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Unsaturated aldehyde catalyst prepared by oxidation method and preparation method thereof

A catalyst and unsaturated technology, used in the oxidation of carboxylic acids, chemical instruments and methods, oxidation of carbonyl compounds, etc., can solve the problems of low yield of target products, low selectivity of target products, etc., and achieve the effect of improving reaction performance

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is that existing catalysts have the problems of low target product selectivity and low target product yield, and a new catalyst for oxidizing propylene and isobutene to produce unsaturated aldehydes is provided

Method used

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  • Unsaturated aldehyde catalyst prepared by oxidation method and preparation method thereof
  • Unsaturated aldehyde catalyst prepared by oxidation method and preparation method thereof
  • Unsaturated aldehyde catalyst prepared by oxidation method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 110 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of warm water at 70° C., stirred to make it completely dissolved, and 104.3 grams of 40% (wt.) silica sol and 41.7 grams of 20% aluminum sol were added to make material A.

[0052]43.7 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 30.2 g of Bi(NO 3 ) 3 ·5H 2 O, 54.5 g Co(NO 3 ) 2 ·6H 2 O, 49.7 g Ni(NO 3 ) 2 ·6H 2 O, 9.2 g Mn(NO 3 ) 2 solution (50%), 2.2 grams of La(NO 3 ) 3 ·3H 2 O is stirred and dissolved to make material B.

[0053] Add 0.32 g KNO to 10 g water 3 and 0.61 g CsNO 3 After dissolution it was added to feed B to form feed C.

[0054] Add material C dropwise to material A under rapid stirring to form a catalyst slurry, add 6 grams of urea, and stir and age at 80°C for 2 hours, dry the slurry at 120°C to remove most of the water, and extrude to obtain The cylindrical object is then calcined at a high temperature to obtain a finished c...

Embodiment 2～10

[0056] The catalyst was prepared according to the steps of Example 1, except that the preparation conditions of the catalyst and the type and amount of the pore-forming compound were changed. The specific results are listed in Table 1. Under the same evaluation conditions, the reaction results are listed in Table 2.

[0057] Table 1 Catalyst composition and preparation conditions

[0058]

[0059] Table 2 Catalyst evaluation results

[0060] Acrolein + acrylic acid yield (%)

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Abstract

The invention relates to an alpha-beta unsaturated aldehyde catalyst prepared by an olefin oxidation method and a preparation method thereof. The problems of low selectivity and low yield of a target product in the prior art are mainly solved. The problems are well solved according to the technical scheme that: an active ingredient shown as the general formula Mo12BiaFebNicXdYeZfOx is adopted, wherein X is selected from at least one of Mg, Co, Ca, Be, Cu, Zn, Pb and Mn; Y is selected from at least one of K, Rb, Na, Li, Tl and Cs; Z is at least one of La, Ce and Sm; and a pore forming compoundis added in the preparation process of the catalyst. The catalyst can be used in the field for industrially producing acrylic aldehyde and methyl acrylic aldehyde by oxidizing propylene and isobutene.

Description

technical field [0001] The invention relates to a catalyst for preparing unsaturated aldehyde by an oxidation method and a preparation method thereof, in particular to a catalyst for preparing acrolein and methacrolein by oxidation of propylene and isobutene and a preparation method thereof. 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 th...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/887C07C27/10C07C47/22C07C45/28C07C57/04C07C51/16
Inventor 缪晓春郑育元杨斌汪国军
Owner CHINA PETROLEUM & CHEM CORP
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