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Micro-channel reactor

A micro-channel reactor, micro-reactor technology, applied in chemical/physical/physical-chemical reactors, chemical instruments and methods, chemical/physical/physical-chemical processes, etc., can solve the problem of small liquid holding volume, increased by-products, Improve enterprise costs and other issues, to achieve the effect of reducing process reaction conditions, improving mass transfer and heat transfer efficiency, and reducing enterprise costs

Pending Publication Date: 2022-03-04
山东科加工业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the production and R&D process of a chemical plant to prepare a certain product, in the process of raw material reaction, it often encounters the problem that the raw material cannot be fully reacted due to the poor mixing effect of the raw material. In this case, high temperature and high pressure is generally required. conditions, and more by-products
Therefore, in the process of production and research and development, by-products may produce dangerous substances, and due to insufficient reaction, excessive polluting substances will be produced on the air and water environment, which will bring greater environmental protection pressure to enterprises
Due to insufficient reaction, the yield is low, resulting in low production efficiency and increased enterprise costs
Similarly, in the research and development process, the reaction conditions are harsh and difficult to achieve, the by-products increase, and the research and development cycle becomes longer
[0004] The existing tank reactor is easy to operate and can realize batch production, but the mass transfer and heat transfer effect is poor, making continuous production difficult
Tubular reactors can be operated continuously, but the liquid holding volume is small, and the microscopic mixing and mass transfer is poor, especially for multi-phase systems, it is difficult to scale up mass production
[0005] Existing RTB microreactor, RTB microreactor flow channel adopts high-performance reaction equipment in the form of rectangular microchannel, but has poor heat transfer performance, and is not suitable for reactions with solids or participation
The existing dynamic tubular reactor is a plug-flow reactor. Compared with the tank reactor, the backmixing is small, but the mass transfer and heat exchange efficiency is relatively poor. It is a dynamic equipment, and the guarantee conditions and maintenance higher demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1—nitration reaction

[0061] The reaction formula is as follows:

[0062]

[0063] The disadvantages of nitration reaction are: large heat release, violent reaction, poor selectivity, many by-products, large amount of acid, and cumbersome post-treatment. The tank reactor and microreactor were used to carry out the nitration reaction respectively, and the reaction conditions and effects are shown in Table 3.

[0064] Table 3 Comparison of Nitrification Reaction

[0065] Reactor form Acid dosage (eq) Reaction temperature / ℃ Reaction time Conversion rate / % selectivity / % kettle reaction 1.2 40-45 2h 99 95.2 microreactor 1.08 60 20s 99.8 98.8

[0066] Known by embodiment 1, the advantage of microchannel reactor is: control heat of reaction, shorten reaction time, improve selectivity and yield, reduce the consumption of acid, improve safety.

Embodiment 2

[0067] Embodiment 2—Grignard reaction

[0068] The reaction formula is as follows:

[0069]

[0070] The disadvantages of Grignard reaction are anhydrous and oxygen-free; low reaction temperature and large heat release; tank reaction is easy to get out of control, and the quality of batch reaction products is unstable. Utilize tank reactor and microreactor to carry out Grignard reaction respectively, reaction condition and effect are as shown in table 4.

[0071] Table 4 Comparison of Format Responses

[0072] Reactor form Grignard reagent dosage Reaction temperature / ℃ Reaction time Product content / % selectivity / % kettle reaction 1.2eq -10 30min 97 A small amount of impurities microreactor 1.1eq 20 25s 99 No impurities

[0073] It can be seen from Example 2 that the advantages of the microchannel reactor are: strengthening the mass transfer and heat transfer process, shortening the reaction time, and improving safety.

Embodiment 3

[0074] Embodiment 3—Butyl lithium reaction

[0075] The reaction formula is as follows:

[0076]

[0077] The disadvantages of butyllithium reaction are low-temperature exothermic reaction, large reaction heat, conventional reaction requirements below -70°C, absolute anhydrous and oxygen-free environment, poor selectivity, poor safety, and difficult to realize industrialization. Utilize flask reaction and microreactor to carry out butyllithium reaction respectively, and reaction condition and effect are as shown in table 5. Field experiment picture as Figure 11 shown.

[0078] The comparison of table 5 butyllithium reaction

[0079] Reactor form Feeding method Reaction temperature / ℃ Reaction time Product content / % selectivity / % flask reaction Step by drop -80～-70 5h 99.5％ 80～85 microreactor three-step joint investment -30 1min 99.9％ 86

[0080] Known by embodiment 3, the advantage of microchannel reactor is: shorten reacti...

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Abstract

The invention relates to a micro-channel reactor, which comprises a micro-reactor, an annular micro-channel is arranged in the micro-reactor, two opposite ends of the annular micro-channel are respectively a liquid inlet and a liquid outlet, the annular micro-channel has a straight corner structure between the liquid inlet and the liquid outlet, a liquid inlet included angle is formed between the liquid inlet direction of the liquid inlet and the annular micro-channel on two sides, and a liquid outlet included angle is formed between the liquid inlet direction of the liquid inlet and the annular micro-channel on two sides. The liquid inlet included angle is larger than 90 degrees. The mass and heat transfer process is enhanced, the process reaction conditions can be reduced, the reaction of the raw materials is more sufficient, the reaction time is shortened, byproducts in the reaction process can be reduced, the production efficiency of enterprises is improved, the enterprise cost is reduced, and the subsequent environmental protection pressure is reduced. Meanwhile, the research and development period is shortened, and the research and development efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of raw material reactor equipment, and in particular relates to a microchannel reactor. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] During the production and R&D process of a chemical plant to prepare a certain product, in the process of raw material reaction, it often encounters the problem that the raw material cannot be fully reacted due to the poor mixing effect of the raw material. In this case, high temperature and high pressure is generally required. Conditions, and more by-products. Therefore, in the process of production and research and development, by-products may produce hazardou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00
CPCB01J19/0093B01J2219/00873B01J2219/00889
Inventor 丁全有褚国忠赵传孝任义仙刘慧敏凯尔曼·亚森张鸿飞吴杭欣
Owner 山东科加工业技术研究院有限公司
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