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Acrolein catalyst and preparation method thereof

A technology of catalyst and acrolein, which is applied in the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of the decline of acrolein yield in the conversion rate of propylene, and achieve the purpose of delaying performance decline and good technical effects Effect

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

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problem that the conversion rate of propylene and the yield of acrolein decrease in the long-term operation of the catalyst used in the existing acrolein preparation method, and a new method for preparing acrolein catalyst is provided. The prepared catalyst has the advantages of high propylene conversion rate, high acrolein yield, good selectivity and good catalyst stability

Method used

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  • Acrolein catalyst and preparation method thereof
  • Acrolein catalyst and preparation method thereof
  • Acrolein catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O (i.e. ammonium heptamolybdate) was added to 1000 grams of warm water at 70°C, stirred to dissolve it completely, and 2.88 grams of KNO 3 and 5.49 grams of CsNO 3 To obtain material 1, add 573.9 grams of silica sol with a concentration of 40 wt% to material 1 to prepare material 2.

[0038] 396.9 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 229.0 g of Bi(NO 3 ) 3 ·5H 2 O, 480.8 g Co(NO 3 ) 2 ·6H 2 O, 452.1 g Ni(NO 3 ) 2 ·6H 2 O, 150.5 g of 50 wt % Mn(NO 3 ) 2 Aqueous solution, 19.6 g La(NO 3 ) 3 ·3H 2 O and 41.7 g Sb 2 o 3 Stir to make material 3.

[0039]Add material 3 to material 2 under rapid stirring to form a catalyst slurry, and stir and age at 65°C for 2 hours. The slurry is sprayed and granulated and calcined at 350°C for 2 hours to obtain a powdery catalyst precursor (spray Conditions: air inlet temperature 345°C, air outlet temperature 125°C, atomization dis...

Embodiment 2

[0055] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 1000 grams of warm water at 70°C, stirred to dissolve it completely, and 2.88 grams of KNO was added 3 and 5.49 grams of CsNO 3 To obtain material 1, add 573.9 grams of silica sol with a concentration of 40 wt% to material 1 to prepare material 2.

[0056] 396.9 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 229.0 g of Bi(NO 3 ) 3 ·5H 2 O, 480.8 g Co(NO 3 ) 2 ·6H 2 O, 452.1 g Ni(NO 3 ) 2 ·6H 2 O, 150.5 g of 50 wt % Mn(NO 3 ) 2 Aqueous solution, 19.6 g La(NO 3 ) 3 ·3H 2 O and 41.7 g Sb 2 o 3 Stir to make material 3.

[0057] Add material 3 to material 2 under rapid stirring to form a catalyst slurry, and stir and age at 65°C for 2 hours. The slurry is sprayed and granulated and calcined at 350°C for 2 hours to obtain a powdery catalyst precursor (spray Conditions: air inlet temperature 345°C, air outlet temperature 125°C, atomization disc rotation speed 220...

Embodiment 3

[0060] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 1000 grams of warm water at 70°C, stirred to dissolve it completely, and 2.88 grams of KNO was added 3 and 5.49 grams of CsNO 3 To obtain material 1, add 573.9 grams of silica sol with a concentration of 40 wt% to material 1 to prepare material 2.

[0061] 396.9 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 229.0 g of Bi(NO 3 ) 3 ·5H 2 O, 480.8 g Co(NO 3 ) 2 ·6H 2 O, 452.1 g Ni(NO 3 ) 2 ·6H 2 O, 150.5 g of 50 wt % Mn(NO 3 ) 2 Aqueous solution, 19.6 g La(NO 3 ) 3 ·3H 2 O and 41.7 g Sb 2 o 3 Stir to make material 3.

[0062] Add material 3 to material 2 under rapid stirring to form a catalyst slurry, and stir and age at 65°C for 2 hours. The slurry is sprayed and granulated and calcined at 350°C for 2 hours to obtain a powdery catalyst precursor (spray Conditions: air inlet temperature 345°C, air outlet temperature 125°C, atomization disc rotation speed 220...

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Abstract

The invention relates to an acrolein catalyst and a preparation method thereof, which mainly solve the problem of performance reduction of the catalyst after long-time running in the prior art. With the adoption of the technical scheme that the method comprises the following steps of mixing a powdered catalyst precursor selected from at least one of SiO2 or Al2O3 as a carrier, with an adhesive agent and a molybdenum additive, forming, and finally roasting to obtain the catalyst, wherein the molybdenum additive comprises 50-100 mol% of ammonium heptamolybdate and 0-50 mol% of molybdenum trioxide, the technical problem is better solved, and the method can be used for industrial production of the propylene oxidation to acrolein catalyst.

Description

technical field [0001] The invention relates to an acrolein catalyst 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 the catalyst, etc. [0003] There have been many patent reports on the selective oxidation of olefins: [0004] Chinese patent ZL99106659.6 reduces the formation of organic acids, high boili...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/887C07C47/22C07C45/35
Inventor 杨斌缪晓春奚美珍汪国军
Owner CHINA PETROLEUM & CHEM CORP
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