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Method and apparatus for producing propylene

A propylene and reactor technology, which is applied in the field of propylene preparation and propylene preparation equipment, can solve the problems of catalyst degradation acceleration, catalyst deactivation, etc., and achieve the effects of reduced filling volume, prolonged regeneration cycle, and reduced equipment costs

Active Publication Date: 2009-08-12
JGC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there is a problem that the catalyst is deactivated (permanent deactivation) which cannot be regenerated, and the deterioration of the catalyst in the reactor is accelerated.

Method used

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  • Method and apparatus for producing propylene
  • Method and apparatus for producing propylene
  • Method and apparatus for producing propylene

Examples

Experimental program
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preparation example Construction

[0030] figure 1 It is an explanatory diagram showing the outline of the production apparatus for propylene of the present invention and the flow of the production method using the production apparatus.

[0031] In this embodiment, the production apparatus 10 of propylene has a reactor 11 , a separator 12 and an oligomerizer 13 . The reactor 11 is filled with a catalyst, and the raw material dimethyl ether / methanol, the low boiling point compound having a boiling point below -50°C and the hydrocarbons with 4 to 6 carbon atoms, which are refluxed from the separator 12 described later, are oligomerized The hydrocarbons having 4 to 10 carbon atoms supplied from the vessel 13 react to produce a reaction product containing propylene.

[0032] In the separator 12, the reaction product containing propylene obtained in the reactor 11 is separated and purified, and propylene, propane, heavy components, water, low-boiling compounds with a boiling point below -50°C, and carbon atoms are ...

Embodiment 1

[0057] Mixed dimethyl ether (flow rate is 1200Ncm 3 / hour), methane (flow rate is 600Ncm 3 / hour), nitrogen (flow rate is 600Ncm 3 / hour), and the mixed gas is sent to the constant temperature reactor filled with HCaMFI catalyst, and it is reacted at a temperature of 530° C. under normal pressure. The weight hourly space velocity (WHSV), which is the feed amount ratio of the raw material dimethyl ether (DME) to the catalyst, was set to 9.6 g-DME / (g-catalyst·hour). Then, the yields and conversions of hydrocarbons having 2 or less carbon atoms, propylene, propane, and hydrocarbons having 4 or more carbon atoms relative to the total amount of dimethyl ether (DME) supplied were measured.

Embodiment 2

[0059] Mixed dimethyl ether (flow rate is 1200Ncm 3 / hour), ethylene (flow rate is 600Ncm 3 / hour), nitrogen (flow rate is 600Ncm 3 / hour), and the mixed gas is sent to the constant temperature reactor filled with HCaMFI catalyst, and it is reacted at a temperature of 530° C. under normal pressure. The weight hourly space velocity (WHSV), which is the feed amount ratio of the raw material dimethyl ether (DME) to the catalyst, was set to 9.6 g-DME / (g-catalyst·hour). Then, the yields and conversions of hydrocarbons having 2 or less carbon atoms, propylene, propane, and hydrocarbons having 4 or more carbon atoms relative to the total amount of dimethyl ether (DME) supplied were measured.

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Abstract

A process for producing propylene, comprising the steps of: feeding at least one member selected from dimethyl ether and methanol into a reactor to cause the reaction in the presence of a catalyst; feeding a reaction product produced in the reactor into a separator to separate a low-boiling-point compound having a boiling point of -50 DEG C or lower under atmospheric pressure from the reaction product by the separator; and refluxing 70% or more of the entire amount of the low-boiling-point compound into the reactor.

Description

technical field [0001] The invention relates to a method for preparing propylene from dimethyl ether and / or methanol through dehydration condensation reaction and a device for preparing propylene. [0002] This application claims priority based on Japanese Patent Application No. 2006-264514 for which it applied in Japan on September 28, 2006, and uses the content for this application. Background technique [0003] Currently, the need for a selective production increase process for propylene is increasing due to differences in the expansion of demand for ethylene and propylene, and an increase in the supply rate of ethylene due to the expansion of ethane crackers in the Middle East. As a method for producing such propylene, there is known a method of supplying dimethyl ether (DME) or methanol to a reactor having a zeolite catalyst to prepare a reactant containing propylene, and separating propylene from the reactant. [0004] It is known that when the reaction product contai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/24C07C11/06
CPCC07C2523/02C07C2529/40C07C2/06C07C1/20Y02P20/52C07C11/06
Inventor 伊藤浩文吉田次郎船津秀一大山弘二近松伸康
Owner JGC CORP
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