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Unsaturated aldehyde catalyst produced by an oxidation method and preparation method thereof

A catalyst and unsaturated technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, and preparation of oxygenated compounds by oxidation of hydrocarbons. It can solve the problems of low yield and selectivity, and achieve the effect of improving reaction performance.

Active Publication Date: 2011-05-04
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 yield and selection of the target product acrolein or methacrolein and its corresponding acid in the catalyst used in the prior art for the oxidation of propylene or isobutylene to produce acrolein or methacrolein. To solve the problem of low stability, provide a new catalyst for the oxidation of olefins to unsaturated aldehydes

Method used

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  • Unsaturated aldehyde catalyst produced by an oxidation method and preparation method thereof
  • Unsaturated aldehyde catalyst produced by an oxidation method and preparation method thereof
  • Unsaturated aldehyde catalyst produced by an oxidation method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The catalyst was prepared according to the same process as in the comparative example, except that 5.13 grams of ethylenediamine was added to the catalyst slurry.

Embodiment 2～11

[0053] The catalyst was prepared according to the steps of Example 1, except that the preparation conditions of the catalyst were changed, and the type and amount of the organic amine compound were added. The specific results are listed in Table 1. The results of the catalyst used in the oxidation of propylene to acrolein are listed in Table 2. The catalyst used The results of the oxidation of isobutene to methacrolein are listed in Table 3.

[0054]

[0055] Table 2 Catalyst is used in propylene oxidation reaction result

[0056] Catalyst number

Acrolein + acrylic acid yield (%)

Acrolein + acrylic acid selectivity (%)

Propylene conversion (%)

Comparative example 1

84.8

88.7

95.6

Example 1

89.2

90.3

98.8

Example 2

93.5

94.3

99.1

Example 3

92.8

96.0

96.7

Example 4

88.3

89.6

98.6

Example 5

89.2

91.5

97.5

Example 6

89.6

91....

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Abstract

The invention relates to an unsaturated aldehyde catalyst prepared by oxidizing olefin and a preparation method thereof, and mainly solves the problems of low reaction yield and selectivity of target products unsaturated aldehyde and unsaturated acid in the prior art. The catalyst takes at least one of SiO2 and Al2O3 as a carrier, and contains active ingredients shown as a formula Mo12BiaFebNicXdYeZfQqOx, wherein X is at least one of Mg, Co, Ca, Be, Cu, Zn, Pb and Mn; Y is at least one of Zr, Nb and Ti; Z is at least one of K, Rb, Na, Li, Cr, Tl and Cs; and Q is at least one of La, Ce, Sm andTh. Through the technical scheme, the catalyst and the preparation method thereof well solve the problems and can be used for the industrial production of acrolein or methacrolein prepared by oxidizing propylene or isobutylene.

Description

technical field [0001] The invention relates to a catalyst for producing unsaturated aldehyde by oxidation method and its preparation method, in particular to a catalyst for producing acrolein or methacrolein by oxidation of propylene or isobutene and its preparation method. Background technique [0002] The selective oxidation of olefins to prepare α, β unsaturated aldehydes and unsaturated acids is an important chemical process, and the production of unsaturated aldehydes uses a catalyst containing Mo and Bi as active components. The improvement of the catalyst is mainly carried out in terms of the activity and stability of the catalyst, such as adding transition metals to the active component to increase the activity and increase the yield of the product; adding rare earth elements to improve the redox ability; adding Fe, Co, Ni, etc. Elements to inhibit the sublimation of Mo, stabilize the active components of the catalyst, improve the service life of the catalyst, etc. ...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/887B01J37/02C07C27/14C07C45/35C07C47/22C07C51/25C07C57/05
Inventor 杨斌缪晓春郑育元汪国军吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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