Micro-mixing system and method for photochemical reaction in tubular reactor

A photochemical reaction, tubular reactor technology, applied in chemical instruments and methods, chemical/physical/physical-chemical reactors, chemical/physical/physical-chemical processes using energy, etc. There is no targeted solution to the problems of illumination and low degree of internal disturbance, so as to achieve the effect of basically consistent residence time, reduced boundary layer thickness, and consistent residence time

Pending Publication Date: 2018-12-14
SHANDONG TSINGCHUANG CHEMICALSCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively strengthen the synthesis process and improve the controllability of the process for general organic synthesis, but for photochemical reactions, it does not specifically solve the problem of uneven illumination. Strength still needs to be further improved
From the perspective of the structure of the tubular reactor, the core problem is that the reaction liquid is always at the position facing away from the light source, and only the energy of the photons after passing through the liquid layer can be obtained. The existing tubular reactor does not change its winding method for the light source.
In addition, the radius of curvature of the tube winding is usually much larger than the inner diameter of the tube, resulting in an overly stable flow of the liquid column and a low degree of internal disturbance

Method used

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  • Micro-mixing system and method for photochemical reaction in tubular reactor
  • Micro-mixing system and method for photochemical reaction in tubular reactor
  • Micro-mixing system and method for photochemical reaction in tubular reactor

Examples

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Effect test

Embodiment 1

[0050] The micro-mixing system for photochemical reaction in a tubular reactor with an inverted structure in Example 1 of the present invention is composed of a micro-mixing unit and a tubular photochemical reaction device (including a tubular reactor and a light source).

[0051] The micro-mixing unit is a T-shaped structure, the inner diameter of the main channel is 1mm, and the inner diameter of the side channel is 0.05mm; the light source is a light strip formed by a 50-watt LED lamp bead array, and the wavelength is 475nm; the tubular reactor has an inner diameter of 1mm and an outer diameter of 2mm. Perfluoroethylene propylene copolymer tubes, tubular reactors according to image 3 The light source light belt is on the outside of the tubular reactor, the two are coaxial, and it is also a spiral winding method, and the distance between the control tube wall and the LED light belt is 1cm (the tube reactor that does not surround the axis) There is no LED light strip winding...

Embodiment 2

[0057] The micro-mixing system of the photochemical reaction in the tubular reactor with inverted structure of the embodiment 2 of the present invention is composed of a micro-mixing unit and a tubular photochemical reaction device, that is, a micro-mixing unit and a tubular photochemical reaction device (comprising a tube type reactor and light source).

[0058] The micro-mixing unit is a cross-flow shear structure, the inner diameter of the main channel is 0.5mm, and the inner diameter of the two side channels is 1mm; the light source is a light strip formed by a 50-watt LED lamp bead array, and the wavelength is 475nm; the inner diameter of the tubular reactor is 1mm , perfluoroethylene propylene copolymer tube with an outer diameter of 2mm, and the tubular reactor is in accordance with Figure 4 Winding in the way of A; the light source light belt is on the outside of the tubular reactor, the two are coaxial, and it is also a spiral winding method, and the distance between...

Embodiment 3

[0064] The micro-mixing system of the photochemical reaction in the tubular reactor with reverse structure of the embodiment of the present invention 3, it is by micro-mixing unit and 2 casing type photochemical reaction devices (comprising 2 tubular reactors, 2 cold traps and 2 light sources).

[0065] The micro-mixing unit is an improved coaxial annular tube structure, the inner diameter of the droplet forming chamber is 2.5mm, the inner diameter of the reaction solution channel is 1mm, the inner diameter d of the output channel is 1.5mm, and the inner tube is the inner wall of the superhydrophobic coating (with the dispersion The contact angle of the phase liquid is 151°); the first and second light sources are both 100-watt high-pressure mercury lamps; the first and second cold traps are made of high borosilicate glass, which filter out ultraviolet light below 300nm, and the mercury lamp is placed in a cold trap In the trap; the tubular reactor is a perfluoroethylene propy...

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Abstract

The invention relates to micro-mixing system and method for a photochemical reaction in a tubular reactor. The system is composed of a micro-mixing unit and a tubular photochemical reaction apparatusthat are connected in series. In the micro-mixing unit, a gas-phase or liquid-phase carrier, that is insoluble with a reaction liquid, can shear the reaction liquid into liquid columns. The system iscontinuous and stable and has high photo-energy utilization rate. By means of the system, the reaction liquid can be fully irradiated under a light source, wherein internal disturbance in the reactionliquid is effectively reinforced, and the photochemical synthesis process is enhanced. The system is low in production cost, is simple in operation and is controllable in process, and has great prospect in industrial application of photochemical reaction.

Description

technical field [0001] The invention belongs to the field of organic photochemical synthesis, in particular to a micro-mixing system and method for photochemical reaction in a tubular reactor. Background technique [0002] Photochemical reactions have the characteristics of process green, Advantages such as low pollution have been widely concerned and researched by people in the past few decades. However, limited by equipment conditions and photon attenuation, photochemical production has serious problems such as low utilization rate of light energy and difficulty in scaling up equipment [Su, Y.; Straathof, N.J.W.; Hessel, V.; Noe ·· l, T., Chem.-Eur. J. 2014, 20, 10562]. Specifically, due to the sharp attenuation of photons in the liquid with the thickness of the liquid layer (Lambert-Beer law), it poses difficulties for device scaling. Simply adopting the method of volume amplification, on the one hand, due to the increase in the thickness of the liquid layer, the photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J19/12
CPCB01J19/0093B01J19/12B01J2219/0093B01J2219/00889B01J2219/00894
Inventor 陈桂光杜乐申春
Owner SHANDONG TSINGCHUANG CHEMICALSCO LTD
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