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Microwave Microchip Reactor

A reaction device and microchip technology, which is applied in the field of microwave microchip reaction devices, can solve the problems of local overheating, inability to achieve, and destroy, and achieve the effects of uniform heating temperature and improved safety.

Active Publication Date: 2016-08-17
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, microwave is widely used in the fields of material heating and drying, and because of its heat dissipation effect when microwave radiation heats solids, when microwaves heat solid materials, local overheating will occur, causing solid materials to melt and coke. , so microwave is difficult to use in the field of chemical reaction
Moreover, due to local overheating, when the fluid material is heated to react, the container carrying the material will also be locally overheated, resulting in deformation and damage to the container
And the existing literature and technical reports are mostly limited to intermittent heating and reaction, so for most chemical process reactions, the demand for uniform radiation heating and continuous uninterrupted flow reaction is the most urgent, and it is also the most to be solved and studied Technology
[0003] The invention patent (CN103055778A) is a continuous axial flow microwave reactor for drying solid materials, which is only suitable for solid materials and cannot be realized for most chemical process reactions.
The same problem. The object involved in this invention is still a solid material, and it cannot be fed and discharged continuously.

Method used

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  • Microwave Microchip Reactor
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The microwave microchip reaction device of the present embodiment comprises a microwave generating module, a microchannel reactor 6, and a feeding system 11, and the feeding system 11 is communicated with the microchannel reactor 6 through a pipeline, and the microwave generating module is supplied to the microchannel reactor 6. The fluid in the channel reactor 6 provides microwave heating. The microwave generation module includes a magnetron 9, a microwave energy exporter 10, a waveguide 4, and a waveguide array 5. The waveguide array 5 is a two-dimensional plane accumulation of several waveguides on a plane perpendicular to the microwave emission direction of the waveguide array. The direction of each waveguide is the same as the emission direction of the waveguide array 5 , and the magnetron 9 generates microwaves and transmits them to the microwave energy exporter 10 through the waveguide 4 to the waveguide array 5 for emission. The microchannel reactor 6 of this em...

Embodiment 2

[0035] Other settings are the same as in Example 1, but the microchannel width of the microchannel reactor 6 is 3 millimeters.

Embodiment 3

[0037] Using the device described in Example 1, feed 1mmol of salicylaldehyde, 2mmol of malononitrile, 1mmol of p-methylthiophenol, and 0.2mmol of pyridine dissolved in 4mL of ethanol. The reaction continued for 15 minutes at a feed rate of 1 / min. After post-treatment, cooling, filtration, and washing with ethanol gave 0.306 g of a white solid, with a yield of 85%.

[0038] After conventional reaction for 3 hours, 0.266g of white solid was obtained, yield 74%;

[0039] The microwave reaction time was shortened to 8.3% of the original, and the yield increased by 11%.

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Abstract

The invention discloses a microwave microchip reaction device which is characterized by comprising a microwave generation module, a micro-channel reactor and a feeding system, wherein the microwave generation module generates microwave to heat a fluid in the micro-channel reactor; and the feeding system is communicated to a micro-channel inlet of the micro-channel reactor through a pipeline. According to the microwave microchip reaction device, the heating power of any horizontal plane perpendicular to the microwave transmission direction in a microwave cavity is consistent, so that the heating temperature in the plane is uniform, and materials can enter a reaction cavity continuously; the total size of the microchip is small, the channel characteristic scale cannot reach a critical scale of flame transmission, and a small quantity of reaction holdings exist in the microchip, so that the microchip reaction device has internal safety; and in a microwave field, the device can be applied to a flammable and combustible reaction process with strong heat release, accordingly, the safety of the reaction process can be remarkably improved, and continuous production is realized.

Description

technical field [0001] The invention relates to a microwave microchip reaction device, which belongs to the field of microchemical machinery. Background technique [0002] At present, microwave is widely used in the fields of material heating and drying, and because of its heat dissipation effect when microwave radiation heats solids, when microwaves heat solid materials, local overheating will occur, causing solid materials to melt and coke. , so microwave is difficult to use in the field of chemical reaction. Moreover, due to local overheating, when the fluid material is heated to react, the container carrying the material will also be locally overheated, resulting in deformation and damage to the container. And the existing literature and technical reports are mostly limited to intermittent heating and reaction, so for most chemical process reactions, the demand for uniform radiation heating and continuous uninterrupted flow reaction is the most urgent, and it is also th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/12B01L3/00
Inventor 郭凯张锴李辉欧阳平凯涂善东
Owner NANJING TECH UNIV
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