Vanadium-free rare-earth-based titanium-tungsten powder and preparation method therefor

A rare earth-based, titanium-tungsten powder technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Improve dispersion, chemical poisoning of catalysts, etc., to achieve the effect of inhibiting catalyst poisoning, short production cycle, and improving sulfur resistance

Inactive Publication Date: 2016-01-06
山东东源新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a vanadium-free rare earth-based titanium-tungsten powder and its preparation method, which solves the problems of the catalyst's anti-high temperature aging characteristics, catalyst active elements or active center dispersion, and the catalyst The problem of chemical poisoning

Method used

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  • Vanadium-free rare-earth-based titanium-tungsten powder and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, a vanadium-free rare earth-based titanium-tungsten powder, the composition includes: titanium dioxide 750kg, ammonium metatungstate 10kg, cerium nitrate 15kg, lanthanum nitrate 15kg, rhenium nitrate 10kg, manganese molybdenum nickel composite metal oxide (Mn-Mo- Ni-OX) 10kg, monoethanolamine 5kg, citric acid 5kg.

[0025] Wherein, the molar ratio of Mn / Mo / Ni elements in the Mn-Mo-Ni-Ox composite metal oxide active component is 1:0.5:0.5. Titanium dioxide is anatase nano titanium dioxide

[0026] The preparation method is:

[0027] (1) Anatase-type nano-titanium dioxide is added a sufficient amount of water to be made into a suspension with a concentration of 15%;

[0028] (2) Add 20 liters of water into the dissolving tank, then add monoethanolamine into the dissolving tank, when the temperature reaches 90°C, add ammonium metatungstate and stir evenly, and dissolve it completely for later use;

[0029] (3) Add 50 liters of water into the dissolving tank...

Embodiment 2

[0033] Embodiment 2, a kind of vanadium-free rare earth base titanium tungsten powder, composition comprises: titanium dioxide 900kg, ammonium paratungstate 60kg, cerium sulfate 20kg, lanthanum sulfate 40kg, manganese molybdenum nickel composite metal oxide (Mn-Mo-Ni-O X ) 15kg, monoethanolamine 15kg, citric acid 25kg.

[0034] Among them, manganese molybdenum nickel composite metal oxide (Mn-Mo-Ni-O X ) in the Mn / Mo / Ni element molar ratio of 1:1:1. Titanium dioxide is anatase nano titanium dioxide.

[0035] The preparation method is:

[0036] (1) Anatase-type nano-titanium dioxide is added a sufficient amount of water to be made into a suspension with a concentration of 15%;

[0037] (2) Add 30 liters of water into the dissolving tank, and then add monoethanolamine into the dissolving tank to mix and dissolve. When the temperature reaches 100°C, add ammonium paratungstate and stir evenly, and dissolve it completely for later use;

[0038] (3) 60 liters of water are added to...

Embodiment 3

[0042] Embodiment 3, a kind of vanadium-free rare earth base titanium tungsten powder, composition comprises: titanium dioxide 800kg, ammonium metatungstate 50kg, rhenium nitrate 50kg, manganese molybdenum nickel composite metal oxide (Mn-Mo-Ni-O X ) 12kg, monoethanolamine 10kg, citric acid 20kg.

[0043] Among them, manganese molybdenum nickel composite metal oxide (Mn-Mo-Ni-O X ) in Mn / Mo / Ni element molar ratio is 1:0.8:0.8. Titanium dioxide is anatase nano titanium dioxide.

[0044] The preparation method is:

[0045] (1) Anatase-type nano-titanium dioxide is added a sufficient amount of water to be made into a suspension with a concentration of 15%;

[0046] (2) Add 20 liters of water into the dissolving tank, and then add monoethanolamine into the dissolving tank to mix and dissolve. When the temperature reaches 88°C, add ammonium metatungstate and stir evenly, and dissolve it completely for later use;

[0047] (3) 50 liters of water are added to the dissolving tank, ...

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Abstract

The present invention provides vanadium-free rare-earth-based titanium-tungsten powder and a preparation method therefor, and solves a difficulty in improving high-temperature aging resistance and dispersity of a catalyst reactive element or an active-center are increased, and a problem of chemical poisoning of a catalyst. The vanadium-free rare-earth-based titanium-tungsten powder of the present invention comprises the components of: 750-900 parts of titanium dioxide, 10-60 parts of tungsten compounds, 30-60 parts of one or more of cerium compounds, lanthanum compounds and rhenium compounds, and 10-15 parts of complex metal oxide of manganese, molybdenum, nickel (Mn-Mo-Ni-OX). According to the present invention, the catalyst has the characteristics of high-temperature aging resistance and a long service life. The catalyst is free of addition of the reactive element vanadium, and is a real environmentally-friendly catalyst.

Description

technical field [0001] The invention belongs to the technical fields of environmental catalysis, environmental materials and air pollution control, and relates to a vanadium-free rare earth-based titanium-tungsten powder and a preparation method thereof. Background technique [0002] With the growth of energy consumption, a large amount of fossil fuels are consumed, resulting in the continuous increase of nitrogen oxide emissions, causing great damage to the environment. Therefore, NOx emission control under oxygen-enriched conditions has become a research hotspot in the field of environmental catalysis and air pollution control technology. Ammonia Selective Catalytic Reduction (Selective catalytic reduction, SCR) is considered to be one of the most effective methods to eliminate NOx from stationary sources, and its core issue is the development of catalysts. Currently, NH for industrial applications 3 -SCR catalyst, mainly V 2 o 5 -TiO 2 or V 2 o 5 -WO 3 (MoO 3 )-T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/10
Inventor 延云刚吴郎李友学延广东
Owner 山东东源新材料科技有限公司
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