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Synthetic method of chabasite

A synthesis method and chabazite technology are applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of environmental pollution, no application prospect, low crystallinity, etc., and achieve the effect of simple implementation conditions and broad application prospects.

Inactive Publication Date: 2013-08-14
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it was mentioned in the first document that the direct synthesis of chabazite without adding an organic template was mentioned, but due to the relatively low crystallinity, there is no practical application prospect
The other two reaction methods should be carried out under the condition of the presence of organic template agent, and the template agent needs to be burned at high temperature in the later stage, which will cause environmental pollution

Method used

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  • Synthetic method of chabasite
  • Synthetic method of chabasite
  • Synthetic method of chabasite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] At room temperature, take 0.120 g of aluminum foil, add 0.68 ml of 13 mol / L potassium hydroxide solution, stir and mix evenly, add 0.693 g of TLC silica gel, then add 9.32 ml of water, continue stirring, and finally add 0.069 gram of seed crystals and stirred for half an hour. Transfer to a 20 ml polytetrafluoroethylene-containing stainless steel reactor, and crystallize at 150° C. for 2 days under autogenous pressure. Quenching, washing, filtering, and natural drying to obtain the molecular sieve powder.

Embodiment 2

[0018] At room temperature, take 0.120 g of aluminum foil, add 0.68 ml of 13 mol / L potassium hydroxide solution, stir and mix evenly, add 0.693 g of white carbon black, then add 9.32 ml of water, continue stirring, and finally add 0.173 g of crystal Seed, stir for half an hour. Transfer to a 20 ml polytetrafluoroethylene-containing stainless steel reactor, and crystallize at 85 degrees Celsius for 6 days under autogenous pressure. Quenching, washing, filtering, and natural drying to obtain the molecular sieve powder.

Embodiment 3

[0020] At room temperature, take 0.062 grams of aluminum foil, add 3.47 milliliters of 10 mol / liter potassium hydroxide solution, stir and mix evenly, add 2.222 grams of white carbon black, then add 6.53 milliliters of water, continue stirring, and finally add 0.111 grams of crystal Seed, stir for half an hour. Transfer to a 20 ml polytetrafluoroethylene-containing stainless steel reaction kettle, and crystallize at 110 degrees Celsius for 3 days under autogenous pressure. Quenching, washing, filtering, and natural drying to obtain the molecular sieve powder.

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Abstract

The invention relates to a synthetic method of chabasite, which comprises the step of: adopting traditional hydrothermal synthesis to prepare chabasite through a seed crystal guiding way under a condition of not adding an organic template agent. The method avoids using expensive template agents and also avoids environmental pollution caused by high temperature firing of the template agent in a product post-treatment process. The synthetic method of the chabasite disclosed by the invention has an important significance in terms of basic research; meanwhile, as the synthetic method is economic and environment-friendly, the synthetic method also has wide application foreground.

Description

technical field [0001] The invention relates to a method for synthesizing chabazite. The traditional synthesis methods of chabazite are mostly carried out under the condition of organic templates. The price of these templates is relatively high. When the templates are removed by high-temperature burning, a large amount of harmful gases will be generated, which will pollute the environment and seriously restrict its practical use. application. This patent mainly introduces a method for preparing chabazite by using the traditional hydrothermal synthesis method without adding an organic template agent through seed crystal orientation. This method is not only of great significance in basic research, but also has great application prospects in industry because of its economy and environmental protection. Background technique [0002] Chabazite has a CHA crystal structure and belongs to the trigonal crystal system. The unit cell parameters are: a=13.7 angstroms, c=14.8 angstroms...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02
Inventor 李牛何春倩项寿鹤
Owner NANKAI UNIV
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