Catalyst for converting aromatic hydrocarbon from alcohol ether, and preparation method and application method thereof

A technology for catalysts and aromatic hydrocarbons, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of catalyst activity decline, easy sintering of metal components, loss of active components, etc. The effect of alleviating the loss of metal components and improving the degree of dispersion

Active Publication Date: 2013-11-27
HUADIAN COAL IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that in the aromatization process of methanol or dimethyl ether, the high temperature hydrothermal environment will reduce the activity of the catalyst. A chemical reaction occurs to generate inactive metal compounds, resulting in the gradual loss of active components
In addition, when a higher content of metal components is loaded by impregnation, the metal components are not easy to disperse, and the metal components are easy to sinter during the calcination process, thereby affecting the catalyst activity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First prepare zinc nitrate, lanthanum nitrate and diammonium hydrogen phosphate into a mixed precursor aqueous solution, wherein the mass ratio of zinc nitrate: lanthanum nitrate: diammonium hydrogen phosphate: water is 5:2:3:90, and 10% of the mixed The aqueous precursor solution is impregnated on the ZSM-5 molecular sieve to obtain a modified ZSM-5 molecular sieve; the aluminum sol is mixed with the above-mentioned modified ZSM-5 molecular sieve to prepare a slurry, wherein the mass ratio of the aluminum sol to the modified ZSM-5 molecular sieve is is 75:25, the mass concentration of aluminum sol is 10%; by the method of spray granulation, composite particles with an average particle diameter of 60 μm are prepared; -1 Under the condition of 10% by volume of the composite particles, the water vapor was treated for 10 hours; 30% of the above mixed precursor aqueous solution was taken, and the composite particles after water vapor treatment were immersed in the solution f...

Embodiment 2

[0026] Silver nitrate, gallium nitrate, cerium nitrate and diammonium hydrogen phosphate are first prepared into a mixed precursor aqueous solution, wherein the mass ratio of silver nitrate: gallium nitrate: cerium nitrate: diammonium hydrogen phosphate: water is 10:15:10:15 : 50; Get 30% mixed precursor aqueous solution and impregnate on ZSM-11 molecular sieve, obtain modified ZSM-11 molecular sieve; Silica sol is mixed with above-mentioned modified ZSM-11 molecular sieve, is mixed with slurry, wherein silica sol and modified The mass ratio of ZSM-11 molecular sieve is 60:40, and the mass concentration of silica sol is 50%; through the method of spray granulation, composite particles with an average particle diameter of 80 μm are prepared; The speed is 0.1h -1 Under the condition of 100% water vapor treatment for 0.5h; taking 20% ​​of the above mixed precursor aqueous solution, the composite particles after water vapor treatment were immersed in the solution for 2h, and at 12...

Embodiment 3

[0029] First, zinc carbonate, ammonium molybdate, ammonium paratungstate and barium nitrate are formulated into a mixed precursor aqueous solution, wherein the mass ratio of zinc carbonate: ammonium molybdate: ammonium paratungstate: barium nitrate: water is 5:6:6:3:80; 40% of the mixed precursor aqueous solution is impregnated on ZSM-5 and ZSM-11 mixed molecular sieves to obtain modified ZSM-5 and ZSM-11 mixed molecular sieves; the nitric acid solution of pseudo-boehmite is mixed with the aforementioned modified molecular sieves, It is prepared into a slurry, wherein the mass ratio of the nitric acid solution of pseudo-boehmite to the mixed molecular sieve is 77:23, and the mass fraction of pseudo-boehmite in the nitric acid solution of pseudo-boehmite is 20%; The forming method is to prepare composite particles with an average diameter of 3 mm. The composite particles were heated at 600°C with a volumetric space velocity of 1.5h -1Under the condition of 50% of the volume pe...

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Abstract

The invention relates to a catalyst for converting aromatic hydrocarbon from alcohol ether, and a preparation method and application method thereof. The catalyst is composed of molecular sieve, metal component, structural reinforcer and stability assistant. The preparation method comprises the following steps: preparing the molecular sieve, metal component, structural reinforcer and stability assistant into composite granules, treating with steam, impregnating the metal component and stability assistant, and repeating the steam treatment and impregnation many times to load the required metal component and stability assistant component in batches. The application method comprises the following step: reacting raw materials alcohol and ether at 350-550 DEG C under the pressure of 0-3 MPa, wherein the weight hourly space velocity of the reaction raw materials is 0.1-20 h<-1>. The catalyst provided by the invention can effectively reduce metal component loss in a high-temperature hydrothermal environment, and avoids metal sintering due to excessive loading of metal component at one time since the metal component dispersity is good.

Description

technical field [0001] The invention belongs to the technical field of preparation of aromatic hydrocarbons, and in particular relates to a catalyst for converting alcohol ethers into aromatic hydrocarbons, a preparation method and a use method thereof. Background technique [0002] Aromatics (especially benzene (B), toluene (T) and xylene (X)) are important basic organic chemical raw materials with high added value. Their consumption is second only to ethylene and propylene, and their annual consumption reaches thousands More than 10,000 tons. Aromatics in my country mainly come from petrochemicals such as catalytic reforming and pyrolysis gasoline, and the shortage of petroleum resources in my country has led to insufficient supply of aromatics in the market, a large amount of dependence on imports, and high prices. Compared with petroleum resources, my country's coal resources are relatively rich. In recent years, my country's new coal chemical technology has developed r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/44B01J29/80B01J29/42B01J29/48B01J37/10C07C15/02C07C1/20
Inventor 黄晓凡王彤汤效平骞伟中魏飞高长平丁焕德
Owner HUADIAN COAL IND GRP
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