Synthesis method of methacrylaldehyde

A technology for synthesizing methacrolein and isobutylene, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carbon-based compounds, etc., can solve problems such as low yield of methacrolein, and achieve good technical effects.

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

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is that there is a problem that the yield of methacrolein is low in the existing reaction of isobutene or tert-butanol oxidation to produce methacrolein, and a new method for producing methyl acrolein by oxidation of isobutene or tert-butanol is provided. acrolein method

Method used

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  • Synthesis method of methacrylaldehyde
  • Synthesis method of methacrylaldehyde
  • Synthesis method of methacrylaldehyde

Examples

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Effect test

Embodiment 1

[0033] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of warm water at 70°C, stirred to dissolve it completely, and 89.4 grams of 40w% silica sol and 35.8 grams of 20w% aluminum sol were added to make material I.

[0034] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 20 grams of hot 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, 6.1 g Ce(NO 3 ) 3 ·6H 2 O, 0.7 g Zn(NO 3 ) 2 ·6H 2 O, 0.2 g CsOH and 19.1 g (NH 4 ) 6 h 5 [H 2 (WO 4 ) 6 ] stirring and dissolving to make material II.

[0035]Add material II to material II to form a catalyst slurry, and stir and age at 80°C for 2 hours, then dry and calcine at a high temperature to obtain a finished catalyst at a calcination temperature of 450°C. The catalyst composition and preparation conditions are listed in Table 1. The molar ratio of isobutene or tert-butanol to oxygen is 1:2; the reaction temperature is 350°C; the reaction pressure is 0.1M...

Embodiment 2

[0037] 100 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 100 grams of warm water at 70°C, stirred to dissolve it completely, and 78.9 grams of 40w% silica sol and 47.7 grams of 20w% aluminum sol were added to make material I.

[0038] 38.5 g Fe(NO 3 ) 3 9H 2 O was added to 20 grams of hot 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, 6.1 g Ce(NO 3 ) 3 ·6H 2 O, 0.7 g Zn(NO 3 ) 2 ·6H 2 O, 0.5 g CH 3 COOCs and 8.24 g NH 4 VO 3 After stirring and dissolving, material II was produced.

[0039] Add material II to material I to form a catalyst slurry, and stir and age at 80°C for 2 hours, then dry and calcine at a high temperature to obtain a finished catalyst at a calcination temperature of 450°C. The catalyst composition and preparation conditions are listed in Table 1. The molar ratio of isobutene or tert-butanol to oxygen is 1:2; the reaction temperature is 350°C; the reaction pressure is 0.1MPa; th...

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Abstract

The invention relates to a method for oxidation of isobutene or tert-butyl alcohol to prepare methacrylaldehyde, and mainly solves the problems of low activity and low yield of methacrylaldehyde and methacrylic acid in the prior art. According to a technical scheme, isobutene or tert-butyl alcohol is employed for selective oxidation to synthesize methacrylaldehyde, isobutene or tert-butyl alcohol and oxygen are adopted as the raw materials, water is taken as the reaction diluent, and the raw materials and a catalyst contact to generate methacrylaldehyde. Specifically, the catalyst comprises a carrier and an active ingredient, the active ingredient has the following general formula Mo12BiaFebCocCedCseXfYgOh, wherein X is at least one of W, V, Ni, Cr, Mn, Nb or Re, and Y is selected from at least one of Sn, Sr, Zn, Ti or Zr. The method well solves the problem, and can be applied to the industrial production of methacrylaldehyde.

Description

technical field [0001] The invention relates to a method for preparing methacrolein by oxidation of isobutene or tert-butanol. 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 1980s, Nippon Shokubai, Mitsubishi Rayon and Asahi Kasei successively developed...

Claims

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Application Information

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IPC IPC(8): C07C47/22C07C45/35C07C45/38B01J23/888B01J23/889B01J23/887
Inventor 李静霞张顺海吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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