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Method for producing aromatic hydrocarbon from methanol

A technology for methanol and aromatics, applied in the production of aromatics and the production of aromatics from methanol, can solve the problems of reducing the conversion rate of methanol to aromatics, reducing the aromatization reaction, and being unfavorable for the aromatization reaction, etc.

Pending Publication Date: 2020-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments have shown that methanol releases a large amount of heat during direct aromatization, which is not conducive to the progress of the aromatization reaction but also increases the coke content, which not only reduces the conversion rate of methanol to aromatics, but also causes catalyst loss due to coke content. Live to further reduce the possibility of aromatization

Method used

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  • Method for producing aromatic hydrocarbon from methanol
  • Method for producing aromatic hydrocarbon from methanol
  • Method for producing aromatic hydrocarbon from methanol

Examples

Experimental program
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Effect test

Embodiment 1

[0070] The method for producing aromatics from methanol in this embodiment includes the following steps:

[0071] 1) Formation of the first product

[0072] Raw material for the first reaction: methanol

[0073] Catalyst (carbon content less than 0.5%): ZSM-5 molecular sieve modified with zinc, and the mass fraction of zinc in ZSM-5 molecular sieve is 1%

[0074] The first reactor: a moving bed reactor

[0075] Specifically, the methanol and the catalyst are mixed in a moving bed reactor and then the first reaction is performed to generate the first product.

[0076] The temperature of the first reaction is 250°C, the pressure is 0.5Mpa, and the space velocity of methanol is 1 / h.

[0077] Among them, the first product includes dimethyl ether, water produced by methanol cracking, C1-C5 hydrocarbons, C6+ other hydrocarbons, and unreacted methanol.

[0078] In the first product, the mass fraction of dimethyl ether is 80%.

[0079] In the first product, the mass fraction of methanol is 20%.

[0...

Embodiment 2

[0092] The method for producing aromatics from methanol in this embodiment includes the following steps:

[0093] 1) Formation of the first product

[0094] Raw material for the first reaction: methanol

[0095] Catalyst (carbon content less than 0.5%): ZSM-5 molecular sieve modified with zinc and gallium, and the mass fraction of zinc in ZSM-5 molecular sieve is 2%, and the mass of gallium in ZSM-5 molecular sieve The score is 1%

[0096] The first reactor: a moving bed reactor

[0097] Specifically, the methanol and the catalyst are mixed in a moving bed reactor and then the first reaction is performed to generate the first product.

[0098] The temperature of the first reaction is 220°C, the pressure is 0.5Mpa, and the space velocity of methanol is 2 / h.

[0099] Among them, the first product includes dimethyl ether, water produced by methanol cracking, C1-C5 hydrocarbons, C6+ other hydrocarbons, and unreacted methanol.

[0100] In the first product, the mass fraction of dimethyl ether ...

Embodiment 3

[0114] The method for producing aromatics from methanol in this embodiment includes the following steps:

[0115] 1) Formation of the first product

[0116] Raw material for the first reaction: methanol

[0117] Catalyst (carbon content less than 0.5%): ZSM-5 molecular sieve modified with silver and boron, and the mass fraction of silver in ZSM-5 molecular sieve is 1%, and the mass of boron in ZSM-5 molecular sieve The score is 5%

[0118] The first reactor: a moving bed reactor

[0119] Specifically, the methanol and the catalyst are mixed in a moving bed reactor and then the first reaction is performed to generate the first product.

[0120] The temperature of the first reaction is 270°C, the pressure is 2Mpa, and the space velocity of methanol is 4 / h.

[0121] Among them, the first product includes dimethyl ether, water produced by methanol cracking, C1-C5 hydrocarbons, C6+ other hydrocarbons, and unreacted methanol.

[0122] In the first product, the mass fraction of dimethyl ether is...

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Abstract

The invention provides a method for producing aromatic hydrocarbon from methanol, which comprises the following steps: 1) carrying out a first reaction on methanol in the presence of a catalyst to produce a first product; then adding a diluent to carry out a second reaction to obtain a second product; and 2) carrying out separation treatment on the second product to obtain the aromatic hydrocarbon, wherein the first product comprises dimethyl ether. According to the method, methanol is firstly converted into dimethyl ether, and then the aromatic hydrocarbon is further prepared from the reactant containing dimethyl ether, so that the heat in the whole reaction process is more controllable. By means of the method, the problem that the aromatization reaction is difficult to carry out normallydue to the fact that a large amount of heat is generated during the direct aromatization reaction of methanol is avoided.

Description

Technical field [0001] The invention relates to a method for producing aromatic hydrocarbons, in particular to a method for producing aromatic hydrocarbons from methanol, and belongs to the technical field of coal chemical industry applications. Background technique [0002] Aromatics, as a basic raw material for the petrochemical industry, play an important role in my country's modern national economy. Among them, benzene, toluene and xylene, as the three most basic light aromatic compounds (BTX), can be used to synthesize a series of chemical products such as plastics, fibers, and rubber. Currently, about 97% of the world’s aromatics are produced through traditional petroleum routes. Taking into account my country's characteristic energy structure of "rich coal, lack of oil, and less gas", it is very important to develop a new technology that uses coal resources to replace petroleum resources to produce aromatics. [0003] Coal chemical industry uses coal as raw material to gas...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C15/04C07C15/06C07C41/09C07C43/04B01J29/40
CPCC07C1/20C07C41/09B01J29/405B01J2229/18Y02P20/52
Inventor 冯丽梅徐亚荣蒋斌波
Owner PETROCHINA CO LTD
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