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Low-temperature selective oxidation catalyst for converting acraldehyde into acrylic acid and application thereof

A technology of selective oxidation and acrolein, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, organic compound preparation, etc., can solve the problem of catalyst deactivation and achieve the ability to resist overheating Strong, mild and stable reaction, wide operating window effect

Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sb 2 o 3 Oxygen overflow is often considered to increase the yield by adding it, but it has not attracted attention to the fact that its addition also makes the catalyst more likely to be deactivated due to overtemperature

Method used

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  • Low-temperature selective oxidation catalyst for converting acraldehyde into acrylic acid and application thereof
  • Low-temperature selective oxidation catalyst for converting acraldehyde into acrylic acid and application thereof
  • Low-temperature selective oxidation catalyst for converting acraldehyde into acrylic acid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: preparation of composite oxide

[0027] In a 20L five-neck flask, put 10L of distilled water, then put a certain amount of copper nitrate, nickel nitrate, ammonium metavanadate, ammonium molybdate, strontium nitrate, and magnesium nitrate into it and stir to form a slurry state, and then the mixed solution is dried by pumping it into a spray dryer, the inlet temperature of the spray dryer is 200°C, and the outlet is not lower than 80°C. The obtained dry powder was ground in a ball mill for 2 hours to obtain a fine powder, shaped on an extruder, and then calcined at 320° C. for 6 hours. The active component is Mo 12 V 3 Nb 0.5 Cu 0.4 Ni 0.8 Sb 48 Mg 0.1 o x , labeled Catalyst 1 # .

Embodiment 2

[0028] Embodiment 2: preparation of composite oxide

[0029] Other is with embodiment 1, makes Mo 12 V 3 Nb 0.5 Cu 0.4 Ni 0.8 Sb 120 Mg 0.1 o x , labeled Catalyst 2 # .

Embodiment 3

[0030] Embodiment 3: preparation of composite oxide

[0031]Other is with embodiment 1, makes Mo 12 V 3 Nb 0.5 Cu 0.4 Ni 0.8 Sb 240 Mg 0.1 o x , labeled Catalyst 3 # .

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PUM

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Abstract

The present invention discloses a low-temperature selective oxidation catalyst for converting acraldehyde into acrylic acid and an application thereof The catalyst is supported nano-Au supported on composite oxide, and reaction materials are a vapour phase propenal material, nitrogen gas and an oxidant hydrogen peroxide, and the reaction is performed at a lower reaction temperature of 160-220 DEG C. The low-temperature selective oxidation catalyst has beneficial effects that the reaction is mild and stable, an operation window is wide, the reaction can be performed at a temperature of 160-220 DEG C which is much lower than a reaction temperature of 240-300 DEG C in prior art; and under the reaction condition, temperature-runaway-resistance is high.

Description

technical field [0001] The invention relates to a low-temperature selective oxidation catalyst for converting acrolein into acrylic acid and its application, in particular to a catalyst using H 2 o 2 To enhance the oxidant, use high Sb 2 o 3 Content-supported nano-Au solid catalyst technology. Background technique [0002] Acrylic acid is one of the important derivatives of propylene, and its esterification products are widely used in coatings, superabsorbent resins, flocculants and washing aids, etc. There are three existing acrylic acid processes, that is, the petroleum route that has been used industrially for more than 40 years, such as the selective oxidation of propylene, the route of low-carbon alkanes, namely the selective oxidation of propane, and the route of biomass glycerol. [0003] The existing industrial acrylate process includes three steps: 1) two-step oxidation of acrolein to acrylic acid by propylene oxidation, using Mo-Bi catalyst, and the reaction te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/887C07C51/285C07C51/235C07C57/055
Inventor 王育刘小波戴伟马天石彭晖刘海江
Owner CHINA PETROLEUM & CHEM CORP
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