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Synthesis method for zeolite

A technology for synthesizing zeolite and seed crystals, which is applied in the direction of crystalline aluminosilicate zeolite, mercerized crystalline aluminosilicate zeolite, etc., to achieve the effects of saving dissolution, less dosage and high zeolite yield

Inactive Publication Date: 2009-01-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method does not use the aqueous solution colloidal process, it needs to be roasted at high temperature to form a colloid

Method used

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  • Synthesis method for zeolite
  • Synthesis method for zeolite
  • Synthesis method for zeolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The synthesis of embodiment 1 mordenite

[0024] Weigh solid SiO 2 4.9 grams (0.08mol), Al 2 o 3 1.36 g (0.01 mol), 0.96 g (0.024 mol) of sodium hydroxide, put it into a blender for mechanical mixing, after fully stirring, put the mixture on a support, feed water vapor, and maintain the system temperature at 170 ° C to start crystallization , crystallization time is 6 days, can obtain mordenite type zeolite (the structure of XRD determination is as attached figure 1 shown).

Embodiment 2

[0025] The synthesis of embodiment 2 mordenite

[0026] Weigh SiO 2 10.0 g (0.16 mol), Al 2 o 3 1.36 g (0.01 mol), 3.2 g (0.08 mol) of sodium hydroxide, put it into a blender for mechanical mixing, after fully stirring, put the mixture on a stand, feed water vapor, and maintain the system temperature at 260 ° C to start crystallization , crystallization time is 3 days, can obtain mordenite type zeolite (the structure of XRD determination is as attached figure 2 shown).

Embodiment 3

[0027] Embodiment 3: the synthesis of ZSM-5 type zeolite

[0028] Weigh SiO 2 18.0 g (0.3 mol), Al 2 o 3 1.36 grams (0.01mol), 3.6 grams (0.09mol) of sodium hydroxide, 0.8 grams of ZSM-5 seed crystals, 6.6 grams (0.09mol) of butylamine, put it into a stirrer and carry out mechanical mixing, after fully stirring, the The mixture is placed on a support, fed with water vapor, and the system temperature is maintained at 150° C. to start crystallization. The crystallization time is 1 day, and the ZSM-5 type zeolite can be obtained (the structure determined by XRD is shown in the attached image 3 shown).

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Abstract

This invention relates to a method for synthesizing zeolite, which mixes a solid Si source and Al source under a high alkali condition, mixes them fully and crystallizes them in vapour to synthesize many kinds of zeolite products of silk zeolite, ZSM-5 or MCM-22, beta.

Description

technical field [0001] The present invention relates to a method for synthesizing zeolite. Various zeolite products such as mordenite, ZSM-5, MCM-22, and beta zeolite can be obtained. Background technique [0002] Zeolites are very useful inorganic materials and are widely used in many fields such as catalysis and separation. The synthesis of zeolite generally adopts a hydrothermal synthesis method, such as patents CN 1074388C, CN1328961A, CN1166563C, CN1530323A, etc., which use nitrogen-containing organic matter as a template to synthesize molecular sieves. The entire synthesis process is carried out in an aqueous medium. The template agent, silicon source, and aluminum source are dissolved in water. The template agent is a polar substance that is easily soluble in water. After dissolving in water, its effective components will be lost with the discharge of the mother liquor, resulting in a low utilization rate of the expensive template agent. , and pollute the environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/26
Inventor 陈标华曹刚黄崇品李冰洁
Owner BEIJING UNIV OF CHEM TECH