Metal modified nano HZSM-5 molecular sieve catalyst, preparation method and application thereof

A metal modification, molecular sieve technology, applied in molecular sieve catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problems of low selectivity, poor economy, and complicated modification methods.

Inactive Publication Date: 2019-06-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The methanol-to-aromatics method described above has the phenomenon of low aromatics mass yield and low aromatics selectivity in the one-stage reaction. At the same time, there is a situation of reaction feed coupling, and auxiliary carrier gas needs to ...

Method used

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  • Metal modified nano HZSM-5 molecular sieve catalyst, preparation method and application thereof
  • Metal modified nano HZSM-5 molecular sieve catalyst, preparation method and application thereof
  • Metal modified nano HZSM-5 molecular sieve catalyst, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0062] When using the ion exchange method, the following steps are included:

[0063] 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, the quality of aluminum source is 0.297g, the H of weighing 10g 2 O and the template agent M are prepared into a template agent solution, after mixing evenly, keep stirring in a water bath at 30°C for 30min; another part of the water and 0.297g of NaAlO 2 (i.e. aluminum source) is formulated into an aluminum source solution, the aluminum source solution is added to the template solution, after mixing evenly, keep stirring in a 30°C water bath for 30 minutes to obtain the first mixed material; finally, the silicic acid Tetraethyl ester (i.e. silicon source) 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;

[0064] Step 2), hydrothermal crystalli...

Embodiment 2

[0069] When using the excess impregnation method, the following steps are included:

[0070] 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, the quality of aluminum source is 0.297g, the H of weighing 10g 2 O and the template agent M are prepared into a template agent solution, after mixing evenly, keep stirring in a water bath at 30°C for 30min; another part of the water and 0.297g of NaAlO 2 (i.e. aluminum source) is formulated into an aluminum source solution, the aluminum source solution is added to the template solution, after mixing evenly, keep stirring in a 30°C water bath for 30 minutes to obtain the first mixed material; finally, the silicic acid Tetraethyl ester (i.e. silicon source) 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;

[0071] Step 2), hydrothermal cr...

Embodiment 3

[0076] When the equal volume impregnation method is used, the following steps are included:

[0077] 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, the quality of aluminum source is 0.297g, the H of weighing 10g 2 O and the template agent M are prepared into a template agent solution, after mixing evenly, keep stirring in a water bath at 30°C for 30min; another part of the water and 0.297g of NaAlO 2 (i.e. aluminum source) is formulated into an aluminum source solution, the aluminum source solution is added to the template solution, after mixing evenly, keep stirring in a 30°C water bath for 30 minutes to obtain the first mixed material; finally, the silicic acid Tetraethyl ester (i.e. silicon source) 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;

[0078] Step 2), hydroth...

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Abstract

The invention relates to a metal modified nano HZSM-5 molecular sieve catalyst, a preparation method and the application thereof. The preparation method of the metal modified nano HZSM-5 molecular sieve catalyst is characterized by comprising the following steps: adding the HZSM-5 molecular sieve catalyst as a carrier into a modified metal compound solution to form a turbid material; carrying outa water bath reaction of the turbid material under stirring to obtain a sticky precursor material; and drying and roasting the precursor material to obtain the metal modified nano HZSM-5 molecular sieve catalyst finally. By modifying the metal HZSM-5 molecular sieve catalyst with a metal, the metal modified nano HZSM-5 molecular sieve catalyst more suitable for methanol aromatization reaction is obtained, so that the highest selectivity of the methanol aromatization reaction reaches up to 36.76%.

Description

technical field [0001] The invention relates to the technical field of aromatic hydrocarbon production, in particular to a metal-modified nanometer HZSM-5 molecular sieve catalyst, its preparation method and application. Background technique [0002] In recent years, with the rapid development of the national economy, the demand for fine chemicals and the demand for high-octane gasoline in the fuel market have continued to grow, and aromatics play an important role as an important blending component of high-octane clean gasoline. Among the various aromatic hydrocarbon families, the light aromatic hydrocarbons benzene, toluene and xylene (BTX) have a wider range of uses and are important raw materials for modern basic organic chemicals, synthesis and fine chemicals. At present, aromatics mainly come from petroleum-based routes. With the increasing shortage of petroleum resources in the world, the price of BTX remains high, which has seriously affected the development of relat...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/44B01J29/46B01J35/10B01J37/30B01J37/02C07C1/20C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 李建伟毛庆张艳君张佳瑾
Owner BEIJING UNIV OF CHEM TECH
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