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A MN-based catalyst and MN-based organic framework with SBA-15 composite

A technology of organic framework and composite materials, which is applied in the field of Mn-based catalysts and Mn-based organic framework and SBA-15 composite materials, can solve the problems of uncontrollable structure, unable to maintain stability when adsorbing toluene, and poor hydrothermal stability. Achieve high stability, controllable and adjustable material structure, and maintain stability

Active Publication Date: 2021-05-04
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most enterprises use activated carbon adsorption to purify volatile organic waste gas. However, activated carbon has limitations and defects in terms of adsorption capacity, regeneration, and cost during use. How to effectively remove toluene and volatile organic compounds in an environmentally friendly and cost-effective manner has become hot topic
The structure of existing catalyst materials is uncontrollable, the hydrothermal stability is not good, and the adsorption of toluene cannot maintain high stability

Method used

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  • A MN-based catalyst and MN-based organic framework with SBA-15 composite
  • A MN-based catalyst and MN-based organic framework with SBA-15 composite
  • A MN-based catalyst and MN-based organic framework with SBA-15 composite

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Use a measuring cylinder to measure 100ml of methanol solution and place it in a 200ml beaker, weigh 1.995g of 1,3,5-benzenetricarboxylic acid into the above 100ml methanol solution, stir and heat in a water bath at 35°C, 1,3,5-benzenetricarboxylic acid The formic acid was completely dissolved until a clear solution was formed. Measure 5ml of methanol solution with a graduated cylinder and place it in a 50ml beaker, weigh 2.5g of Mn(NO 3 ) 2 4H 2 O in the above 5ml methanol solution, stirred until completely dissolved, and then the dissolved Mn(NO 3 ) 2 4H 2 The O solution was poured into the above-mentioned 200ml beaker, and the stirring reaction was continued for 0.5h. The stirred solution was placed in a reaction kettle lined with polytetrafluoroethylene, sealed, heated in an oven at 120°C for 2 hours, washed, filtered, and dried at 80°C for 8 hours to obtain Mn with a regular octahedral structure. Add the Mn-based metal-organic framework catalyst obtained abov...

Embodiment 2

[0030] According to the preparation method of the present invention in Example 1, the organic ligand was changed, and trimesic acid was replaced by terephthalic acid. The evaluation method of the composite material is the same as in Example 1. The toluene adsorption test showed that the toluene adsorption capacity of the composite material prepared by this method was 73.9 mg / g.

Embodiment 3

[0032] According to the preparation method of the present invention in Example 1, the organic ligand was changed, and trimesic acid was replaced by 2,5-dihydroxyterephthalic acid. The evaluation method of the composite material is the same as in Example 1. The toluene adsorption test showed that the toluene adsorption capacity of the composite material prepared by this method was 91.5mg / g.

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Abstract

The present invention relates to a kind of Mn-based catalyst and Mn-based organic framework and SBA-15 composite material, Mn-based catalyst is prepared by the following method: (1) manganese source and organic ligand are mixed into a solvent, stirred to make them completely Dissolving in a solvent; (2) transferring the solution to a stainless steel reactor with polytetrafluoroethylene lining for reaction to obtain a product; (3) washing, filtering and drying the obtained product to obtain the product. Mn-based organic framework and SBA-15 composite material, the specific preparation method is, the Mn-based catalyst is added to the hydrochloric acid solution of P123, and then tetraethyl orthosilicate is added to disperse evenly to obtain a solid, and then the solid is extracted, Dried, that is. The Mn-based catalyst of the invention adopts an organic skeleton structure, the material structure is controllable and adjustable, not only has good hydrothermal stability but also has a large specific surface area; the composite material can absorb toluene and maintain high stability.

Description

technical field [0001] The invention relates to the field of organic framework adsorption materials, in particular to a Mn-based catalyst and a composite material of Mn-based organic framework and SBA-15. Background technique [0002] Volatile organic compounds have seriously polluted the environment, and toluene is one of them. As an important organic solvent, toluene mainly comes from industrial production, decorative materials and daily necessities such as cosmetics, disinfectants and preservatives, and its usage is also increasing. The harm of toluene to the human body is well known. It has a strong irritating effect on the eyes, respiratory system and skin. Long-term exposure will cause chronic poisoning. What is more serious is that benzene compounds have been identified as strong carcinogens by the WTO. At present, most enterprises use activated carbon adsorption to purify volatile organic waste gas. However, activated carbon has limitations and defects in terms of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J20/22B01J20/28
CPCB01J20/103B01J20/226B01J20/28061B01J20/28064B01J20/28066B01J20/28083B01J31/1691B01J31/2239B01J2220/46B01J2220/4806B01J2220/4812B01J2531/72
Inventor 张晓东吕旭天张夏璐宋亮刘宁
Owner UNIV OF SHANGHAI FOR SCI & TECH