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Preparation and application of titanium dioxide loaded molybdenum trioxide and vanadium pentoxide catalyst

A technology of vanadium pentoxide catalyst and titanium dioxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, organic compound preparation, physical/chemical process catalyst, etc., which can solve the problems of poor product quality, harsh reaction conditions, Low yield and other problems, to achieve the effect of improved selectivity, excellent performance, and low preparation cost

Pending Publication Date: 2022-04-12
JIANGSU JINJU ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of methods for producing methyl glyoxylate have been reported, but the harsh reaction conditions, poor product quality, and low yield limit their development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of titanium dioxide precursor

[0024] Mix and stir 193.548 g (titanyl sulfate content: 93%) titanyl sulfate sulfate hydrate with 3 L of deionized water and raise the temperature to 50° C. to prepare a titanium dioxide precursor.

[0025] 2. Preparation of catalyst precursor

[0026] Take 6.133g of ammonium paramolybdate and 6.427g of ammonium metavanadate, pour them into 5L of deionized water, adjust the pH to 4 with nitric acid under stirring, mix for 1 hour, then reflux for 8 hours, cool naturally to below 50°C, and then pour into titanium dioxide In the precursor, a catalyst precursor is arranged.

[0027] 3. Preparation of catalyst

[0028] The catalyst precursor was spray-dried, and the drying conditions were: the inlet temperature of circulating hot air was 200°C, the outlet temperature was 120°C, and the feed rate was 500mL / h. The powder is calcined, and the calcining curve is: room temperature to 200°C (50°C / h); 200°C for 2 hours; 200 to 350°C...

Embodiment 2

[0032] 1. Preparation of titanium dioxide precursor

[0033] Mix and stir 182.796g (titanyl sulfate content: 93%) titanyl sulfate sulfate hydrate and 3L of deionized water and raise the temperature to 50° C. to prepare a titanium dioxide precursor.

[0034] 2. Preparation of catalyst precursor

[0035] Take 6.133g of ammonium paramolybdate and 12.855g of ammonium metavanadate, pour them into 5L of deionized water, adjust the pH to 4 with nitric acid under stirring, mix for 1 hour, then reflux for 8 hours, cool naturally to below 50°C, and then pour into titanium dioxide In the precursor, a catalyst precursor is arranged.

[0036] 3. Preparation of catalyst

[0037] The catalyst precursor was spray-dried, and the drying conditions were: the inlet temperature of circulating hot air was 200°C, the outlet temperature was 120°C, and the feed rate was 500mL / h. The powder is calcined, and the calcining curve is: room temperature to 200°C (50°C / h); 200°C for 2 hours; 200 to 350°C (...

Embodiment 3

[0041] 1. Preparation of titanium dioxide precursor

[0042] Mix and stir 182.796g (titanyl sulfate content: 93%) titanyl sulfate sulfate hydrate and 3L of deionized water and raise the temperature to 50° C. to prepare a titanium dioxide precursor.

[0043] 2. Preparation of catalyst precursor

[0044] Take 12.265g of ammonium paramolybdate and 6.427g of ammonium metavanadate, pour them into 5L of deionized water, adjust the pH to 4 with nitric acid under stirring, mix for 1 hour, then reflux for 8 hours, cool naturally to below 50°C, then pour into titanium dioxide In the precursor, a catalyst precursor is arranged.

[0045] 3. Preparation of catalyst

[0046] The catalyst precursor was spray-dried, and the drying conditions were: the inlet temperature of circulating hot air was 200°C, the outlet temperature was 120°C, and the feed rate was 500mL / h. The powder is calcined, and the calcining curve is: room temperature to 200°C (50°C / h); 200°C for 2 hours; 200 to 350°C (25°C...

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PUM

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Abstract

The invention relates to preparation and application of a titanium dioxide loaded molybdenum trioxide and vanadium pentoxide catalyst, and belongs to the technical field of catalyst preparation. The active component of the catalyst is a compound composed of molybdenum oxide and vanadium oxide, the catalytic activity of the compound can be adjusted through the ratio of molybdenum oxide to vanadium oxide so as to improve the selectivity of a target product, and the catalyst mainly comprises a molecular sieve, heteropoly acid and the like and is excellent in aldehyde synthesis performance through alcohol oxidation. However, the defects of high preparation cost, high wastewater and the like exist. In the catalyst preparation process, only the ammonium sulfate aqueous solution is generated and can be used as a nitrogen fertilizer, no three wastes are generated, the preparation cost is low, and the performance is excellent.

Description

technical field [0001] The invention relates to the preparation and application of a titanium dioxide-supported molybdenum trioxide and vanadium pentoxide catalyst, which belongs to the technical field of catalyst preparation. Background technique [0002] At present, methyl glyoxylate is widely used in chemical industry, medicine, materials and other fields due to its chemical properties of both aldehyde and ester, which has attracted the attention of researchers. A variety of methods for producing methyl glyoxylate have been reported, but the disadvantages of harsh reaction conditions, poor product quality, and low yield limit their development. In contrast, the preparation of methyl glyoxylate by oxidation of methyl glycolate has the most development prospects due to its simple process, low cost, high product quality and environmental protection advantages. [0003] Many transition metals have been used as catalysts in the oxidation of alcohols to aldehydes. Among them,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28C07C67/313C07C69/716
Inventor 于克生杨孝智耿光娟贺婷停邢周昊胡晓鸣梁鹏孙朝辉王斌
Owner JIANGSU JINJU ALLOY MATERIAL
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