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Template-free method for synthesizing hierarchical pore ZSM-5 zeolite molecular sieve from illite

A ZSM-5, zeolite molecular sieve technology, applied in the direction of crystalline aluminosilicate zeolite, borocarbonane silicone crystalline aluminosilicate zeolite, etc., can solve the problems of synthesis pollution, long synthesis cycle, and high synthesis cost, and achieve synthesis time. The effect of reducing, enriching silanol groups, and reducing synthesis cost

Active Publication Date: 2019-02-15
YANBIAN UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a technique for synthesizing multi-stage pore ZSM-5 zeolite molecular sieves using illite as a raw material and adopting a template-free method, so as to solve the problems caused by the use of chemical raw materials and Long synthesis period, high synthesis cost, and serious synthesis pollution caused by organic templates

Method used

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  • Template-free method for synthesizing hierarchical pore ZSM-5 zeolite molecular sieve from illite
  • Template-free method for synthesizing hierarchical pore ZSM-5 zeolite molecular sieve from illite
  • Template-free method for synthesizing hierarchical pore ZSM-5 zeolite molecular sieve from illite

Examples

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Embodiment example 1

[0029] A method for illite template-free synthesis of hierarchically porous ZSM-5 zeolite molecular sieves, specifically comprising the following processes:

[0030] Preparation of illite active silica slag:

[0031] Step 1, the illite raw material ore is simply ball-milled to powder;

[0032] Step 2, mix illite powder and hydrochloric acid with a concentration of 4mol / L at a ratio of 1:7.5g / mL, and put it into a hydrothermal reaction kettle;

[0033] Step 3, put the hydrothermal reaction kettle in an oven, and react at a temperature of 170 degrees Celsius for 4 hours;

[0034] Step 4: After taking out the reaction kettle, after suction filtration, the reaction product is washed with distilled water until it is neutral, and then dried, and the product is acid-washed illite slag material.

[0035] Synthesis of illite-based hierarchically porous ZSM-5 molecular sieve:

[0036] Step 1: Grind pickling illite slag, aluminum source and alkali source in a mortar for 10 minutes.

...

Embodiment example 2

[0041] Preparation of illite active silica slag: same as implementation case 1

[0042] Synthesis of illite-based hierarchically porous ZSM-5 molecular sieve:

[0043] Step 1: Grind pickling illite slag, aluminum source and alkali source in a mortar for 10 minutes.

[0044] Step 2, add distilled water, make material molar ratio be pickling illite slag material (SiO 2 ):Al 2 o 3 : NaOH : H 2 O=40:1:0.155:3.5, so that the materials are mixed evenly.

[0045] Step 3, transfer the mixed material to a hydrothermal reaction kettle, and crystallize at 190°C for 2 hours;

[0046] Step 4: Take out the reaction kettle, and after it returns to room temperature, take out the materials in the reaction kettle, and then filter and dry the reaction product to obtain ZSM-5 zeolite molecular sieve raw powder.

Embodiment example 3

[0048] Preparation of illite active silica slag: same as implementation case 1

[0049] Synthesis of illite-based hierarchically porous ZSM-5 molecular sieve:

[0050] Step 1: Grind pickling illite slag, aluminum source and alkali source in a mortar for 10 minutes.

[0051] Step 2, add distilled water, make material molar ratio be pickling illite slag material (SiO 2 ):Al 2 o 3 : NaOH : H 2 O=40:1:0.28:3.5, so that the materials are mixed evenly.

[0052] Step 3, transfer the mixed material to a hydrothermal reaction kettle, and crystallize at 190°C for 4 hours;

[0053] Step 4: Take out the reaction kettle, and after it returns to room temperature, take out the materials in the reaction kettle, and then filter and dry the reaction product to obtain ZSM-5 zeolite molecular sieve raw powder.

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Abstract

The invention discloses a template-free method for synthesizing a hierarchical pore ZSM-5 zeolite molecular sieve from illite. The method comprises the following steps: taking illite as a raw materialto obtain mesoporous silicon dioxide active silicon slag through acid pickling, wherein the purity of the active silicon slag is greater than 98%; and carrying out a reaction on the active silicon slag generated by pickling illite as a silicon aluminum source in a condition of adding an alkali source and regulating a rule ratio to obtain a hierarchical pore ZSM-5 zeolite molecular sieve catalyst.The method has the advantages of being short in synthetic period, low in synthetic cost, low in synthesized pollutant, high in catalytic ability of synthesized product and the like.

Description

technical field [0001] The invention relates to the field of inorganic solid catalysts, in particular to a template-free method for synthesizing hierarchically porous ZSM-5 zeolite molecular sieves using illite as a raw material. Background technique [0002] ZSM-5 zeolite molecular sieve can be used as a highly active solid acid catalyst and catalyst carrier due to its unique pore structure, high specific surface area and good thermal stability. It is not only widely used in traditional chemical production such as petroleum processing and petrochemical industry, Moreover, it has broad application prospects in emerging green chemical fields such as clean energy processing, environmental governance engineering, and biomass utilization. [0003] At present, the synthesis of traditional ZSM-5 molecular sieves mainly uses industrial chemical raw materials, by adding organic templates (such as tetrapropylammonium hydroxide, or tetrapropylammonium bromide) as structure-directing a...

Claims

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Application Information

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IPC IPC(8): C01B39/38
CPCC01B39/38C01P2002/72C01P2004/03
Inventor 姜男哲金星华历新宇孟万陈爽管冬冬
Owner YANBIAN UNIV
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