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: 2013-06-19
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 3g γ-Al 2 o 3 Activated alumina particles, ground to less than 250 mesh, powder bulk density of 0.835g / ml. Taking by weighing concentration is the manganese nitrate solution 30g 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 form a solution having a component concentration of 0.2 wt % (mass percentage) in terms of metal. Add the prepared transition metal salt solution to the γ-Al by volume excess ratio of 1.5 times 2 o 3 After immersing for 2 hours, filter to remove excess liquid, dry in a blast drying oven at 110°C for 4 hours, then move into a vacuum drying oven and dry at 110°C for 6 hours. In a muffle furnace, it is first calcined at 450°C for 2h, and then calcined at 600°C for 3h. Co...

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 prepared 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 Add to these three solutions respectively, the liquid volume excess ratio is 1.5, filter after impregnating for 2 hours, dry in a blast drying oven at 110°C for 4 hours, then move into a vacuum drying oven and dry at 110°C for 6 hours. In a muffle furnace, it was fired at 450°C for 2 hours, and then fired at 600°C for 3 hours. Cool naturally to room temperature.

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

example 3

[0041] Weigh 3g TiO 2 (Anatase) is ground into powder particles, and a certain amount of deionized water is used to dilute the 50% manganese nitrate solution to prepare solutions with component weight concentrations of 0.2%, 5.5%, and 16.5% in terms of metal Mn. TiO 2 Add to these 3 solutions respectively, the liquid volume excess ratio is 0.5, filter after impregnation for 2 hours, dry in a blast drying oven at 110°C for 4 hours, then move into a vacuum drying oven and dry at 110°C for 6 hours. Calcined at 650°C for 20h in a muffle furnace. Cool naturally to room temperature.

[0042] Take 3 parts of mixed solutions of chloroplatinic acid and palladium chloride prepared with a weight concentration of 0.25% according to the metal component respectively, the weight ratio of platinum to palladium is 1: 1, and the 3 parts of carriers prepared above are respectively added in equal volumes After dipping into these three parts of Pt-Pd mixed solution for 2 hours, move it into a v...

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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 matter in waste gas and a preparation method thereof, in particular to a catalyst for catalytic oxidation of methyl acetate in organic waste gas and a preparation method thereof. Background technique [0002] In petroleum refining and chemical industries, as well as electronics, printing, coatings, shoemaking, enameled wire processing, food and feed processing and other industries, the problem of organic waste gas emissions is particularly prominent. The discharge of organic waste gas has seriously polluted the atmosphere and caused great harm to the human body, which has aroused widespread concern. [0003] The harm of ester substances to the human body cannot be underestimated. For example, methyl acetate has anesthesia and stimulation effects on the human body. Exposure to the vapor of this product can cause eye burning, tearing, progressive dyspnea, headache, dizzines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89
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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