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Titanium-tungsten powder and preparation method and application thereof

A technology of titanium tungsten powder and sulfuric acid method, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as short service life and poor selectivity, achieve sintering strength, high specific surface area, and broaden applications Effect

Inactive Publication Date: 2016-11-09
上海净球环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of traditional catalysts, it is found that the selectivity of the reaction is not strong, and the service life is short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of perovskite structure materials

[0055] a) adding titanium tetrachloride to deionized water to form a colloid with a concentration of 20% by weight, adding ammonia water to adjust the pH value to 7-8, and washing the obtained colloidal material with deionized water;

[0056] b) adding molybdenum oxalate to deionized water to form a colloid with a concentration of 25% by weight, adding ammonia water to adjust the pH value to 7-8, and washing the obtained colloidal material with deionized water;

[0057] c) Combine the above washed material with V 2 o 5 Mixing, the ratio of the amount of titanium, molybdenum and vanadium is 1:0.5:1, heat preservation and drying for 25 hours, the heat preservation temperature is 130 °C, and finally, the material obtained after heat preservation is pre-calcined in a muffle furnace, and the heat preservation is carried out under an air atmosphere. , the temperature was raised to 400°C at a heating rate of 10°C / min, the t...

Embodiment 2

[0070] (1) Preparation of perovskite structure materials

[0071] a) adding titanium tetrachloride to deionized water to form a colloid with a concentration of 30% by weight, adding ammonia water to adjust the pH value to 7-8, and washing the obtained colloidal material with deionized water;

[0072] b) adding molybdenum oxalate to deionized water to form a colloid with a concentration of 25% by weight, adding ammonia water to adjust the pH value to 7-8, and washing the obtained colloidal material with deionized water;

[0073] c) Combine the above washed material with V 2 o 5 Mixing, the ratio of the amount of titanium, molybdenum and vanadium is 1.5:0.8:1.5, heat preservation and drying for 25 hours, the heat preservation temperature is 140°C, and finally, the material obtained after heat preservation is pre-calcined in a muffle furnace, and the heat preservation is carried out under an air atmosphere. , the temperature was raised to 450°C at a heating rate of 15°C / min, th...

Embodiment 3

[0086] (1) Preparation of perovskite structure materials

[0087] a) adding titanium tetrachloride to deionized water to form a colloid with a concentration of 35% by weight, adding ammonia water to adjust the pH value to 7-8, and washing the obtained colloidal material with deionized water;

[0088] b) adding molybdenum oxalate to deionized water to form a colloid with a concentration of 25% by weight, adding ammonia water to adjust the pH value to 7-8, and washing the obtained colloidal material with deionized water;

[0089] c) Combine the above washed material with V 2 o 5 Mixing, the ratio of the amount of titanium, molybdenum and vanadium is 2.5:1:2.5, heat preservation and drying for 25 hours, the heat preservation temperature is 150 °C, and finally, the material obtained after heat preservation is pre-calcined in a muffle furnace, and the heat preservation is carried out under an air atmosphere. , the temperature was raised to 450°C at a heating rate of 15°C / min, the...

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PUM

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Abstract

The invention provides a titanium-tungsten powder and a preparation method and application thereof. The titanium-tungsten powder is prepared from the following method: preparing a tungsten precursor aqueous solution, adding ferric nitrate into the above solution, adding metatitanic acid prepared by a sulfuric acid method and a surface dispersant into the above solution and stirring, and finally drying and calcining to obtain the required titanium-tungsten powder. The tungsten precursor is dissoluble tungsten salt. The metatitanic acid prepared by the sulfuric acid method is used as a precursor to synthesize the titanium-tungsten powder. The problem that tungsten is not uniformly supported and production efficiency is low in the traditional titanium-tungsten powder preparation process can be avoided. When the product is used for preparation of a catalyst, selectivity of a catalytic reaction is increased, and sulfur resistance of the catalyst is greatly raised.

Description

technical field [0001] The invention relates to the field of diesel engine tail gas treatment, in particular to a titanium-tungsten powder and its preparation method and application. Background technique [0002] In the past 20 years, in the face of the pressure brought by the depletion of the world's oil resources to social development and the impact of the rapid increase in car ownership on the environment, the world's automobiles have been constantly looking for solutions to achieve sustainable development of the automobile industry. In the development of advanced technology, people have a newer and deeper understanding of diesel engines and diesel vehicles. Compared with gasoline engines, diesel engines are economical and powerful, but they have brought certain negative effects on environmental pollution. With the deterioration of environmental quality, the limit value of exhaust pollution from mobile sources such as vehicles is becoming increasingly strict, especially n...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J35/04B01D53/94
CPCB01D53/9418B01J23/002B01J23/888B01D2258/012B01J2523/00B01J35/56B01J2523/47B01J2523/69B01J2523/842B01J2523/55B01J2523/68
Inventor 施雅琼
Owner 上海净球环保科技有限公司
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