Molybdenum-vanadium based composite oxide catalyst and preparation and application thereof

A technology of composite oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problems of difficult handling, low atom economy, and cost Low potential and other problems, to achieve low cost, improved atom economy, and low cost

Active Publication Date: 2014-07-02
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The principle of this method is to dehydrate and decarboxylate tartaric acid to generate pyruvic acid, carbon dioxide and water. The atom economy is not high, and the potential for cost reduction is not great, and potassium bisulfate will react to generate sulfur dioxide gas waste, which is not easy to deal with in terms of environmental protection.

Method used

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  • Molybdenum-vanadium based composite oxide catalyst and preparation and application thereof
  • Molybdenum-vanadium based composite oxide catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of molybdenum vanadium niobium catalyst: Dissolve 3.63g ammonium metavanadate and 7.2g oxalic acid in 25ml ultrapure water, take 10.77g ammonium paramolybdate and dissolve it in 25ml ultrapure water. Mix the solution dissolved in ultrapure water evenly, and heat it to 50°C, take 2.42g of ammonium niobate oxalate hydrate and dissolve it in 25ml of ultrapure water, add it dropwise to the mixed solution, and stir under vacuum at 80°C until the solvent evaporated completely. Dry overnight at 120°C, followed by calcination at 400°C for 4 hours in a dry air atmosphere with an air flow rate set at 100 ml / min. The obtained solid powder is Mo 1 V 0.51 Nb 0.13 o x catalyst.

[0033] The process of synthesizing pyruvic acid: In the fixed bed reactor, load the above 0.5g molybdenum vanadium niobium composite oxide catalyst, use 0.5g quartz sand to dilute, reactants are fed continuously, and the mass space velocity is 2.4h -1 , the air flow rate is 150ml / min, the m...

Embodiment 2

[0035] Preparation of molybdenum vanadium niobium catalyst: Dissolve 3.63g ammonium metavanadate and 7.2g oxalic acid in 25ml ultrapure water, take 10.77g ammonium paramolybdate and dissolve it in 25ml ultrapure water. The solution dissolved in ultrapure water was mixed evenly, and heated to 50°C, 0.89g of antimony oxide was dispersed in 50ml of oxalic acid aqueous solution, added dropwise to the mixed solution, and stirred in vacuum at 80°C until the solvent evaporated completely. Dry overnight at 120°C, followed by calcination at 400°C for 4 hours in a dry air atmosphere with an air flow rate set at 100 ml / min. The obtained solid powder is Mo 1 V 0.51 Sb 0.1 o x catalyst.

[0036] The process of synthesizing pyruvic acid: In the fixed bed reactor, load the above 0.5g molybdenum vanadium niobium composite oxide catalyst, use 0.5g quartz sand to dilute, reactants are fed continuously, and the mass space velocity is 2.4h -1 , the air flow rate is 150ml / min, the molar ratio...

Embodiment 3

[0038]Preparation of molybdenum vanadium niobium catalyst: Dissolve 2.42g ammonium metavanadate and 5g oxalic acid in 25ml ultrapure water, and dissolve 10.77g ammonium paramolybdate in 25ml ultrapure water. Mix the solution in ultrapure water evenly, and heat it to 50°C, dissolve 2.42g of ammonium niobate oxalate hydrate in 25ml of ultrapure water, add it dropwise to the mixed solution, and stir in vacuum at 80°C until The solvent evaporated completely. Dry overnight at 120°C, followed by calcination at 400°C for 4 hours in a dry air atmosphere with an air flow rate set at 100 ml / min. The obtained solid powder is Mo 1 V 0.34 Nb 0.13 o x catalyst.

[0039] The process of synthesizing pyruvic acid: In the fixed bed reactor, load the above-mentioned 0.5g molybdenum vanadium niobium composite oxide catalyst, use 0.5g quartz sand to dilute, reactants are fed continuously, and the mass space velocity is 2.4h -1 , the air flow rate is 150ml / min, the molar ratio of oxygen in th...

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Abstract

The invention relates to a molybdenum-vanadium based composite oxide catalyst and a preparation and an application thereof. The molybdenum-vanadium based composite oxide catalyst has the general formula of Mo1VaXbYcOd which is a composite metal oxide, wherein X is at least one element of niobium, antimony, bismuth, tellurium, tungsten, cobalt, nickel and neodymium; Y is at least one element of palladium, platinum, gold, silver, rhodium, potassium and cesium; a, b, c and d represent atomic ratios of vanadium, X, Y and oxygen to molybdenum respectively; a is 0.1-1.0, b is 0-0.3, c is 0-0.2, and d is a number which is determined by valence numbers of other elements existing in the composite metal oxide of the general formula and is the same as the valence numbers. The catalyst is used for selectively oxidizing lactic acid into pyruvic acid at the temperature of lower than 300 DEG C. The catalyst used in the method is easy to prepare and high in activity, and has high selectivity for the product pyruvic acid under the condition of semi-oxidation reaction. Compared with an existing method, the synthetic method of pyruvic acid has the advantages that the reaction materials are low in cost and easily available, the technological operation is simple, the reaction atom economy is high, and the selectivity for pyruvic acid is high.

Description

field of invention [0001] The method of the invention is a method for synthesizing pyruvic acid, specifically the preparation and application of a molybdenum-vanadium-based composite oxide catalyst. Background technique [0002] Pyruvate is the simplest molecular structure among α-keto acids, a key compound in biochemical metabolic pathways, and is often used as an intermediate in drug synthesis and organic synthesis. In the medical and health care industry, pyruvate is an important synthetic intermediate, which can be used to synthesize L-tryptophan, L-tyrosine, alanine and L-dihydroxyphenylalanine. Calcium pyruvate, a derivative of pyruvate, is the main ingredient in the highly effective weight-loss health care medicines currently on the market. In the daily chemical industry, pyruvic acid can also be used as the basic raw material for the synthetic fruit and vegetable preservative TBZ, and pyruvic acid and its derivatives are also added to cosmetics as preservatives and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/652C07C59/19C07C51/373
CPCY02E50/343Y02E50/30
Inventor 李学兵宋亮苗诗轩
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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