Preparation method of high-activity diesel hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as poor hydration resistance and thermal stability, and achieve Low cost, good thermal stability and hydration resistance, easy to operate

Active Publication Date: 2017-03-22
邵武绿闽环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to aim at Al in the prior art 2 o 3 - MgO-supported hydrodesulfurization catalysts have the disadvantages of poor hydration resistance and thermal stability, and provide a method for preparing high-activity diesel hydrodesulfurization catalysts using binary magnesium-aluminum hydrotalcite as a precursor

Method used

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  • Preparation method of high-activity diesel hydrodesulfurization catalyst
  • Preparation method of high-activity diesel hydrodesulfurization catalyst
  • Preparation method of high-activity diesel hydrodesulfurization catalyst

Examples

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Embodiment 1

[0023] A preparation method of a highly active diesel hydrodesulfurization catalyst, comprising the steps of:

[0024] (1) Weigh 12.80 g Mg(NO 3 ) 2 ∙6H 2 O and 18.75 g Al(NO 3 ) 3 ∙9H 2 O, and dissolved in 350 mL of deionized water, then slowly added dropwise to the alkaline solution composed of sodium hydroxide and sodium carbonate and fully stirred, the pH of the system was adjusted to 9 during the dropwise addition, until the end of the dropwise addition Finally, the reaction solution was aged at room temperature for 12 hours, filtered, washed with deionized water until neutral, and dried at 80°C for 6 hours to obtain binary magnesium aluminum hydrotalcite;

[0025] (2) The binary magnesium aluminum hydrotalcite obtained in (1) was calcined at 600 °C for 6 hours and then molded to obtain a catalyst carrier; 15.00 g of the molded carrier was weighed and impregnated in a surface containing 1.29 g of active metal Mo (in MoO 3 meter) of (NH 4 ) 6 Mo 7 o 24 ∙4H 2 O ...

Embodiment 2

[0028] A preparation method of a highly active diesel hydrodesulfurization catalyst, comprising the steps of:

[0029] (1) Weigh 10.83 g MgCl at a molar ratio of 8:1 2 ∙6H 2 O and 2.50 g Al(NO 3 ) 3 ∙9H 2 O, and dissolved in 350mL of deionized water, then slowly added dropwise to an alkaline solution composed of sodium hydroxide and sodium carbonate and fully stirred, the pH of the system was adjusted to be 12 during the dropwise addition, and after the dropwise addition was completed, After the reaction solution was aged at room temperature for 12 hours, the reaction solution was filtered, washed with deionized water until neutral, and dried at 90°C for 6 hours to obtain binary magnesium aluminum hydrotalcite;

[0030] (2) The binary magnesium aluminum hydrotalcite obtained in (1) was calcined at 700°C for 6 hours and then molded to obtain a catalyst carrier; 15.00 g of the molded carrier was weighed and impregnated in a surface containing 1.51 g of active metal W (in WO...

Embodiment 3

[0033] A preparation method of a highly active diesel hydrodesulfurization catalyst, comprising the steps of:

[0034] (1) Weigh 11.52 g Mg(NO 3 ) 2 ∙6H 2 O and 5.13 g Al(SO 4 ) 3 , and dissolved in 350 mL of deionized water, and then slowly added dropwise to the alkaline solution composed of sodium hydroxide and sodium carbonate and fully stirred, the pH of the system was adjusted to 10 during the dropwise addition, and after the dropwise addition was completed, the After the reaction solution was aged at room temperature for 12 hours, the reaction solution was filtered, washed with deionized water until neutral, and dried at 80°C for 6 hours to obtain binary magnesium aluminum hydrotalcite;

[0035] (2) The binary magnesium aluminum hydrotalcite obtained in (1) was calcined at 800°C for 6 hours and then molded to obtain a catalyst carrier; 15.00 g of the molded carrier was weighed and impregnated in a catalyst containing 1.17 g of active Metal Co (as CoO) and 1.29 g act...

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Abstract

The invention discloses a preparation method of a high-activity diesel hydrodesulfurization catalyst, and particularly relates to the preparation method of the high-activity diesel hydrodesulfurization catalyst adopting binary magnesium aluminum hydrotalcite as a carrier. The catalyst adopts binary magnesium aluminum hydrotalcite which is prepared through the coprecipitation method and is subjected to pretreatment as the carrier, and the carrier carries one or more transition metals in the VIB and/or VIII family. The catalyst prepared through the method has the characteristics of high mechanical strength, good anti hydration, and the like, the catalyst represents relatively high hydrodesulfurization activity after being applied to the diesel hydrodesulfurization reaction, and the conversion rate of the prepared catalyst for dibenzothiophene (DBT) is 95% or above; and besides, the method is simple in preparation technology, easy and convenient to operate and low in cost, and has good economic benefits and environmental benefits.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a preparation method of a high-activity diesel hydrodesulfurization catalyst. Background technique [0002] As an important energy source, diesel plays an important role in the current social economy. However, the level of sulfur content in diesel has a very important impact on pollutant emissions, such as NO x and particulate matter (PM) emissions, and poisons catalysts in automotive exhaust catalytic converters. Therefore, among many physical and chemical parameters of diesel, sulfur content has become a very important indicator. Especially in recent years, the production of clean diesel has become an urgent need for environmental protection, and the governments of various countries have become more and more strict on the sulfur content of diesel, making the production of low-sulfur or even sulfur-free clean diesel has become the main trend in the world today. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/30B01J23/882B01J23/883C10G45/04C10G45/06C10G45/08
CPCB01J23/28B01J23/30B01J23/882B01J23/883C10G45/04C10G45/06C10G45/08C10G2300/202C10G2400/04
Inventor 岳源源郑晓桂鲍晓军
Owner 邵武绿闽环保科技有限公司
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