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Acrolein oxidation to acrylic acid catalyst, preparation method and application of catalyst

A technology of catalyst and acrolein, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problems of low selectivity and yield of acrylic acid, and achieve improvement Reaction performance, good technical effect, effect of yield improvement

Inactive Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the low selectivity and yield of acrylic acid in the prior art, and a new catalyst for acrolein oxidation to acrylic acid is provided

Method used

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  • Acrolein oxidation to acrylic acid catalyst, preparation method and application of catalyst
  • Acrolein oxidation to acrylic acid catalyst, preparation method and application of catalyst
  • Acrolein oxidation to acrylic acid catalyst, preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 100 g (NH 4 ) 6 Mo 7 O 24 ·4H 2 O was added to 100 g of warm water at 70 °C, stirred to dissolve it completely, 68.6 g of 40% (wt.) silica sol, 63.3 g of 20% (wt.) aluminum sol and 16.6 g (NH 4 ) 6 H 5 [H 2 (WO 4 ) 6 ] to make material A.

[0053] 32.8 g Ce(NO 3 ) 3 ·6H 2 O was added to 20 grams of 70 ℃ hot water, stirred to dissolve, and then added 26.3 grams of Zr (NO 3 ) 4 ·6H 2 O, 31.9 g Cu (NO 3 ) 2 ·3H 2 O, 64.1 g, Bi (NO 3 ) 3 ·5H 2 O, 9.2 g CsNO 3 , 3.3 grams of KOH was dissolved to make material B.

[0054] Add 18.7 g NH to 50 g water 4 VO 3 and 18 grams of urea-forming material C.

[0055] Material B and C were successively added dropwise to material A under rapid stirring to form a catalyst slurry, which was stirred and aged at 80 °C for 2 hours, the slurry was dried at 120 °C to remove most of the water, and then extruded to obtain φ3. 5x3.5mm cylindrical object, and then calcined at high temperature to obtain the finished catalyst,...

Embodiment 2~11

[0058] The catalyst was prepared according to the steps of Example 1, except that the catalyst preparation conditions were changed, and the type and amount of pore-forming compounds were added. The specific results are listed in Table 1. Under the same evaluation conditions as Example 1, the reaction evaluation results are listed in Table 2. .

[0059] Table 1

[0060]

[0061] Table 2

[0062] Acrylic acid yield (%) Acrylic acid selectivity (%) Acrolein conversion rate (%) Comparative example 1 95.8 98.0 97.8 Comparative example 2 96.4 98.3 98.1 Example 1 97.4 98.9 98.5 Example 2 97.3 98.7 98.6 Example 3 98.8 99.3 99.5 Example 4 97.6 99.1 98.5 Example 5 95.6 97.0 98.6 Example 6 98.7 99.1 99.6 Example 7 96.6 98.2 98.4 Example 8 97.7 98.7 99.0 Example 9 97.3 98.8 98.5 Example 10 96.5 99.1 97.4 Example 11 98.2 98.9 99.3

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PUM

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Abstract

The invention relates to an acrolein oxidation to acrylic acid catalyst, a preparation method and an application of the catalyst, which mainly solve the problems of lower selectivity and yield of acrylic acid in the prior art. The problems are better solved by adopting the technical scheme that the catalyst takes at least one of SiO2, Al2O3 or TiO2 as a carrier and comprises an active component expressed by the following general formula: Mo12VaCuXcYdZeOx, wherein X is at least one of W, Cr, Sn or Nb, Y is at least one of Fe, Bi, Co, Ni, Sb, Ce, La, Zr or Sr, and Z is at least one of alkali metal or alkaline-earth metal, and the catalyst can be used for industrial production of acrylic acid through acrolein oxidation.

Description

technical field [0001] The invention relates to a catalyst for preparing acrylic acid by oxidation of acrolein, a preparation method and use thereof. Background technique [0002] The selective oxidation of olefins to prepare α, β unsaturated aldehydes and unsaturated acids is an important chemical process, in which the production of acrylic acid from acrolein uses a catalyst whose active components contain Mo and V. The improvement of the catalyst is mainly carried out in terms of the activity, selectivity and stability of the catalyst, such as adding transition metals to the active components to improve the activity and increase the yield of the product; adding rare earth elements to improve the redox ability and improve the stability of the catalyst ; Add Fe, Co, Ni and other elements to inhibit the sublimation of Mo, stabilize the active components of the catalyst, and improve the service life of the catalyst. [0003] There have been many patent reports on the selectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J23/887C07C57/055C07C51/25
Inventor 缪晓春杨斌姚全明汪国军
Owner CHINA PETROLEUM & CHEM CORP
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