Methacrylaldehyde catalyst

A methacrolein and catalyst technology, which is applied in the direction of physical/chemical process catalysts, carbon-based compound preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low yield of methacrolein

Pending Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is that there is a low yield of methacrolein in the existing isobutene or tert-butanol oxidation reaction to synthesize methacrolein. Catalyst for Selective Oxidation Synthesis of Methacrolein

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Catalyst preparation:

[0044] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 g of water at 70° C., stirred to dissolve it completely, and 89.4 g of 40 wt % silica sol and 35.8 g of 20 wt % aluminum sol were added to obtain mixture I.

[0045] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 150 grams of water at 70°C, stirred and dissolved, and then 34.3 grams of Bi(NO 3 ) 3 ·5H 2 O, 41.2 g Co(NO 3 ) 2 ·6H 2 O, 2.1 g Er(NO 3 ) 3 ·3H 2 O, 0.7 g Zn(NO 3 ) 2 ·6H 2 O, 0.27 g CsNO 3 and 19.1 g (NH 4 ) 6 h 5 [H 2 (WO 4 ) 6 ] After stirring and dissolving, solution II was obtained.

[0046] Solution II was added to mixture I with stirring to obtain catalyst slurry III.

[0047] Adjust the pH value of the slurry III to pH 4 with commercially available ammonia water (concentration: 25w%) to obtain slurry IV.

[0048] Slurry IV was dried at 120° C. to obtain catalyst precursor V.

[0049] Mix 0.4 grams of antimony trioxide and the above-mentioned catalyst p...

Embodiment 2

[0053] Catalyst preparation:

[0054] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 g of water at 70° C., stirred to dissolve it completely, and 89.4 g of 40 wt % silica sol and 35.8 g of 20 wt % aluminum sol were added to obtain mixture I.

[0055] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 150 grams of water at 70°C, stirred and dissolved, and then 34.3 grams of Bi(NO 3 ) 3 ·5H 2 O, 41.2 g Co(NO 3 ) 2 ·6H 2 O, 2.1 g Er(NO 3 ) 3 ·3H 2 O, 0.7 g Zn(NO 3 ) 2 ·6H 2 O, 0.27 g CsNO 3 , 19.1 g (NH 4 ) 6 h 5 [H 2 (WO 4 ) 6 ] and 0.4 g of antimony trioxide were stirred and dissolved to obtain solution II.

[0056] Solution II was added to mixture I with stirring to obtain catalyst slurry III.

[0057] Adjust the pH value of the slurry III to pH 4 with commercially available ammonia water (concentration: 25w%) to obtain slurry IV.

[0058] Slurry IV was dried at 120° C. to obtain catalyst precursor V.

[0059] Mix the above catalyst precursor V with water a...

Embodiment 3

[0063] Catalyst preparation:

[0064] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 g of water at 70° C., stirred to dissolve it completely, and 89.4 g of 40 wt % silica sol and 35.8 g of 20 wt % aluminum sol were added to obtain mixture I.

[0065] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 150 grams of water at 70°C, stirred and dissolved, and then 34.3 grams of Bi(NO 3 ) 3 ·5H 2 O, 41.2 g Co(NO 3 ) 2 ·6H 2 O, 2.1 g Er(NO 3 ) 3 ·3H 2 O, 0.7 g Zn(NO 3 ) 2 ·6H 2 O, 0.27 g CsNO 3 and 19.1 g (NH 4 ) 6 h 5 [H 2 (WO 4 ) 6 ] After stirring and dissolving, solution II was obtained.

[0066] Under stirring, solution II was added to mixture I, and 0.4 g of antimony trioxide was added to obtain catalyst slurry III.

[0067] Adjust the pH value of the slurry III to pH 4 with commercially available ammonia water (concentration: 25w%) to obtain slurry IV.

[0068] Slurry IV was dried at 120° C. to obtain catalyst precursor V.

[0069] Mix the above catalyst pr...

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Abstract

The invention relates to a catalyst for synthesis of methacrylaldehyde by oxidation of isobutene or tert-butyl alcohol, and mainly solves the technical problems of low catalyst activity and low yield in the prior art. According to a technical scheme, the catalyst for synthesis of methacrylaldehyde by selective oxidation of isobutene or tert-butyl alcohol comprises a carrier and an active component, the carrier is selected from silica and / or alumina, and the active component has the following formula: Mo12BiaFebCocSbdXeYfZgOh, wherein X is selected from at least one of W, V, Ni, Cr, Mn, Nb Er, or Re; Y is selected from at least one of Sn, Sr, Zn, Ti and Zr; and Z is selected from at least one of K, Rb, Na, Li, Tl or Cs. The methacrylaldehyde catalyst well solves the problems, and can be used for the industrial production of methacrylaldehyde.

Description

technical field [0001] The invention relates to a catalyst for synthesizing methacrolein by oxidation of isobutene or tert-butanol, a preparation method thereof, and a synthesis method of methacrolein. Background technique [0002] Methyl methacrylate (MMA) is an important organic chemical raw material and chemical product, mainly used in the production of polymethyl methacrylate (plexiglass, PMMA), polyvinyl chloride additive ACR and as the first acrylic fiber production Dimonomers can also be used in the production of coatings, adhesives, lubricants, textile dyes, etc. [0003] The traditional production method of MMA is the acetone cyanohydrin method using acetone and hydrocyanic acid as raw materials, but this process uses highly toxic and highly corrosive hydrocyanic acid and sulfuric acid, and a large amount of ammonium bisulfate is produced as a by-product, so the requirements for production equipment are harsh and greater pressure on the environment. After the 1980...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/888B01J23/887C07C47/22C07C45/35
Inventor 李静霞姜家乐吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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