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A kind of magnesium aluminum hydrotalcite for organosulfur catalysis and its preparation method and application

A magnesium-aluminum hydrotalcite and organic sulfur technology, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve problems such as poor crystallinity, achieve high crystallinity, simple and easy steps, regular and controllable morphology Effect

Inactive Publication Date: 2021-11-02
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above studies have solved some problems, they all have the problem of poor crystallinity

Method used

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  • A kind of magnesium aluminum hydrotalcite for organosulfur catalysis and its preparation method and application
  • A kind of magnesium aluminum hydrotalcite for organosulfur catalysis and its preparation method and application
  • A kind of magnesium aluminum hydrotalcite for organosulfur catalysis and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: 2.54 g of magnesium methoxide and 2 g of aluminum isopropoxide were weighed respectively, and then transferred to an agate mortar and ground manually for 5 minutes. After the mechanical mixing was completed, the mixed material was placed in a polytetrafluoroethylene lining of a hydrothermal kettle, and then 1ml of sodium bicarbonate solution (1 M) was added to react at 150 °C for 12 h. After the reaction was completed, the initial product was cooled to room temperature, and then the initial product was dried in an oven at 100 °C for 12 h. After natural cooling, the magnesium aluminum hydrotalcite for organosulfur catalysis was obtained, which was designated as catalyst A.

Embodiment 2

[0024] Example 2: 3.36 g of magnesium ethoxide and 2 g of aluminum isopropoxide were weighed respectively, and then transferred to an agate mortar and ground manually for 10 minutes. After the mechanical mixing was completed, the mixed material was placed in a polytetrafluoroethylene lining of a hydrothermal kettle, and then 3ml of sodium carbonate solution (1.2 M) was added to react at 120 °C for 6 h. After the reaction was completed, the initial product was cooled to room temperature, and then the initial product was dried in an oven at 100 °C for 12 h. After natural cooling, the magnesium aluminum hydrotalcite for organosulfur catalysis was obtained, which was designated as catalyst B.

Embodiment 3

[0025] Example 3: 3.36 g of magnesium ethoxide and 2 g of aluminum isopropoxide were weighed respectively, and then transferred to an agate mortar and ground manually for 30 minutes. After the mechanical mixing was completed, the mixed material was placed in a polytetrafluoroethylene lining of a hydrothermal kettle, and then 5ml of sodium carbonate solution (1 M) was added to react at 130 °C for 3 h. After the reaction was completed, it was cooled to room temperature to obtain the primary product, which was then dried in an oven at 80 °C for 24 h. After natural cooling, the magnesium aluminum hydrotalcite for organosulfur catalysis was obtained, which was designated as catalyst C.

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Abstract

The invention relates to a magnesium-aluminum hydrotalcite for organic sulfur catalysis and its preparation method and application. It uses a mechanochemical synthesis method to achieve uniform dispersion between metals through grinding, and then adds a small amount of precipitant to promote hydrolysis and high temperature curing. Finally, magnesium aluminum hydrotalcite with good crystallinity is obtained. The synthesis condition of the method is simple, the reaction is rapid, the time consumption is short, only a small amount of water is needed in the preparation process, the atom utilization rate is high, and no waste water is generated. The magnesium aluminum hydrotalcite prepared by the present invention exhibits high crystallinity, regular hexagonal nanosheet structure, and has a COS conversion rate as high as 100% at a temperature of 70°C, and is suitable for catalytic hydrolysis of carbonyl sulfide gas at medium and low temperatures.

Description

technical field [0001] The invention belongs to the field of preparation and application of inorganic materials, and in particular relates to a magnesium aluminum hydrotalcite used for organosulfur catalysis, a preparation method and application thereof. Background technique [0002] With the rapid growth of the global economy and the rapid demand for energy, the efficient and clean utilization of coal resources is becoming more and more important. The pollution caused by inefficient use of energy not only seriously affects air quality and threatens human health, but also further corrodes equipment and catalysts. Among them, COS, as a typical representative of sulfide, is a more harmful gas, and its chemical properties are not good. Lively, difficult to remove. At present, the COS removal methods commonly used in industry mainly include hydrogenation conversion method, absorption method, oxidation conversion method, photolysis method and hydrolysis method. And the hydrolys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/00B01J27/232B01J35/10B01D53/86B01D53/48
CPCC01F7/00B01J27/232B01D53/8606B01D53/485C01P2002/72C01P2004/03B01J35/613B01J35/615B01J35/633B01J35/647
Inventor 刘福建米金星张秋云郑勇江莉龙
Owner FUZHOU UNIV
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