Single-phase composite metal oxide catalyst as well as preparation method and application thereof

A composite metal and oxide technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, carbon-based compound preparation, organic compound preparation, etc., can solve the problems of pollution and low atom utilization rate, and reduce the surface Effects of acidity, enhanced redox capacity, high feedstock conversion and product selectivity

Pending Publication Date: 2020-05-22
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of industrial production of MMA in my country is mainly the acetone cyanohydrin method, but this method is restricted from further development due to the serious pollution caused by the use of highly toxic hydrocyanic acid raw materials and the low utilization rate of atoms.

Method used

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  • Single-phase composite metal oxide catalyst as well as preparation method and application thereof
  • Single-phase composite metal oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a single-phase composite metal oxide catalyst, the steps are as follows:

[0034] (1) Get 25g ammonium molybdate and dissolve in 160mL deionized water to obtain solution A;

[0035] (2) Get 13.78g cobalt nitrate and 9.3g bismuth nitrate and be dissolved in 20mL nitric acid solution, obtain solution B;

[0036] (3) Dissolve 14.75g of ferric nitrate in 20mL of deionized water to obtain solution C;

[0037] (4) Stir solution A at 60°C, add solution B and solution C to solution A dropwise, and continue stirring for 30 minutes to obtain a mixed solution;

[0038] (5) React the mixed solution in step (4) by hydrothermal method, put it into a reaction kettle, stir and age, the hydrothermal temperature is 120° C., react for 6 hours, and filter with suction;

[0039] (6) After aging, after drying in an oven at 120°C, pulverize and roast at 550°C to obtain a single-phase composite metal oxide catalyst, the molar ratio of Mo, Bi, Co, and Fe in the resulti...

Embodiment 2

[0041] A preparation method of a single-phase composite metal oxide catalyst, the steps are as follows:

[0042] (1) Get 25g ammonium molybdate and dissolve in 160mL deionized water to obtain solution A;

[0043] (2) Get 13.78g cobalt nitrate and 9.3g bismuth nitrate and be dissolved in 20mL nitric acid solution, obtain solution B;

[0044] (3) Dissolve 14.75g of ferric nitrate and 2.96g of manganese nitrate in 20mL of deionized water to obtain solution C;

[0045] (4) Stir solution A at 70°C, add solution B and solution C to solution A dropwise, and continue stirring for 20 minutes to obtain a mixed solution;

[0046] (5) React the mixed solution in step (4) by hydrothermal method, put it into a reaction kettle, stir and age, the hydrothermal temperature is 140° C., react for 4 hours, and filter with suction;

[0047] (6) After aging, after drying in an oven at 120°C, pulverize and roast at 520°C to obtain a single-phase composite metal oxide catalyst, the molar ratio of Mo...

Embodiment 3

[0049] A preparation method of a single-phase composite metal oxide catalyst, the steps are as follows:

[0050] (1) Get 25g ammonium molybdate and dissolve in 160mL deionized water to obtain solution A;

[0051] (2) Get 13.78g cobalt nitrate and 9.3g bismuth nitrate and be dissolved in 20mL nitric acid solution, obtain solution B;

[0052] (3) Dissolve 14.75g of ferric nitrate and 2.86g of copper nitrate in 20mL of deionized water to obtain solution C;

[0053] (4) Stir solution A at 55°C, add solution B and solution C to solution A dropwise, and continue stirring for 35 minutes to obtain a mixed solution;

[0054] (5) React the mixed solution in step (4) by hydrothermal method, put it into a reaction kettle, stir and age, the hydrothermal temperature is 160° C., react for 3 hours, and filter with suction;

[0055] (6) After aging, after drying in an oven at 140°C, pulverize and roast at 540°C to obtain a single-phase composite metal oxide catalyst, the molar ratio of Mo, B...

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a single-phase composite metal oxide catalyst as well as a preparation method and application thereof. The catalyst provided by the invention shows a very high raw material conversion rate and high product selectivity in the reaction of preparing methacrolein by selective oxidation of isobutene; compared with existing heterogeneous composite metal oxide catalysts, the prepared single-phase catalyst can effectively reduce the barrier between the active sites required to be overcome by the component transfer,can accelerate the electron transfer rate, improve the oxidation reduction ability of the catalyst, and reduce the surface acidity so as to improve the isobutene conversion rate and the yield of the target product methacrolein, and is expected to be industrially applied.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a single-phase composite metal oxide catalyst, its preparation method and application. Background technique [0002] Methyl methacrylate (MMA) is an important organic chemical intermediate, mainly used in the production of plexiglass, surface coatings, PVC modifiers, etc., and has been widely used in fine chemicals, national defense, and construction. At present, the process of industrial production of MMA in my country is mainly the acetone cyanohydrin method, but the disadvantages of this method, such as the use of highly toxic hydrocyanic acid raw materials, cause serious pollution, and low atomic utilization rate, limit its further development. The production of MMA by isobutylene oxidation has attracted more and more attention due to its green and environmental protection characteristics. The team of Academician Zhang Suojiang, Institute of Process Technology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J23/889C07C45/35C07C47/22
CPCB01J23/8876B01J23/8892B01J23/002C07C45/35B01J2523/00C07C47/22B01J2523/27B01J2523/54B01J2523/68B01J2523/842B01J2523/845B01J2523/847B01J2523/17B01J2523/72
Inventor 王磊王国梁房德仁任万忠王文华
Owner YANTAI UNIV
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