Preparation method of denitrification catalyst carrier titanium dioxide

A denitrification catalyst, titanium dioxide technology, applied in the direction of catalyst activation/preparation, titanium dioxide, chemical instruments and methods, etc., can solve the problems of high impurity content and low activity of titanium dioxide, and achieve the effect of low impurity content, high activity and high catalytic efficiency

Active Publication Date: 2019-01-15
ADANA FOOD TECH LIUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing titanium dioxide as a denitrification catalyst carrier, which solves the problems of high impurity content and low activity of titanium dioxide prepared by the existing titanium dioxide preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1—Preparation method of denitrification catalyst carrier titanium dioxide

[0025] It includes the following steps:

[0026] A. Use the metatitanic acid obtained by the sulfuric acid method as the raw material, make it and deionized water according to the mass ratio of 1:3 to prepare the first suspension, and adjust the pH of the suspension to pH ≤ 1 with sulfuric acid; then stir State, drop Ti 3+ Titanous sulfate solution with an ion concentration of 0.5g / L, and repeated filtration, washing, and sampling inspection until the total Fe in the sampled filter residue accounted for 0.0047wt%, and the first filter residue was obtained;

[0027] B. The first filter residue and deionized water are prepared into the second suspension according to the mass ratio of 1:3, and the pH of the suspension is adjusted to pH 7.5±0.5 with ammonia water, and then repeated filtration, washing, and sampling inspection , until the total S in the sampling filter residue accounts f...

Embodiment 2

[0032] Embodiment 2—Preparation method of denitrification catalyst carrier titanium dioxide

[0033] It includes the following steps:

[0034] A. Use the metatitanic acid obtained by the sulfuric acid method as the raw material, make it and deionized water according to the mass ratio of 1:3 to prepare the first suspension, and adjust the pH of the suspension to pH ≤ 1 with sulfuric acid; then stir State, drop Ti 3+ Titanous sulfate solution with an ion concentration of 0.5g / L, and repeated filtration, washing, and sampling inspection until the total Fe in the sampled filter residue accounts for 0.005wt%, and the first filter residue is obtained;

[0035] B. The first filter residue and deionized water are prepared into the second suspension according to the mass ratio of 1:3, and the pH of the suspension is adjusted to pH 7.5±0.5 with ammonia water, and then repeated filtration, washing, and sampling inspection , until the total S in the sampling filter residue accounts for ...

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Abstract

The invention discloses a preparation method of a denitration catalyst carrier TiO2. The preparation method comprises the following steps: firstly, preparing TiO2 used as a raw material into metatitanic acid by adopting a sulfuric acid method, and preparing the metatitanic acid into a suspension, and adjusting the pH of the suspension to be not more than 1; then, drop by drop adding a titanous sulfate solution, and performing filtration and washing; then anew preparing obtained filter residues into a suspension, and adjusting the pH value of the suspension to be 7.5+/-0.5 by ammonia water, and performing filtration and washing; then anew preparing obtained filer residues into a suspension again, and adjusting the pH value of the suspension to be 6.5 to 7.0 by acetic acid, and then performing filtration and washing; and carrying out low-temperature vacuum drying on the suspensions processed through the above-mentioned steps; finally, cooling and grinding to form powder. According to the invention, the existing preparation method of the denitration catalyst carrier TiO2 is improved, and the TiO2 preparation method which has simple process and does not require high-temperature heating is put forward, furthermore, the obtained product is high in quality and the high catalytic efficiency of a denitration catalyst is ensured.

Description

technical field [0001] The invention belongs to the technical field of fine chemical products, and in particular relates to a preparation method of titanium dioxide as a denitrification catalyst carrier. Background technique [0002] At present, the commonly used denitration catalyst is mainly based on TiO 2 as the carrier, V 2 o 5 / WO 3 and MoO 3 and other components as active ingredients. Among them, TiO as a catalyst support material 2 plays a major role in the catalytic effect, however, the existing TiO 2 Most of them have the following defects: [0003] 1) The impurity content is high, resulting in the TiO 2 The denitrification catalyst prepared as a carrier material has low catalytic efficiency and short service life; [0004] Because most of the existing preparation methods use high-temperature heating preparation conditions, resulting in TiO 2 The activity is reduced, thus affecting the TiO 2 Catalytic efficiency of the denitration catalyst prepared for th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J37/03C01G23/053
CPCB01J21/063B01J37/038C01G23/053
Inventor 王凯
Owner ADANA FOOD TECH LIUZHOU
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