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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

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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 be added. Therefore, in the modified method There are common problems such as complicated operation, high energy consumption, and poor economy, and there are also problems such as low selectivity, poor efficiency, and high cost in the methanol aromatization reaction

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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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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