Method for preparing aromatic hydrocarbons through efficient conversion of methanol

A technology for methanol and aromatics, applied in the field of high-efficiency conversion of methanol to aromatics, which can solve the problems of hydrothermal deactivation of catalysts and low yield of aromatics, and achieve good technical effects

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the existing patented technologies all have the problems of severe hydrothermal deactivation of the catalyst and low yield of aromatics

Method used

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  • Method for preparing aromatic hydrocarbons through efficient conversion of methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The methanol raw material with a methanol mass percentage of 100% enters the fluidized bed reactor and the modified ZSM-5 catalyst at 440°C, the reaction gauge pressure is 0 MPa, and the methanol weight space velocity is 0.2 hours -1 The reaction product containing aromatic hydrocarbons and the catalyst to be generated are separated by the cyclone separator of the reactor, and the reaction product enters the subsequent separation system; the catalyst to be generated enters the riser regenerator and is contacted and regenerated with the regeneration medium I, and the obtained semi-regenerated The catalyst and flue gas I enter the riser regeneration cyclone which is connected to the riser regenerator, the separated semi-regenerated catalyst enters the second dense bed zone A to contact with the degassing medium I, and the separated flue gas I enters the subsequent flue gas system ; 20% of the semi-regenerated catalyst after degassing is returned to the riser regenerator, a...

Embodiment 2

[0037] According to the conditions and steps described in Example 1, the methanol raw material with a methanol mass percentage content of 10% entered the fluidized bed reactor and the catalyst at 550°C, the reaction gauge pressure was 1 MPa, and the methanol weight space velocity was 15 hours. -1 50% of the semi-regenerated catalyst after degassing returns to the riser regenerator, and 50% of the semi-regenerated catalyst after degassing enters the fast bed regenerator and is contacted and regenerated by regeneration medium II.

[0038] The height of the partition is 90% of the total height of the second-dense bed; the volume ratio of the second-dense bed A area and the second-dense bed B area is 1:1.

[0039] The temperature of the catalyst in the fast-bed regenerator was 700° C., the density of the catalyst bed was 110 kg / m3, and the catalyst residence time was 5 minutes.

[0040] The catalyst temperature in the riser regenerator was 600°C, the catalyst density was 50 kg / m3,...

Embodiment 3

[0046] According to the conditions and steps described in Example 1, the methanol raw material with a methanol mass percentage content of 98% entered the fluidized bed reactor and the catalyst at 490 ° C, the reaction gauge pressure was 0.3 MPa, and the methanol weight space velocity was 4 hours. -1 30% of the semi-regenerated catalyst after degassing returns to the riser regenerator, and 70% of the semi-regenerated catalyst after degassing enters the fast bed regenerator and is contacted and regenerated by regeneration medium II.

[0047] The height of the partition is 70% of the total height of the second-dense bed; the volume ratio of the second-dense bed area A and the second-dense bed area B is 0.8:1.

[0048] The temperature of the catalyst in the fast-bed regenerator was 650° C., the density of the catalyst bed was 180 kg / m3, and the catalyst residence time was 25 minutes.

[0049] The catalyst temperature in the riser regenerator was 570°C, the catalyst density was 82 ...

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Abstract

The invention relates to a method for preparing aromatic hydrocarbons through efficient conversion of methanol. A purpose of the present invention is mainly to solve the problems of low aromatic hydrocarbon yield and serious hydrothermal deactivation of the catalyst in the prior art. According to the technical scheme, a methanol raw material enters a fluidized bed reactor, and is subjected to a contact reaction with a modified ZSM-5 catalyst under the effective reaction conditions; a spent catalyst enters a riser regenerator, and is regenerated; the obtained semi-regenerated catalyst and fluegas I enter a riser regeneration cyclone separator connected to the riser regenerator; the separated semi-regenerated catalyst enters the zone A of a two-dense bed, and is degassed; the degassed semi-regenerated catalyst partially returns to the riser regenerator, and partially enters a fast bed regenerator and is regenerated; and the obtained regenerated catalyst enters the zone B of the two-dense bed and is degassed and the degassed regenerated catalyst enters the fluidized bed reactor. With the technical scheme, the problem in the prior art is well solved. The method of the present invention can be used in the industrial production of aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a method for efficiently converting methanol to prepare aromatic hydrocarbons. Background technique [0002] Aromatic hydrocarbons (especially triphenyl, benzene, toluene, xylene, or BTX) are important basic organic synthesis raw materials. Driven by the demand for downstream derivatives, the market demand for aromatics continues to grow. [0003] Catalytic reforming and steam cracking process are the main production processes of aromatic hydrocarbons, which belong to the production technology of petroleum route. my country is relatively rich in coal resources. With the successful development of high-efficiency, long-cycle methanol catalysts and large-scale methanol plant technologies in recent years, the production cost of coal-based methanol has been greatly reduced, which provides a cheap source of raw materials for the production of methanol downstream products (olefins, aromatics, etc.). Therefore, the preparation of ar...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C15/02
CPCC07C1/20C07C2529/40C07C15/02Y02P20/584
Inventor 李晓红齐国祯金永明俞志楠
Owner CHINA PETROLEUM & CHEM CORP
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