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Reactive distillation method

A technology of reactive distillation and reaction section, which is applied in the direction of distillation separation, separation methods, chemical instruments and methods, etc., and can solve problems such as high energy consumption and complicated process

Active Publication Date: 2013-12-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the current reactive distillation process needs two towers to realize the reactive distillation tower and the product separation tower, and there are problems of complicated process and high energy consumption. A new method of reactive distillation is provided, which has the advantages of simple process and low energy consumption

Method used

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Experimental program
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Effect test

Embodiment 1

[0017] according to figure 1 The reaction distillation separation tower shown is equipped with packing in the tower, the theoretical plate number of the public stripping section is 15, the separation efficiency of the reaction section is equivalent to the theoretical plate number of 18, the theoretical plate number of the rectifying section on the feed side is 5, and the theoretical plate number of the feed side extraction section is 5. The number of theoretical plates in the distillation section is 10, and the number of theoretical plates in the rectifying section on the production side is 25. Catalyst is sulfonic acid sodium salt type ion-exchange resin, and water enters the 1st theoretical plate (counting from top to bottom, hereinafter the same) of divided column reaction section with 2.32 g / min flow, methyl acetate flows from 3.00 g / min The bottom of the reaction section of the separation tower enters, the temperature at the top of the separation tower is controlled to b...

Embodiment 2

[0019] according to figure 1 In the shown reaction distillation separation tower, packing is installed in the tower, the number of theoretical plates in the common stripping section is 15, the separation efficiency of the reaction section is equivalent to 18 theoretical plates, and the number of theoretical plates in the rectification section on the production side is 25. Catalyst is sulfonic acid sodium salt type ion-exchange resin, and water enters the 1st theoretical plate (counting from top to bottom, hereinafter the same) of divided column reaction section with 2.32 g / min flow, methyl acetate flows from 3.00 g / min The bottom of the reaction section of the separation tower enters, and the temperature at the top of the production side of the separation tower is controlled to be 64.5°C, the reflux ratio is 8, and the output at the top of the tower is 1.30 g / min. After the operation is stable, the result obtained is the methanol content at the top of the production side. It ...

Embodiment 3

[0021] according to figure 1 The reaction distillation separation tower shown is equipped with trays, the number of theoretical plates in the common stripping section is 30, the separation efficiency of the reaction section is equivalent to 25 theoretical plates, the number of theoretical plates in the rectification section on the feed side is 15, and the number of theoretical plates in the feed side is 15. The number of theoretical plates in the stripping section is 20, and the number of theoretical plates in the rectifying section on the production side is 30. Catalyst is sulfonic acid sodium salt type ion-exchange resin, and water enters the 1st theoretical plate (counting from top to bottom, hereinafter the same) of divided column reaction section with 2.32 g / min flow, methyl acetate flows from 3.00 g / min The bottom of the reaction section of the separation tower enters, the temperature of the top of the separation tower is controlled to be 64.5°C, the reflux ratio is 1, ...

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Abstract

The invention relates to a reactive distillation method, which mainly solves the problems that a reactive distillation tower and a product separation tower are needed to implement the conventional reactive distillation process, processes are complicated and energy consumption is high. Reaction raw materials enter a raw material inlet of a reaction section of a reactive distillation separation tower and are subjected to component separation while reacting; inlet side tower top vapor is condensed and then totally refluxed; an extraction side tower top condenser connects an extraction side tower top inlet and an extraction side tower top outlet; after tower top outlet vapor is condensed, a first part is fed into the tower top inlet, and a second part serving as a product is extracted; a tower bottom reboiler connects a tower bottom inlet and a tower bottom outlet; one part of tower bottom outlet liquid enters the reboiler to be vaporized, the obtained vapor is fed into the tower bottom inlet, and the other part of tower bottom outlet liquid serving as a product is extracted; the reactive distillation separation tower comprises a reactive distillation separation tower body, an inlet side tower top condenser, the extraction side tower top condenser and the reboiler; the reactive distillation separation tower body comprises the raw material inlet, an inlet side tower top inlet, an inlet side tower top outlet, the extraction side tower top inlet, the extraction side tower top outlet, the tower bottom inlet, the tower bottom outlet, a separation plate, the reaction section, an extraction side rectifying section and a public stripping section; and a rectifying section and / or a stripping section can be arranged on the inlet side. Through the technical scheme, the problems are well solved, and the method can be used in the industrial application of reactive distillation.

Description

technical field [0001] The invention relates to a method for reactive distillation. Background technique [0002] Catalytic distillation technology is that the separation of reaction and product is carried out in the same catalytic distillation equipment, and the generated product is separated while the reaction is in progress, and the balance of the reaction is broken, so that the reaction tends to be complete and the conversion rate of the reactant is improved; in addition, the reaction The heat can be absorbed by the vaporization of the reaction materials, so the reaction temperature can be kept constant, the energy consumption can be greatly reduced, the process flow is simplified, and the investment is also greatly reduced. The catalytic distillation column generally consists of three sections: the upper part is the rectification section (the rectification section may not be provided when the quality requirements for the top product are not high or not required), the mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/00B01J8/02
Inventor 钟禄平肖剑
Owner CHINA PETROLEUM & CHEM CORP