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A kind of methanol aromatization catalyst and its preparation method and application

A catalyst and aromatization technology, applied in the field of methanol aromatization catalyst and its preparation, to achieve the effect of improving yield and stability, and improving aromatization performance

Inactive Publication Date: 2018-06-26
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still needs and room for improvement in the aromatics yield and catalyst stability of the existing MTA catalysts.

Method used

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  • A kind of methanol aromatization catalyst and its preparation method and application
  • A kind of methanol aromatization catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example is used to illustrate the methanol aromatization catalyst and its preparation method. Specifically, the preparation method of methanol aromatization catalyst comprises the following steps:

[0040] (1) Weigh 25 g of H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 25 and 5 g of H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 90, place them in a reaction kettle, and mix them evenly.

[0041] (2) The first metal modification element precursor Zn(NO 3 ) 2 ·6H 2 O and the second metal modifying element precursor AgNO 3 Dissolve in 150ml of deionized water, then dropwise add 4.6ml of 15% ammonia water, and stir at room temperature for 0.5h to obtain a mixed solution of the metal modifying element precursor and ammonia water; wherein, the sum of the mass of Zn and Ag elements accounts for 1% of the molecular sieve 2wt%, and Zn(NO 3 ) 2 and AgNO 3 The molar ratio of the substances is 1:0.5.

[0042] (3) Add the mixture of metal modifying e...

Embodiment 2

[0046] This example is used to illustrate the methanol aromatization catalyst and its preparation method. Specifically, the preparation method of methanol aromatization catalyst comprises the following steps:

[0047] (1) Weigh 26 g of H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 37 and 4 g of H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 80, place them in a reaction kettle, and mix them evenly.

[0048] (2) The first metal modification element precursor Zn(NO 3 ) 2 ·6H 2 O and the second metal modifying element precursor La(NO 3 ) 3 ·6H 2 O was dissolved in 150ml deionized water, and stirred at room temperature for 0.5h to obtain a metal modification element precursor mixed solution; wherein, the sum of the mass of Zn and La elements accounted for 3.0wt% of the molecular sieve, and Zn(NO 3 ) 2 and La(NO 3 ) 3 The amount ratio of the substances is 1:0.3.

[0049] (3) Add the metal modifying element precursor solution obtained in step (2) into t...

Embodiment 3

[0053] This example is used to illustrate the methanol aromatization catalyst and its preparation method. Specifically, the preparation method of methanol aromatization catalyst comprises the following steps:

[0054] (1) Weigh 20 g of H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 37 and 10 g of H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 80, place them in a reaction kettle, and mix them evenly.

[0055] (2) The first metal modification element precursor Ga 2 (SO 4 ) 3 16H 2 O and the second metal modifying element precursor Ce(NO 3 ) 3 ·6H 2 O was dissolved in 150ml of deionized water and stirred at room temperature for 0.5h to obtain a mixed solution of metal modifying element precursors; wherein, the sum of the mass of Ga and Ce elements accounted for 2.5wt% of the molecular sieve, and Ga 2 (SO 4 ) 3 and Ce(NO 3 ) 3 The material ratio of the material is 1:0.4 (that is, the material ratio of the Ga element to the Ce element is 1:0.2).

[0...

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Abstract

The invention provides a methanol aromatized catalyst. The catalyst comprises (1) an H-ZSM-5 molecular sieve mixture and (2) a metal modified element loaded on the H-ZSM-5 molecular sieve mixture, wherein the H-ZSM-5 molecular sieve mixture comprises an H-ZSM-5 first molecular sieve with a silicon-aluminum ratio of 18 to 75, and an H-ZSM-5 second molecular sieve with a silicon-aluminum ratio of 76 to 300, and the mass ratio of the H-ZSM-5 first molecular sieve to the H-ZSM-5 second molecular sieve is 1:(0.02 to 1); the metal modified element comprises a first metal modified element and a second metal modified element, wherein the first metal modified element is selected from Zn and Ga and the second metal modified element is selected from Ag, La, Cu, Ce, Mg, Cd, Fe and Mo; by the mass of metal elements, the mass sum of the first metal modified element and the second metal modified element is 0.1 percent to 8 percent of that of the H-ZSM-5 molecular sieve mixture and the ratio of amount of substance of the first metal modified element to the second metal modified element is 1:(0.1 to 1). The invention further relates to a preparation method of the methanol aromatized catalyst and application of the methanol aromatized catalyst to preparation of benzene, toluene and xylene.

Description

technical field [0001] The present invention relates to a methanol aromatization catalyst for preparing aromatic hydrocarbons and its preparation method and application, and in particular to a methanol aromatization catalyst for preparing benzene, toluene or xylene from methanol, its preparation method and application . Background technique [0002] Benzene, toluene, and xylene (BTX) in aromatics are important basic raw materials for petrochemicals, and are widely used in many fields such as energy, transportation, materials, pesticides, and daily chemicals. Aromatics in my country are mainly prepared by catalytic reforming of petroleum and hydrogenation extraction of pyrolysis gasoline, which are heavily dependent on petroleum resources. With the shortage of oil resources in my country and the further increase of foreign dependence, the limitations of traditional aromatics production processes are highlighted, and it is urgent to find a new aromatics production process tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40B01J29/44B01J29/80C07C1/20C07C15/02C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 李春启李德炳陈爱平陈元应冯巍梅长松
Owner DATANG INT CHEM TECH RESINST
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