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Separation column body for reaction distillation

A technology of reactive distillation and separation tower, applied in fractionation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex process and high energy consumption

Active Publication Date: 2014-01-22
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 requires two towers, a reactive distillation tower and a product separation tower, and there are problems of complex flow and high energy consumption. A new reactive distillation separation tower body is provided. The method has the advantages of: The characteristics of simple process and low energy consumption

Method used

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  • Separation column body for reaction distillation
  • Separation column body for reaction distillation
  • Separation column body for reaction distillation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] according to figure 1 In the epichlorohydrin production process shown, the number of theoretical plates in the public rectification section is 10, the number of theoretical plates in the common stripping section is 15, the separation efficiency of the reaction section is equivalent to 25 theoretical plates, and the number of theoretical plates in the rectification section on the production side is for 25. The catalyst loaded in the reaction section is SiO 2 / TiO 2 The titanium-silicon molecular sieve with a molar ratio of 80, 30% by weight of hydrogen peroxide and methanol mixture (70% by weight of methanol content) enters the first theoretical plate of the reaction section with a flow rate of 1.00 g / min (numbered from top to bottom, the same below), Allyl chloride enters from the bottom of the reaction section with a flow rate of 2.00 g / min, and the top of the tower is fully refluxed. The side line is extracted from the 10th theoretical plate of the separation secti...

Embodiment 2

[0020] according to figure 1 The reactive distillation separation tower shown in the figure has a theoretical plate number of 5 in the common rectification section and 10 theoretical plates in the common stripping section. The separation efficiency of the catalytic reaction section is equivalent to a theoretical plate number of 15. The number is 15, the number of theoretical plates in the rectifying section on the feed side is 4, and the number of theoretical plates in the rectifying section on the feed side is 6. The catalyst is SiO 2 / TiO 2 Titanium-silicon molecular sieve with a molar ratio of 80, 30% by weight hydrogen peroxide and methanol mixture (methanol content 70% by weight) enters the first theoretical plate of the reaction section with a flow rate of 1.00 g / min (numbered from top to bottom, the same below), allyl chloride It enters from the bottom of the catalytic reaction section at a flow rate of 2.00 g / min, and the top of the tower is fully refluxed. The side...

Embodiment 3

[0022] according to figure 1 In the epichlorohydrin production process shown, the number of theoretical plates in the public rectification section is 3, the number of theoretical plates in the public stripping section is 5, the separation efficiency of the reaction section is equivalent to the number of theoretical plates being 5, and the number of theoretical plates in the rectification section on the production side is 5. for 5. The catalyst loaded in the reaction section is SiO 2 / TiO 2 Titanium-silicon molecular sieve with a molar ratio of 60, 2% by weight of hydrogen peroxide and ethyl acetate mixture (50% by weight of ethyl acetate content) enters the first theoretical plate of the reaction section with a flow rate of 1.00 g / min. The minute flow enters from the bottom of the catalytic reaction section, the top of the tower is fully refluxed, the side line is extracted from the third theoretical plate of the partition section at 5.48 g / min, and the rest is extracted fr...

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Abstract

The invention relates to a separation column body for reaction distillation. The separation column body is mainly used for solving the problems that two columns (a reaction distillation column and a product partition column) are necessary for realization of the traditional reaction distillation process, and the procedure is complicated. In order to preferably solve the problems, the technical scheme is as follows: the separation column body comprises a material feed inlet, a column-top feed inlet, a column-top feed outlet, a column-bottom feed inlet, a column-bottom feed outlet, a side-line extraction feed outlet, division boards, a common rectifying section, a reaction section, an extraction-side rectifying section and a common stripping section, wherein the feed side can be provided with a rectifying section and / or a stripping section; the separation column body for the reaction distillation is divided into the common rectifying section, a feed-side rectifying section, the reaction section, a feed-side stripping section, the extraction-side rectifying section and the common stripping section by the division boards; in the section of reaction and distillation, the reaction section is located between the feed-side rectifying section and the feed-side stripping section, the feed-side rectifying section is located above the reaction section, and the feed-side stripping section is located below the reaction section; and the area between the tops of the division boards and the column-top feed inlet and the column-top feed outlet is the common rectifying section, the area between the bottoms of the division boards and the column-bottom feed inlet and the column-bottom feed outlet is the common stripping section, the other side of the material feed inlet in the area at which the division boards are located is the extraction-side rectifying section. The separation column body can be applied to industrial application for reaction distillation.

Description

technical field [0001] The invention relates to a reactive distillation partition tower body. 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 require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01J8/02
Inventor 钟禄平肖剑张惠明
Owner CHINA PETROLEUM & CHEM CORP