A kind of hzsm-5 molecular sieve catalyst, its preparation method and application

A molecular sieve and catalyst technology, applied in the field of HZSM-5 molecular sieve catalyst, can solve the problems of HZSM-5 selectivity and unsatisfactory yield, and achieve the effect of reducing environmental pollution and difficulty of operation, friendly operating conditions, and simple synthesis method

Active Publication Date: 2020-12-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selectivity and yield of HZSM-5 prepared by this method in methanol aromatization are still unsatisfactory

Method used

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  • A kind of hzsm-5 molecular sieve catalyst, its preparation method and application
  • A kind of hzsm-5 molecular sieve catalyst, its preparation method and application
  • A kind of hzsm-5 molecular sieve catalyst, its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of HZSM-5 molecular sieve catalyst, comprises the following steps:

[0032] Step 1), preparation of gel: according to raw material silicon aluminum ratio Si:Al=8, templating agent M:Al 2 o 3 =6.8,H 2 O: Al 2 o 3 =1149 takes each raw material, fixes the quality of the aluminum source, weighs 10g of H 2 O and the template M are formulated into a template solution, and after mixing evenly, keep stirring in a water bath at 30° C. for 30 min; another part of the water and 0.297 g of the aluminum source (i.e. NaAlO 2 ) into an aluminum source solution, adding the aluminum source solution into the template solution, mixing evenly, and keeping stirring in a 30° C. water bath for 30 minutes to obtain the first mixed material; finally, the silicon source (i.e. Tetraethyl silicate) was added to the first mixed material, after mixing evenly, aging for 3 hours in a water bath at 30°C to obtain a gel material;

[0033] Step 2), hydrothermal crystalliz...

Embodiment 2

[0037] A kind of preparation method of HZSM-5 molecular sieve catalyst, comprises the following steps:

[0038] Step 1), preparation of gel: according to raw material silicon aluminum ratio Si:Al=13, templating agent M:Al 2 o 3 =6.8,H 2 O: Al 2 o 3 =1149 takes each raw material, fixes the quality of the aluminum source, weighs 10g of H 2 O and the template M are formulated into a template solution, and after mixing evenly, keep stirring in a water bath at 30° C. for 30 min; another part of the water and 0.297 g of the aluminum source (i.e. NaAlO 2 ) into an aluminum source solution, adding the aluminum source solution into the template solution, mixing evenly, and keeping stirring in a 30° C. water bath for 30 minutes to obtain the first mixed material; finally, the silicon source (i.e. Tetraethyl silicate) was added to the first mixed material, after mixing evenly, aging for 3 hours in a water bath at 30°C to obtain a gel material;

[0039] Step 2), hydrothermal crystal...

Embodiment 3

[0043] A kind of preparation method of HZSM-5 molecular sieve catalyst, comprises the following steps:

[0044] Step 1), preparation of gel: according to raw material silicon aluminum ratio Si:Al=25, templating agent M:Al 2 o 3 =6.8,H 2 O: Al 2 o 3 =1149 takes each raw material, fixes the quality of the aluminum source, weighs 10g of H 2 O and the template M are formulated into a template solution, and after mixing evenly, keep stirring in a water bath at 30° C. for 30 min; another part of the water and 0.297 g of the aluminum source (i.e. NaAlO 2 ) into an aluminum source solution, adding the aluminum source solution into the template solution, mixing evenly, and keeping stirring in a 30° C. water bath for 30 minutes to obtain the first mixed material; finally, the silicon source (i.e. Tetraethyl silicate) was added to the first mixed material, after mixing evenly, aging for 3 hours in a water bath at 30°C to obtain a gel material;

[0045] Step 2), hydrothermal crystal...

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Abstract

The invention relates to a HZSM-5 molecular sieve catalyst as well as a preparation method and application thereof. The HZSM-5 molecular sieve catalyst is characterized in that raw materials comprisean organic silicon source, an aluminum source, a template agent M and water, wherein the mol ratio of the silicon source to the aluminum source, namely SiO2 to Al2O3, is (10 to 200) to 1; the mol ratio of the template agent M to the aluminum source, namely M to the Al2O3, is (2 to 10) to 1; and the mol ratio of water to the aluminum source, namely H2O to Al2O3, is (1000 to 1200) to 1. The HZSM-5 molecular sieve involved in the invention has the beneficial effects that through optimized combination of a raw material formula and the preparation method, a preparation process is simple; operationconditions are environmentally friendly; the extreme conditions of high temperature, high pressure, high acid, high alkali and the like are not needed; environmental pollution and operation difficultyare reduced; the preparation method is an efficient, simple and convenient synthesis method; and the synthetic cost can be greatly reduced.

Description

technical field [0001] The invention relates to the field of catalyst materials, in particular to a HZSM-5 molecular sieve catalyst, its preparation method and application. Background technique [0002] ZSM-5 molecular sieve is widely used in the fields of catalysis, adsorption and separation due to its unique three-dimensional intersecting pore structure, large specific surface area and pore volume, good thermal stability and hydrothermal stability. In industry, HZSM-5 is usually synthesized by hydrothermal method. The general steps are as follows: put the raw materials such as silicon source, aluminum source, water, alkali and template agent into the crystallization kettle, age at a certain temperature to form gel, and then Crystallization at a certain temperature, and then NaZSM-5 was obtained through suction filtration, washing, drying and roasting, and finally HZSM-5 was obtained through ion exchange and roasting. The technological process is complicated, and a large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40B01J37/03B01J37/10B01J37/30B01J37/08B01J35/10C07C15/04C07C15/06C07C15/08C07C1/20
CPCY02P20/52
Inventor 李建伟毛庆张艳君张佳瑾
Owner BEIJING UNIV OF CHEM TECH
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