided 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 same with a mixture consisting of aqua ammonia, an aqueous solution containing ammonium ion and organic auxiliaries and kneading same in a kneader to obtain a paste, drying the paste and molding into cylindrical particle with a through hole in its longitudinal axis, and heating in atmosphere at 350 - 450C for 1 ~ 10 hours to produce the generated catalyst. The catalytic capacity of such a catalyst having keggin structure of heteropoly acid fully recovered is fully restored for selective oxidation of lower unsaturated aldehydes (such as acrolein or isobutyraldehyde) to produce unsaturated acids. The regeneration is conducted under mild condition by a simple and easy process with good reproducibility.


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, which is an aqueous solution containing ammonium ions and organic auxiliaries, kneading the mixture of particles and aqua ammonia 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 350450 C. for 110 hours to produce the generated catalyst.


A method of preparing a catalyst for producing acrolein by oxidation of propylene at high space velocity, said catalyst is a Mo-Bi-Fe-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 processes with or without off-gas recirculation. 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 200h^(-1)(STP), reaction temperature being 300 - 4200C and absolute pressure being 0.1 0.5 MPa. A single-stage unsaturated lower olefin conversion ratio of greater than 98.0% and a 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.


Patent
Shanghai Huayi Group | Date: 2013-11-21

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_(3), WO_(3), TiO_(2 )and ZrO_(2); 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 5-10 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. x(Mo_(12)P_(a)K_(b)V_(c)D_(d)E_(e)O_(f))/yZ


Patent
Shanghai Huayi Group | Date: 2013-11-21

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, aluminium phosphate, aluminium dihydrogen phosphate, ferric phosphate, magnesium phosphate, zinc phosphate, MgAl 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. x(FeA_(a)D_(b)O_(c))/yZ


A method of preparing a catalyst for producing acrolein by oxidation of propylene at high space velocity, said catalyst is a MoBiFeCo 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 120200 h-1(STP), reaction temperature being 300420 C. and absolute pressure being 0.10.5 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.

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