Catalyst of methacrylaldehyde and methacrylic acid, as well as preparation method of catalyst for synthesizing methacrylaldehyde and methacrylic acid

A technology of methacrolein and methacrylic acid, applied in the preparation of carbon-based compounds, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of low catalyst activity and selectivity

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the problem of low catalyst activity and selectivity for the selective oxidation reaction of isobutene in the prior art, and a catalyst for synthesizing methacrolein and methacrylic acid is provided, the catalyst It has the characteristics of good activity and selectivity

Method used

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  • Catalyst of methacrylaldehyde and methacrylic acid, as well as preparation method of catalyst for synthesizing methacrylaldehyde and methacrylic acid
  • Catalyst of methacrylaldehyde and methacrylic acid, as well as preparation method of catalyst for synthesizing methacrylaldehyde and methacrylic acid
  • Catalyst of methacrylaldehyde and methacrylic acid, as well as preparation method of catalyst for synthesizing methacrylaldehyde and methacrylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of water at 70°C, stirred to dissolve it completely, and 63.2 grams of silica sol with a concentration of 40wt% was added to form mixture I.

[0029] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 20 grams of water at 70°C, stirred and dissolved, and then 34.3 grams of Bi(NO 3 ) 3 ·5H2 O, 41.2 g Co(NO 3 ) 2 ·6H 2 O, 25.1 grams concentration is 50wt% Mn(NO 3 ) 2 Aqueous solution, 0.32 g KNO 3 and 0.46 g CsNO 3 , 0.47 g Cr 2 o 3 , 6.1 grams of Zr(NO 3 ) 4 ·5H 2 O was stirred and dissolved to form mixture II.

[0030] Add mixture II to mixture I with stirring, add 18.6 g of Fe after mixing 2 Mo 3 o 12 , add ammonia water, adjust the pH to 7, and stir and mature at 80°C for 2 hours. The slurry is evaporated at 100°C to a solid content of 80wt%, extruded to obtain a cylindrical object of φ3.5x3.5mm, and then roasted at high temperature to obtain For the finished catalyst, the calcination temperature is 4...

Embodiment 2

[0032] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of water at 70°C, stirred to dissolve it completely, and 63.2 grams of silica sol with a concentration of 40wt% was added to form mixture I.

[0033] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 20 grams of 70°C hot water, 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, 25.1 grams concentration is 50wt% Mn(NO 3 ) 2 Aqueous solution, 0.47 g Cr 2 o 3 , 6.1 grams of Zr(NO 3 ) 4 ·5H 2 O. 0.32 g KNO 3、 0.46 g CsNO 3 Mixture II was prepared after stirring to dissolve.

[0034] Add mixture II to mixture I under stirring, mix well and add 18.6 g of MoO 3 , add ammonia water, adjust the pH to 7, and stir and mature at 80°C for 2 hours. The slurry is evaporated at 100°C to a solid content of 80wt%, extruded to obtain a cylindrical object of φ3.5x3.5mm, and then roasted at high temperature to obtain For the finished catalyst, the calcination temperature is 490° ...

Embodiment 3

[0036] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of water at 70°C, stirred to dissolve it completely, and 63.2 grams of silica sol with a concentration of 40wt% was added to form mixture I.

[0037] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 20 grams of 70°C hot water, 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, 25.1 grams concentration is 50wt% Mn(NO 3 ) 2 Aqueous solution, 0.47 g Cr 2 o 3 , 6.1 grams of Zr(NO 3 ) 4 ·5H 2 O. 0.32 g KNO 3 , 0.46 g CsNO 3 Mixture II was prepared after stirring to dissolve.

[0038] Add mixture II to mixture I under stirring, add 18.6 g of Fe after stirring 2 o 3 , add ammonia water, adjust the pH to 7, and stir and mature at 80°C for 2 hours. The slurry is evaporated at 100°C to a solid content of 80wt%, extruded to obtain a cylindrical object of φ3.5x3.5mm, and then roasted at high temperature to obtain For the finished catalyst, the calcination temperature is...

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Abstract

The invention relates to a catalyst for synthesizing methacrylaldehyde and methacrylic acid, as well as a preparation method of the catalyst for synthesizing the methacrylaldehyde and the methacrylic acid, and a synthesis method of the methacrylaldehyde and the methacrylic acid, and mainly solves the problem that the catalyst used for selective oxidation reaction of isobutylene is poor in stability in the prior art. The active components of the catalyst of the methacrylaldehyde and the methacrylic acid have the following general formula: Mo12BiaFebCocXdYeZfOx, wherein X is selected from at least one of W, V, Ni, Cr, Mn, Nb, Re and La; Y is selected from at least one of Sn, Sr, Zn, Ti or Zr; Z is selected from at least one of Na, Li, Tl, K, Cs, Mg or Ca, so that the problem is relatively well solved, and the catalyst can be used for industrial production of the methacrylaldehyde and the methacrylic acid.

Description

technical field [0001] The invention relates to a catalyst for methacrolein and methacrylic acid, a preparation method and a synthesis method for methacrolein and methacrylic acid. Background technique [0002] Methyl methacrylate (MMA) is an organic chemical intermediate mainly used in the production of plexiglass, in addition to the production of coatings, adhesives, lubricants, penetrants and PVC modifiers. The main process used in the production of early MMA is the acetone cyanohydrin method, which has been widely used due to its mature technology and high product yield. However, hydrocyanic acid and sulfuric acid are used in the production process of this process, and a large amount of ammonium cyanide sulfate is produced as a by-product, which causes great pressure on the environment, thus promoting the development and research of a new MMA process. Since the 1980s, companies such as Nippon Catalyst, Mitsubishi Rayon and Asahi Kasei have successively developed a blend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/887C07C27/12C07C47/22C07C45/35C07C57/045C07C51/25
Inventor 李静霞张顺海姜家乐吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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