System and process for preparing olefin from oxygen-contained compound for reducing catalyst coking

A compound and catalyst technology, applied in the field of organic oxygen-containing compounds, can solve the problems of rapid coking on the surface of the catalyst

Active Publication Date: 2013-11-13
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Therefore, there is an urgent need for a practical and simple solution to the problem of rapid coking of the catalyst surfa

Method used

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  • System and process for preparing olefin from oxygen-contained compound for reducing catalyst coking
  • System and process for preparing olefin from oxygen-contained compound for reducing catalyst coking
  • System and process for preparing olefin from oxygen-contained compound for reducing catalyst coking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] use figure 1 The system shown performs a methanol-to-olefins (MTO) conversion reaction in which the return of the regenerated catalyst to the reaction is controlled by adjusting the flow ratio of the high temperature regenerated catalyst into two vertical legs in the lower part of the regenerator (regenerated combustor) temperature in the container.

[0052] Open the catalyst flow control valve on the branch pipe with a partitioned heat exchanger inside, so that part of the high-temperature regenerated catalyst flowing out of the regenerator (regeneration combustion chamber) flows into the branch pipe with a partitioned heat exchanger inside, and is transferred by the partitioned wall The heat exchanger cools this part of the high temperature regenerated catalyst.

[0053] The temperature of this part of the high-temperature regenerated catalyst cooled by the partition wall heat exchanger is reduced from 650 ° C to about 400 ° C, and the amount of this part of the cata...

Embodiment 2

[0057] use figure 1 The system shown performs methanol (MTO) to olefins conversion reaction, where the temperature at which the regenerated catalyst is returned to the reactor is controlled by adjusting the heat exchange duty of the dividing wall heat exchanger arranged in the above branch.

[0058] Open the catalyst flow control valve on the branch pipe with a partitioned heat exchanger inside, so that part of the high-temperature regenerated catalyst flowing out of the regenerator (regeneration combustion chamber) flows into the branch pipe with a partitioned heat exchanger inside, and is transferred by the partitioned wall The heat exchanger cools this part of the high temperature regenerated catalyst.

[0059] Adjust the flow rate of the cooling medium in the partition heat exchanger, and gradually increase the cooling load, so that part of the high-temperature regenerated catalyst from the regenerator (regeneration combustion chamber) is cooled in the partition heat excha...

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PUM

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Abstract

The invention discloses a system for preparing olefin from an oxygen-contained compound for reducing catalyst coking. The system comprises at least one reactor, at least one regenerator, at least one deactivated catalyst conveying pipeline and at least one regenerated catalyst conveying pipeline, wherein a part, close to the regenerator, of the regenerated catalyst conveying pipeline comprises at least two branch pipes, a part, close to the reactor, of the regenerated catalyst conveying pipeline comprises at least one guide pipe, the branch pipes are communicated with the guide pipe, at least one of the branch pipes is provided with at least one indirect heat exchanger for cooling a regenerated catalyst entering into the branch pipe, and the cooled regenerated catalyst is mixed with the regenerated catalyst from other branch pipes in a connecting area between the branch pipe and the guide pipe and enters into the reactor through the guide pipe, so as to prevent overtemperature of the regenerated catalyst entering into the reactor and prevent the surface of the regenerated catalyst from being quickly carbonized when the regenerated catalyst is in contact with the oxygen-contained compound in the reactor.

Description

technical field [0001] The present invention relates to a system and process for producing olefins from organic oxygen-containing compounds, such as methanol and / or dimethyl ether, in particular, to a system and process for producing olefins from organic oxygen-containing compounds with reduced catalyst coking. Background technique [0002] The technology of organic oxygen-containing compounds, such as methanol and / or dimethyl ether to olefins, has opened up a new process route for the production of basic organic chemical raw materials from coal, and the typical technology is methanol to olefins (MTO). Generally speaking, the MTO technology package consists of reaction technology and separation technology. Reaction technology is centered on catalyst development and reactor development and design, and methanol is used as raw material to produce olefin mixture; while product distribution and purity requirements are the basis for developing separation processes. [0003] The M...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C11/02
CPCY02P20/584
Inventor 门卓武王向辉翁力徐明李国涛朱伟平
Owner CHNA ENERGY INVESTMENT CORP LTD
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