Method for preparing olefin by dehydration of methanol

A technology for methanol dehydration and olefin production, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, sustainable manufacturing/processing, etc. Low-level problems, to achieve the effect of improving reaction separation efficiency, reducing wear, and reducing complexity

Active Publication Date: 2013-07-10
CHINA PETROCHEMICAL CORP +1
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the disadvantages of the prior art, such as low yield of olefins, easy carbonization and deactivation of the catalyst in the reaction process, etc., and proposes a new method for methanol dehydration to olefins. The method adopts a catalytic distillation reactor, a continuous reaction regeneration The device constitutes an MTP catalytic reaction system and two adiabatic fixed-bed reactors. Using the method of the present invention, the catalyst can be continuously reacted and regenerated, with less carbon deposition and high olefin yield

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing olefin by dehydration of methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] As shown in the figure, the raw material methanol 1 passes through the catalyst bed of catalytic distillation reactor 2 and heats it into steam, then enters the lower part of catalytic distillation reactor 2, and reacts with the shape-selective ZSM-5 zeolite molecular sieve catalyst. The reaction temperature is 200~280℃, preferably 210-250℃, and the weight hourly space velocity is 1~6h -1 , preferably 3~5h -1 . The unreacted methanol stream 3 and the water generated by the reaction in the catalytic distillation reactor 2 are respectively extracted from the side line of the catalytic distillation reactor 2, and the unreacted methanol stream 3 is mixed with the raw material methanol 1, and then enters the catalytic distillation reactor 2 for reaction, and the reaction product 2 The methyl ether stream 4 comes out from the top of the catalytic distillation reactor 2 and enters the lower part of the moving bed reactor 5, and contacts with the catalyst for catalytic reactio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing olefin by dehydration of methanol, which overcomes the shortcoming of low olefin yield in the prior art, the shortcoming that a catalyst is susceptible to inactivation due to carbonization during reaction and the like. The method provided by the invention comprises: heating the methanol to generate vapor; allowing the vapor to enter a catalytic distillation rector to contact with a zeolite molecular sieve (ZSM)-5 catalyst and react; allowing the reaction product to enter a moving-bed reactor to contact with the catalyst and react; separating the reaction products; after ethylene and propylene products are separated out, allowing a material flow containing C4 hydrocarbons and a material flow containing C5-C7 hydrocarbons to enter two fixed-bedrectors respectively to contact with the catalyst and react; regenerating the inactive catalyst in the moving-bed reactor by burning and then recycling the regenerative catalyst. The method provided by the invention has the advantages of high olefin yield, high catalyst activity and high stability.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing olefins by dehydrating methanol. Background technique [0002] Ethylene and propylene are important basic chemical raw materials with huge annual demand, and they are mainly obtained from petroleum processing at present. In recent years, the international oil price has been at a high level above US$50 / barrel. Our country's oil resources are limited, and more than 40% of the oil needed at present depends on imports. Therefore, the catalytic conversion of methanol produced from coal to ethylene and propylene has a good application prospect. [0003] The methanol-to-ethylene-based process (MTO for short) and the propylene-based process (MTP for short) are about to enter large-scale industrialization. German Luqi company has a number of MTP patents (EP448000, WO192190, WO20061364.33, DEl020050159232, etc.), and has completed the continu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/24C07C11/04C07C11/06B01J29/40
CPCY02P20/10Y02P20/52Y02P20/584
Inventor 魏小波韩海波刘丹禾郝代军俞安平李治张国良
Owner CHINA PETROCHEMICAL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap