Method for removing organic template of molecular sieve

An organic template agent and molecular sieve technology, applied at low temperature, simple and rapid removal of organic template agent, can solve the problems of complex device and high operating temperature, and achieve the effects of easy operation, high processing efficiency and wide technical application range.

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention relates to a method for removing molecular sieve organic templates. The method mainly uses dielectric barrier discharge technology to g

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 20 grams of ammonium type beta molecular sieve (S1) and place it in the discharge area of ​​the dielectric barrier discharge device, and place it evenly, and feed air into the device, the air flow rate is 1000ml / min, and the pulse width is 250ns under the voltage of 20KV. The pulse rise time is 50 ns, the frequency is 50 Hz, and the treatment is 60 minutes to obtain the treated molecular sieve A.

[0022] What used in the embodiment is the beta molecular sieve that contains organic template agent, and template agent is tetraethylammonium hydroxide, and skeleton silicon-aluminum ratio is 11.26, and wherein sodium content (Na 2 O) < 0.04% wt. See Table 1 for the treatment conditions of the S1 molecular sieve release agent under air conditions.

Embodiment 2

[0024] Get 20 grams of ammonium type beta molecular sieve (S1) and place it in the discharge area of ​​the dielectric barrier discharge device, and place it evenly, and feed air into the device, the air flow rate is 1000ml / min, and the pulse width is 600ns under the voltage of 30KV. The pulse rise time is 50 ns, the frequency is 500 Hz, and the treatment is performed for 40 minutes to obtain the treated molecular sieve B.

[0025] What used in the embodiment is the beta molecular sieve that contains organic template agent, and template agent is tetraethylammonium hydroxide, and skeleton silicon-aluminum ratio is 11.26, and wherein sodium content (Na 2 O) < 0.04% wt. See Table 1 for the treatment conditions of the S1 molecular sieve release agent under air conditions.

Embodiment 3

[0027]Get 20 grams of ammonium type beta molecular sieve (S1) and place it in the discharge area of ​​the dielectric barrier discharge device, and place it evenly, and feed air into the device, the air flow rate is 1000ml / min, and the pulse width is 1000ns under the voltage of 50KV. The pulse rise time is 100 ns, the frequency is 100 Hz, and the treatment is for 50 minutes to obtain the treated molecular sieve C.

[0028] What used in the embodiment is the beta molecular sieve that contains organic template agent, and template agent is tetraethylammonium hydroxide, and skeleton silicon-aluminum ratio is 11.26, and wherein sodium content (Na 2 O) < 0.04% wt. See Table 1 for the treatment conditions of the S1 molecular sieve release agent under air conditions.

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Abstract

The invention relates to a method for removing a molecular sieve organic template, which mainly solves the problems of removing the molecular sieve template, excessively high operating temperature, or complicated equipment in the past. The present invention adopts the dielectric barrier discharge technology to carry out template release agent treatment to the molecular sieve containing organic template agent, select O 2 It is the working gas of the plasma. During the discharge process, free radicals with strong oxidation activity are generated. These free radicals are decomposed by the polymerization, substitution, electron transfer, bond breaking and other effects with the organic template, and are released in the gas state. Leaving the pores of the molecular sieve does not affect the crystal structure of the molecular sieve. The method has high efficiency and good effect for removing template agent, wide technical application range, low removal temperature, does not affect the crystal structure of molecular sieve, simple equipment and easy operation, and only consumes electric energy in the removal process, and the energy consumption is very low, so it can be used It is used in the removal treatment of molecular sieve organic templates.

Description

technical field [0001] The invention relates to a method for removing an organic template of a molecular sieve, in particular to a new method for obtaining a high-quality molecular sieve by removing the organic template at low temperature, simply and quickly. Background technique [0002] Zeolite molecular sieve materials have attracted much attention because of their large specific surface area and controllable pore size, and their broad application prospects in catalysis, adsorption, separation, special material preparation, feed, soil improvement, biomedicine and other fields. Zeolite molecular sieve materials are generally prepared by hydrothermal, sol-gel and other methods under the guidance of organic templates. Separating the template from the inorganic framework is an essential step to obtain an ordered pore structure and a large specific surface area. The template agent in the zeolite molecular sieve material is usually removed by roasting at high temperature. Alt...

Claims

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Application Information

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IPC IPC(8): C01B39/04
Inventor 郭宏利李晓韬左煜赵申朱志焱
Owner CHINA PETROLEUM & CHEM CORP
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