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Catalytic oxidation catalyst for methyl acetate in organic waste gas and preparation method thereof

A technology for catalytic oxidation of methyl acetate, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor stability, impact, low complete oxidation activity, etc. problems, to achieve the effect of good stability, simple preparation and high use value

Active Publication Date: 2011-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] At present, there is no relevant report on the catalyst used for catalytic oxidation to treat PTA exhaust gas. However, the existing catalysts used in industry have low complete oxidation activity to methyl acetate, are easily affected by methyl bromide in exhaust gas, and have poor stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Weigh 3gγ-Al 2 O 3 Activated alumina particles, ground to less than 250 mesh, powder bulk density is 0.835g / ml. Weigh 30g of manganese nitrate solution with a concentration of 50wt% (mass percentage), and Ce (NO 3 ) 3 ·6H 2 O, La (NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 3 3H2O, ammonium metavanadate, ammonium tungstate, Fe(NO 3 ) 3 · 9H2O, Co(NO 3 ) 3 ·6H 2 O, Ni (NO 3 ) 3 ·3H 2 O, Cr (NO 3 ) 3 ·9H 2 15 g of metal salts such as O were diluted or dissolved with deionized water, respectively, to prepare a solution with a component concentration of 0.2 wt % (mass percentage) in terms of metal. The prepared transition metal salt solutions were added to γ-Al in an excess volume ratio of 1.5 times. 2 O 3 After immersing for 2 hours, filtered to remove excess liquid, dried in a blast drying oven at 110 °C for 4 hours, and then transferred to a vacuum drying oven for 6 hours at 110 °C. In a muffle furnace, calcined at 450 °C for 2 h, and then calcined at 600 °C for 3 ...

example 2

[0038] Weigh 3g γ-Al 2 O 3 Grind into powder, Ce(NO 3 ) 3 ·6H 2 O was added to 50% manganese nitrate solution, dissolved with a certain amount of deionized water, and made into a solution with a weight concentration of 0.1% in terms of single metal components, wherein the weight ratio of Ce and Mn was 1:1. According to the same steps as above, a solution with a weight ratio of La to Mn of 1:1, or a weight ratio of Ce to La of 1:1 was obtained, respectively. Three parts of γ-Al 2 O 3 They were added to the three solutions respectively, with an excess liquid volume ratio of 1.5, immersed for 2 hours, filtered, dried at 110°C for 4 hours in a blast drying oven, and then transferred to a vacuum drying oven for 6 hours at 110°C. In a muffle furnace, it was first calcined at 450 °C for 2 h, and then calcined at 600 °C for 3 h. Cool naturally to room temperature.

[0039] Get the chloroplatinic acid and the palladium chloride solution that are respectively 0.25% prepared by t...

example 3

[0041] Weigh 3g TiO 2 (anatase) is ground into powder particles, and a 50% manganese nitrate solution is diluted with a certain amount of deionized water to prepare solutions with a weight concentration of 0.2%, 5.5%, and 16.5% in terms of metal Mn. the TiO 2 They were added to the three solutions respectively, the liquid volume excess ratio was 0.5, immersed for 2 hours, filtered, dried at 110°C for 4 hours in a blast drying oven, and then transferred to a vacuum drying oven for 6 hours at 110°C. It was calcined at 650°C for 20h in a muffle furnace. Cool naturally to room temperature.

[0042] Take 3 parts of chloroplatinic acid and palladium chloride mixed solution that are respectively 0.25% prepared by weight concentration of metal components, the weight ratio of platinum and palladium is 1: 1, and the above-mentioned 3 parts of carriers are added in equal volume respectively. Into the three parts of Pt-Pd mixed solution, after immersion for 2 hours, it was transferred ...

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Abstract

The invention discloses a catalytic oxidation catalyst for methyl acetate in organic waste gas and a preparation method thereof. The catalyst is a supported noble metal alloy catalyst, wherein the noble metal alloy is an arbitrary metal combination of two or more of Pd, Pt, Rh, Au and Ag; the vector is activated alumina and / or titanium dioxide, as well as at least one transition metal oxide whichcomprises metal oxide of manganese, cerium, nickel, lanthanum, copper, vanadium, tungsten, iron, cobalt or chrome; and the weight ratio of the noble metal alloy to the vector is (1:2,000)-(1:5). The catalyst provided by the invention can be used for treating organic waste gas containing methyl acetate, especially for treating waste gas of a PTA (purified terephthalic acid) device, by a catalytic oxidation method; and the catalyst has the advantages of simple preparation, high catalytic oxidation activity, good stability, excellent halogenated hydrocarbon poisoning resistance and high practical application value.

Description

technical field [0001] The invention relates to a catalyst for catalytic oxidation treatment of organic substances in waste gas and a preparation method thereof, in particular to a catalytic oxidation catalyst of methyl acetate in organic waste gas and a preparation method thereof. Background technique [0002] In petroleum refining and chemical industries, as well as in electronics, printing, coatings, shoemaking, enameled wire processing and food and feed processing industries, the problem of organic waste gas emissions is particularly prominent. The discharge of organic waste gas seriously pollutes the atmospheric environment and causes great harm to the human body, which has attracted widespread attention. [0003] The harm of esters to the human body should not be underestimated. For example, methyl acetate has anesthetic and stimulating effects on the human body. Contact with the vapor of this product can cause eye burning pain, tearing, progressive dyspnea, headache,...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/656B01J23/652B01J23/648B01J23/68B01J23/66B01D53/86B01D53/72
Inventor 李平赫崇衡刘建新刘波隋志军陈韶辉朱连利朱伟陈春波王寅
Owner CHINA PETROLEUM & CHEM CORP
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