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Reaction device, and method for producing epsilon-caprolactam

A technology of a reaction device and a reactor, which can be applied to the preparation of lactams, chemical instruments and methods, and organic chemical methods, etc., can solve problems such as the reduction of catalyst activity.

Active Publication Date: 2014-09-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is a problem that the catalytic activity decreases with time due to the adhesion of the coke component to the solid catalyst

Method used

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  • Reaction device, and method for producing epsilon-caprolactam

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Experimental program
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Effect test

Embodiment 1

[0203] The powder of the solid catalyst with reduced catalytic activity was introduced into the regenerator, and heated air was supplied from the lower part of the regenerator to heat the temperature inside the regenerator to about 430° C. to fluidize the powder. In order to maintain the powder pressure in the regenerator at about 120mmH 2 O, the powder is continuously introduced into the regenerator.

[0204] On the other hand, the powder regenerated in the regenerator is continuously transferred to the reactor by virtue of the powder pressure difference while adjusting the flow rate with the valve for the regenerated catalyst transfer piping. In order to prevent the gas supplied to the reactor from flowing into the regenerator and mixing with the gas supplied to the regenerator, the powder pressure in the regenerated catalyst transfer pipe is maintained at about 500mmH 2 O. In addition, in order to optimize the fluidity of the powder, heated N2 is supplied to the transfer ...

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Abstract

The present invention pertains to a reaction device containing: a fluidized bed type reactor for chemically reacting a starting gas in the presence of a solid catalyst; a fluidized bed type reproducer for reproducing a portion of the solid catalyst, of which the catalyst activity has declined due to being used in the reactor, such that the catalyst activity is recovered by heating the solid catalyst in an oxygen-containing gas atmosphere; and a pressure control unit for controlling the pressure within the reactor and / or the pressure within the reproducer such that the pressure within the reproducer becomes greater than the pressure within the reactor. According to the present invention, a reaction device capable of preventing rapid oxidation or a combustion reaction caused by mixing the reaction gas in the reactor and the reproduction gas in the reproducer is provided.

Description

technical field [0001] The present invention relates to a reaction device and a method for producing ε-caprolactam. [0002] this application claims priority based on Japanese Patent Application No. 2012-004131 for which it applied to Japan on January 12, 2012, The content is used here. Background technique [0003] Reactors are known which chemically react raw material gases in the presence of a solid catalyst. In this reactor, a so-called coke component (carbonaceous substance) adheres to the solid catalyst due to the polymerization of the raw material gas and the reaction gas. There is a problem that the catalyst activity decreases with time due to the adhesion of the coke component to the solid catalyst. [0004] For example, Patent Document 1 proposes a configuration in which this reactor is combined with a regenerator that restores the catalyst by heating a part of the solid catalyst whose catalyst activity has been lowered in the reactor and used in an oxygen-contai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/26B01J38/30C07B61/00C07D201/04C07D223/10
CPCB01J8/28B01J2219/00236B01J2208/00061B01J2208/00761B01J2208/00752B01J8/0055B01J2219/00213C07D223/10C07D201/04B01J8/0025B01J8/1809B01J2208/0007B01J2219/00234B01J8/003B01J2219/002B01J8/0035Y02P20/584
Inventor 横田雅志小林由典
Owner SUMITOMO CHEM CO LTD
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