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Catalyst for the synthesis of methacrolein and methacrylic acid

A technology of methacrylic acid and methacrolein, which is applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, and the preparation of organic compounds, and can solve the problems of low catalyst activity and selectivity

Active Publication Date: 2016-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 advantages of high activity and high selectivity to methacrolein and methacrylic acid

Method used

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  • Catalyst for the synthesis of methacrolein and methacrylic acid
  • Catalyst for the synthesis of methacrolein and methacrylic acid
  • Catalyst for the synthesis of methacrolein and methacrylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of hot water at 70°C, stirred to make it completely dissolved, and 63.2 grams of silica sol with a concentration of 40wt% was added to prepare material A.

[0038] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 34.3 g of Bi(NO 3 ) 3 ·5H 2 O, 41.2 g Co(NO 3 ) 2 ·6H 2 O, 25.1 grams of concentration of 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 , 2.95 grams of Yb (NO 3 ) 3 ·5H 2 O and 3.92 g Ce(NO 3 ) 3 Material B was made after stirring and dissolving.

[0039] Add solution B to solution A under stirring to form a catalyst slurry, add ammonia water to adjust the pH to 7, and stir and age at 80°C for 2 hours, evaporate the slurry at 100°C to a solid content of 80wt%, and extrude. Obtain a cylindrical object with a diameter of 3.5x3.5 mm, and then calcine at a high tempe...

Embodiment 2

[0041] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 g of hot water at 70 °C, stirred to dissolve it completely, and 78.9 g of silica sol with a concentration of 40 wt%, 47.7 g of aluminum sol with a concentration of 20 wt% and 8.24 g of NH 4 VO 3 Material A is made.

[0042] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 34.3 g of Bi(NO 3 ) 3 ·5H 2 O, 41.2 g Co(NO3 ) 2 ·6H 2 O, 0.7 g Zn(NO 3 ) 2 ·6H 2 O. 0.32 g KNO 3 , 0.46 g CsNO 3 , 2.95 grams of Yb (NO 3 ) 3 ·5H 2 O and 1.02 g Ce(NO 3 ) 3 Material B was made after stirring and dissolving.

[0043] Add solution B to solution A under stirring to form a catalyst slurry, add ammonia water to adjust the pH value to 9, and stir and age at 50°C for 2 hours, evaporate the slurry at 100°C to a solid content of 80wt%, and extrude. Obtain a cylindrical object of φ3.5x3.5mm, and then calcine at a high temperature to obtain a finished catalyst. The calcination...

Embodiment 3

[0045] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of hot water at 70°C, stirred to dissolve it completely, and 77.2 grams of silica sol with a concentration of 40 wt% was added to prepare material A.

[0046] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 150 g of 70°C hot water, stirred and dissolved, and then 34.3 g of Bi(NO 3 ) 3 ·5H 2 O, 41.2 g Co(NO 3 ) 2 ·6H 2 O, 0.47 g Cr 2 o 3 , 0.32 g KNO 3 , 0.46 g CsNO 3 , 2.95 grams of Yb (NO 3 ) 3 ·5H 2 O and 1.02 g Ce(NO 3 ) 3 Material B was made after stirring and dissolving.

[0047] Add solution B to solution A under stirring to form a catalyst slurry, add ammonia water to adjust the pH value to 9, and stir and age at 60°C for 2 hours, evaporate the slurry at 100°C to a solid content of 80wt%, and extrude. Obtain a cylindrical object of φ3.5x3.5mm, and then calcine at a high temperature to obtain a finished catalyst. The calcination temperature is 490° C., and the calcination time is 8 hours. The ca...

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Abstract

The invention relates to a catalyst for synthesizing methylacrolein and methacrylic acid, a preparation method of the catalyst, and a synthetic method for methylacrolein and methacrylic acid, and mainly solves the problems that the catalyst applied to selective oxidation reaction of isobutene is low in activity and the selectivity is low in the prior art. According to the technical scheme, the active compositions of the catalyst comprise both Ce and Yb, and thus the above problems are relatively well solved, and the catalyst is applicable to industrial production of methylacrolein and methacrylic acid.

Description

technical field [0001] The invention relates to a catalyst for synthesizing methacrolein and methacrylic acid, a preparation method thereof and a synthesis method of 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 successive...

Claims

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Application Information

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Patent Type & Authority Patents(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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