Hydrophobic modification treatment method of a kind of zeolite molecular sieve

A zeolite molecular sieve and hydrophobic modification technology, which is applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of complex treatment process, large pollution, and high cost

Inactive Publication Date: 2015-10-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the processing process of the above methods that most of the methods currently used have many limitations, such as complicated processing, heavy pollution, high cost, and far from practical industrial applications.

Method used

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  • Hydrophobic modification treatment method of a kind of zeolite molecular sieve
  • Hydrophobic modification treatment method of a kind of zeolite molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] High temperature activation of nanoporous zeolite molecular sieves:

[0023] Take 500g of NaY type zeolite (Luoyang Jianlong Chemical Industry, fine powder, 25kg industrial packaging,) and put it into a ceramic crucible, wash the molecular sieve with deionized water until it is neutral, bake it at 150°C for 15 hours, put the dried molecular sieve into Put it into a muffle furnace, activate it at 500°C for 5 hours, then cool it down to room temperature to obtain an activated molecular sieve, take it out and store it in a desiccator. The activated molecular sieve has strong hygroscopicity and should be stored in a desiccator if not in use for a long time.

[0024] Drying of toluene:

[0025] Add CaH to toluene under nitrogen 2 Stir overnight to obtain dry toluene.

[0026] Links to couplers:

[0027] Take 50g of activated zeolite, add it to a 500mL single-necked flask, add 300mL of dry toluene, pipette 10mL of methyltrimethoxysilane into the single-necked flask, and r...

Embodiment 2

[0032] Hydrophobic molecular sieves were prepared according to the method in Example 1, and 60 mL of coupling agent methyltrimethoxysilane was added. The contact angle of the sample was measured to be 146 degrees.

Embodiment 3

[0034] Hydrophobic molecular sieves were prepared according to the method in Example 1. Added methyltrimethoxysilane 30mL. The contact angle of the sample was measured to be 140 degrees.

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Abstract

The invention belongs to the technical field of zeolite molecular sieve modification, and particularly relates to a hydrophobic modification treatment method for a zeolite molecular sieve. According to the method, firstly a molecular sieve is subjected to high temperature activation at the activation temperature of 400-600 DEG C; and toluene fully dried is used, an appropriate amount of coupling agent is added, reflux reaction is carried out at 110-120 DEG C for 10-20 hours, and the hydrophobic molecular sieve is obtained by cooling, filtering, washing with ethanol and fully drying. According to the method, molecular sieves of different hydrophobic capacities are obtained by carrying out hydrophobic modification on the surface of the molecular sieve using coupling agents of different substituents; the method is suitable for almost all zeolite molecular sieves, and the molecular sieve modified has no great changes in the aperture structure and still keeps good pore property; and the method is simple and easily implemented, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of hydrophobic modification of zeolite molecular sieves, and in particular relates to a method for performing hydrophobic modification on the surface of zeolite molecular sieves by high-temperature activation and using a hydrophobic coupling agent. technical background [0002] The research on the hydrophobicity of zeolite molecular sieves usually focuses on eliminating polar ions in the framework structure, such as reducing its aluminum content, or using no aluminum source to synthesize zeolite molecular sieves with pure silicon. The methods currently reported are all to eliminate the polar ions in the skeleton structure by reducing the content of crystalline aluminum. The main methods are as follows: [0003] The combined method of hydrothermal generation and acid extraction is to remove the aluminum atoms in the ammonium ion or cationic zeolite from the skeleton at a temperature above 500°C and in the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/00
Inventor 朱广山马和平田宇阳
Owner JILIN UNIV
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