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Integral type ruthenium catalyst used for purifying PTA oxidized tail gas as well as preparation method and application of integral type ruthenium catalyst

A ruthenium catalyst, tail gas oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve high halogenated by-products, poor toxicity resistance, and Halogen poisoning and other problems, to achieve the effect of high activity, low cost, stable catalytic performance

Active Publication Date: 2015-12-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a monolithic ruthenium catalyst for PTA oxidation tail gas purification in view of the problems of high cost, poor toxicity resistance and high halogenated by-products currently used for industrial waste gas treatment. The catalyst has the advantages of relatively low cost, high catalytic activity, resistance to halogen poisoning, and less high-halogenated by-products.

Method used

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  • Integral type ruthenium catalyst used for purifying PTA oxidized tail gas as well as preparation method and application of integral type ruthenium catalyst
  • Integral type ruthenium catalyst used for purifying PTA oxidized tail gas as well as preparation method and application of integral type ruthenium catalyst

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Effect test

Embodiment 1

[0045] A catalyst for catalyzing and oxidizing PTA waste gas is mainly divided into two processes: powder catalyst preparation and integral catalyst preparation. Wherein, the powder catalyst includes an active component, a first carrier and a second carrier, the active component is ruthenium, and the first carrier is rutile phase TiO 2 , the second carrier is ZrO 2 , based on 100 wt% of the mass of the powder catalyst, the mass percentage of ruthenium in the active component of the powder catalyst is 1 wt%, and the mass ratio of the first carrier to the second carrier is 5:1. In the monolithic catalyst, the catalyst coating amount was 160 g / L.

[0046] Above-mentioned catalyst preparation comprises the steps:

[0047] (1) The rutile phase TiO 2 Add it into the aqueous solution of zirconium nitrate and stir it at the same time to obtain a mixed slurry, then let it stand for 1 hour, after the impregnation is sufficient, place it in an oven at 110°C to remove water for the fir...

Embodiment 2

[0052] Except that the mass percentage of the active component ruthenium element in the catalyst is 0.2wt.%, the rest is the same as that of Example 1.

[0053] The complete oxidation temperatures of the catalyst p-bromomethane, acetic acid, methyl acetate, and p-xylene are 320°C, 235°C, 240°C, and 260°C, respectively. 2 Selectivity ≥ 99%.

Embodiment 3

[0055] Except that the mass percentage of the active component ruthenium element in the catalyst is 2wt.%, the rest is the same as that of Example 1.

[0056] The complete oxidation temperatures of the catalyst p-bromomethane, acetic acid, methyl acetate, and p-xylene are 235°C, 170°C, 190°C, and 220°C, respectively. 2 Selectivity ≥ 99%.

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Abstract

The invention relates to an integral type ruthenium catalyst used for purifying PTA oxidized tail gas as well as a preparation method and application of the integral type ruthenium catalyst. The catalyst is mainly obtained by forming a powder type catalyst. The powder type catalyst comprises an active component, a first carrier and a second carrier, wherein the active component is ruthenium and / or an oxide of ruthenium; the first carrier is rutile phase TiO2 and the second carrier is any one of ZrO2, Al2O3, SiO2 and ZnO; by taking the mass of the powder type catalyst as 100wt%, the mass percent of the ruthenium element of the active component in the powder type catalyst is smaller than or equal to 2wt%. The catalyst has higher activity and has a stable catalytic performance on bromo-hydrocarbon; no hyper-bromo-compound byproducts are generated; for common components in the PTA tail gas, the complete oxidization temperature of the catalyst is 170-230 DEG C and the CO2 selectivity of a final reaction product is more than or equal to 99%; the integral type ruthenium catalyst can be widely applied to catalytic oxidization of industrial organic waste gas including the PTA oxidized tail gas and the like.

Description

technical field [0001] The invention relates to a monolithic ruthenium catalyst for purification of PTA oxidation tail gas, a preparation method and its use, and belongs to the technical field of environmental protection. The catalyst uses ruthenium and / or ruthenium oxide as the main active component, which can efficiently remove Remove VOCs in PTA oxidation tail gas. Background technique [0002] There are many kinds of volatile organic compounds (Volatile Organic Compounds, referred to as VOCs), common ones include hydrocarbons, oxygen-containing organic compounds, nitrogen-containing, sulfur, halogen and phosphorus-containing organic compounds, etc., which are common pollutants in petrochemical, pharmaceutical, chemical, packaging and printing industries . The hazards of VOCs are particularly serious. Long-term exposure to VOCs-polluted environments can cause chronic poisoning and damage the liver and nervous system. [0003] Purified Terephthalic Acid (PTA) oxidation w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/60B01D53/86B01D53/72B01D53/70B01D53/62
Inventor 朱廷钰刘霄龙王健曾俊淋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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