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Magnetic molecular sieve catalyst doped with transition metal and preparation method and application of magnetic molecular sieve catalyst

A technology of transition metals and transition metal elements, applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems that hinder the wide-scale application and promotion of molecular sieves, are difficult to separate, limit applications, etc., and achieve good reuse High stability, good stability and uniform shape

Inactive Publication Date: 2018-03-09
禾祁(上海)化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inert framework of mesoporous molecular sieves limits its application in catalytic reactions, and molecular sieves mostly exist in powder form, which are not easy to separate in the liquid phase reaction process, hindering the wide-scale application and promotion of molecular sieves.

Method used

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  • Magnetic molecular sieve catalyst doped with transition metal and preparation method and application of magnetic molecular sieve catalyst
  • Magnetic molecular sieve catalyst doped with transition metal and preparation method and application of magnetic molecular sieve catalyst
  • Magnetic molecular sieve catalyst doped with transition metal and preparation method and application of magnetic molecular sieve catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Fe 3 o 4 Preparation of micelles: Under a nitrogen atmosphere, 2g of ferric chloride and 0.8g of ferric chloride were dissolved in 10ml of deionized water, sonicated to dissolve them completely, and the above solution was added dropwise to 100ml (1mol / L) of ammonia In the aqueous solution, a black sol was formed and stirred for 5 min.

[0035] The synthetic steps of catalyst: 2.4g hexadecyltrimethylammonium bromide is dissolved in the mixed solution of 120ml deionized water and 10.5ml strong ammonia water, stirs 30min and makes it dissolve completely, adds dropwise 20ml Fe 3 o 4 For micelles, after stirring for 1 min, add 0.3 g of cobalt chloride to the above mixed solution, after stirring for 30 min, add 10 g of tetraethyl orthosilicate dropwise, and then stir for 2 h, and the final mixed sample is hydrothermally heated at 120 ° C for 24 h . The hydrothermal samples were washed three times with deionized water and ethanol, and dried at 60 °C. Finally, it was calci...

Embodiment 2

[0038] The preparation process of the iron oxide micelles is the same as in Example 1, and 1.2 g of ferric chloride and 0.8 g of ferric chloride are selected to form a black sol.

[0039] Use nickel chloride to replace cobalt chloride in embodiment 1, other preparation processes are identical with embodiment 1, choose 1.2g hexadecyltrimethylsilane, add 30ml Fe dropwise 3 o 4 For micelles, 10 g of tetraethylorthosilicate was added, and the final mixed sample was hydrothermally heated at 150° C. for 48 h. The hydrothermal samples were washed three times with deionized water and ethanol respectively, and dried at 60°C. Finally, it was calcined at 500°C for 6h in air atmosphere. The catalytic performance measurement procedure of the catalyst is the same as in Example 1. After 60 minutes of reaction, the Orange II removal rate is 100%, and the separation is complete after 35 seconds of magnetic separation.

Embodiment 3

[0041] The preparation process of the iron oxide micelles is the same as in Example 1, and 3 g of ferric chloride and 0.8 g of ferric chloride are selected to form a black sol.

[0042] Use manganese chloride to replace cobalt chloride in embodiment 1, other preparation processes are identical with embodiment 1, choose 3.6g hexadecyltrimethylsilane, add 10ml Fe dropwise 3 o 4 For micelles, 10 g of tetraethyl orthosilicate was added, and the final mixed sample was hydrothermally heated at 100° C. for 72 h. The hydrothermal samples were washed three times with deionized water and ethanol respectively, and dried at 60°C. Finally, it was calcined at 600°C for 8h in air atmosphere. The catalytic performance measurement procedure of the catalyst was the same as in Example 1. After 55 minutes of reaction, the Orange II removal rate was 100%, and the separation was complete after 32 seconds of magnetic separation.

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Abstract

The invention provides a preparation method of a magnetic molecular sieve catalyst of which a skeleton is doped with transition metal. According to the catalyst, transition element metal is used as amain catalyst, magnetic iron species are used as a magnetic source, a mesoporous molecular sieve material is used as a carrier, and the catalyst is synthesized by a hydrothermal one-pot method. The prepared catalyst has a neat porous structure of the mesoporous molecular sieve material, and large adsorption active sites are provided; high reaction activity and stability are achieved owing to the transition metal doped in the skeleton; and the wrapped magnetic iron species have good reusablility. The catalyst has the characteristics of high crystallinity, large specific surface area, good dispersibility, high stability, good reusability and the like. The effect of removing organic matters such as Orange II is excellent, and the economic benefit and social benefit are good.

Description

technical field [0001] The present invention proposes the application of a magnetic mesoporous molecular sieve catalyst doped with transition metals in dye degradation, which is suitable for wastewater treatment in the field of environmental protection, and technically involves the fields of catalyst recovery and the like. Background technique [0002] In recent years, organic pollutants such as organic pesticides, organic dyes, and aromatic hydrocarbons have caused serious pollution and damage to the environment, especially water resources, and due to the high toxicity and refractory biodegradability of such pollutants, it is difficult to obtain Effective processing. At present, conventional wastewater treatment methods mainly include biological methods, physical methods, and chemical methods. The biological method is mainly to degrade and separate the colored substances in the wastewater through microbial degradation; the physical method is mainly to physically separate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C02F1/00C02F101/30
CPCC02F1/00B01J29/0333C02F2101/308B01J2229/183B01J35/33
Inventor 徐卿其他发明人请求不公开姓名
Owner 禾祁(上海)化工有限公司
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