ZSM-5 molecular sieve as well as mesoporous treatment method and application thereof

A technology of ZSM-5 and treatment methods, which is applied in the field of molecular sieve performance optimization, can solve problems such as difficult control of process conditions, achieve the effects of solving durability and odor problems of polymer materials, exerting antibacterial efficacy, and improving ion exchange capacity

Active Publication Date: 2021-04-16
贵州凯科特材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few pore-enlarging treatment methods for ZSM-5 molecular sieves. Most of the existing technologies need to be carried out under high temperature and high pressure conditions, or the process conditions during the modification process are not easy to control.

Method used

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  • ZSM-5 molecular sieve as well as mesoporous treatment method and application thereof
  • ZSM-5 molecular sieve as well as mesoporous treatment method and application thereof
  • ZSM-5 molecular sieve as well as mesoporous treatment method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. A method for mesoporizing ZSM-5 molecular sieve at normal temperature and pressure, the specific steps are:

[0025] Stir 2kg of microporous ZSM-5 molecular sieve in 6L of 3mol / L sodium hydroxide solution and soak for 2 hours, filter and drain, and wash to obtain filter cake 1, and put filter cake 1 into 5L of 1mol / L tetrapropylene After being stirred in an ammonium hydroxide solution, soak for 2 hours, filter and drain to obtain filter cake 2, and obtain a wet state ZSM-5 molecular sieve with an average particle size of 7 μm and an average pore size of 30 nm.

[0026] 2. Using the above-mentioned ZSM-5 molecular sieve as a carrier to prepare a self-made silver-loaded molecular sieve, the specific steps are:

[0027] Put the wet ZSM-5 molecular sieve filter cake obtained above into 5L of 4mol / L silver nitrate solution and soak for 2 hours, take it out and dry it, and then place it in a microwave drying oven with a temperature of 40°C and dry it for 35 minutes to obta...

Embodiment 2

[0030] 1. A method for mesoporizing ZSM-5 molecular sieve at normal temperature and pressure, the specific steps are:

[0031] Stir 2kg of microporous ZSM-5 molecular sieve in 7L of 2mol / L sodium hydroxide solution and soak for 2 hours, filter and drain, and wash to obtain filter cake 1, and put filter cake 1 into 4L of 1.5mol / L sodium hydroxide solution. Stir in the propyl ammonium hydroxide solution, soak for 2 hours, filter and drain to obtain filter cake 2, and obtain a wet state ZSM-5 molecular sieve with an average particle size of 10 μm and an average pore size of 16 nm.

[0032] 2. Using the above-mentioned ZSM-5 molecular sieve as a carrier to prepare a self-made silver-loaded molecular sieve, the specific steps are:

[0033] Put the wet ZSM-5 molecular sieve filter cake obtained above into 5L of 4mol / L silver nitrate solution and soak for 2 hours, take it out and dry it, and then place it in a microwave drying oven with a temperature of 40°C and dry it for 35 minutes...

Embodiment 3

[0036] A method for treating ZSM-5 molecular sieves by mesoporization at normal temperature and pressure, the specific steps are:

[0037] Stir 2kg of microporous ZSM-5 molecular sieve in 8L of 2mol / L sodium hydroxide solution and soak for 2 hours, filter and drain, and wash to obtain filter cake 1, and put filter cake 1 into 5L of 1mol / L tetrapropylene Stir in ammonium hydroxide solution, soak for 2 hours, filter and drain to obtain filter cake 2, and obtain wet state ZSM-5 molecular sieve with an average particle size of 11 μm and an average pore size of 20 nm.

[0038] 2. Using the above-mentioned ZSM-5 molecular sieve as a carrier to prepare a self-made silver-loaded molecular sieve, the specific steps are:

[0039] Put the wet ZSM-5 molecular sieve filter cake obtained above into 6L of 3.5mol / L silver nitrate solution and soak for 2 hours, take it out and dry it, and place it in a microwave drying oven with a temperature of 40°C for 30 minutes to obtain undetermined Type...

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Abstract

The invention belongs to the technical field of molecular sieve performance optimization, and particularly relates to a ZSM-5 molecular sieve and a mesoporous treatment method and application thereof. The microporous ZSM-5 molecular sieve is subjected to mesoporous treatment at normal temperature and normal pressure, so that the ion exchange capacity of the molecular sieve is greatly improved, pore channels suitable for silver ions to enter are 96% or above, the highest silver loading capacity can reach 43.36 WT% and is improved by about 2% compared with the silver loading capacity of a commonly-used silver-loaded NaY type zeolite molecular sieve, and the antibacterial effect is obviously improved; besides, after the antibacterial agent is added into a polymer modified material, the antibacterial effect of Ag is greatly exerted, and the problems of durability of a silver antibacterial material and odor of a polymer material are solved.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve performance optimization, and in particular relates to a ZSM-5 molecular sieve and a mesoporization treatment method and application thereof. Background technique [0002] ZSM-5 zeolite is a new type of zeolite molecular sieve containing organic amine cations synthesized by Mobil Corporation of the United States in the late 1960s. Due to its uniqueness in chemical composition, crystal structure and physical and chemical properties, it is mainly used in the preparation of catalysts, especially as a catalyst for hydrocarbon cracking. Due to its high thermal stability, it can withstand regeneration high temperature of the catalyst. With zeolite molecular sieve as catalyst, only molecules smaller than crystal pores can enter and exit. The progress of catalytic reaction is controlled by the size of zeolite crystal pores. Zeolite catalysts show great selectivity to the size and shape of reactan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/12C08K9/04C08K9/02C08K7/26C08K3/28C08K3/08C08L23/06C08K13/06
Inventor 王天喜段龙江郑红开熊晏安宋世豪杨荣强蔡孝生文淳智靳灵杰
Owner 贵州凯科特材料有限公司
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