Millimeter channel type continuous preparation system

A preparation system, channel-type technology, applied in the field of millimeter-channel continuous preparation systems, can solve the problems of easy blockage of pipelines, low product flow rate, high processing cost of microchannel reactors, etc., to promote turbulent flow and heat transfer qualitative effect

Active Publication Date: 2015-11-25
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the processing cost of the microchannel reactor is very expensive, the product flow rate is very low, and the pipeline is easy to block, which will face many problems in practical application

Method used

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  • Millimeter channel type continuous preparation system
  • Millimeter channel type continuous preparation system
  • Millimeter channel type continuous preparation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation system used in this example is as figure 2 As shown, the details are as follows:

[0029] The output end of the raw material tank 1 is connected to the input end of the peristaltic pump 2 through a pipeline, and the output end of the peristaltic pump 2 is connected to the input end of the channel reaction tube 3 through a pipeline; the channel reaction tube 3 is arranged in the oil bath device 4 , the effect of oil bath device 4 is to control channel type reaction tube 3 at the reaction temperature of setting; Channel type reaction tube 3 is spiral tube type, and internal diameter is 6mm, and length is 27m, and inner wall is provided with internal screw thread (such as image 3 As shown), the screw pitch is 1mm, which can promote uniform mass transfer; the output end of the channel type reaction tube 3 is connected with the input end of the condensing tube 5 through a pipeline, and the reactant in the condensing tube is cooled by a circulating water bat...

Embodiment 2

[0038] The difference from Example 1 is that in this example, two millimeter-channel continuous preparation systems are used in series, which can be used for the synthesis of core-shell structure nanocrystals. In this example, CuInS 2 / ZnS nanocrystal preparation is described in detail:

[0039] The first preparation system is the same as in Example 1; the difference between the second preparation system and the first preparation system is that the inner diameter of the channel reaction tube 3 is 6mm, the length is 81m, and the internal thread pitch is 5mm.

[0040] Steps 1-4 of the preparation process of this example use the first preparation system, and the specific operations are the same as steps 1-4 of Example 1.

[0041] 5. The CuInS obtained from the first preparation system 2 The nanocrystal solution is directly added in the raw material tank of the second preparation system (afterwards in the description of this embodiment, all components refer to the components of ...

Embodiment 3

[0047] The difference from Example 1 is that the inner diameter of the channel reaction tube 3 is 10 mm. The size, uniformity, and dispersibility of the resulting product are the same as in Example 1.

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Abstract

The invention provides a millimeter channel type continuous preparation system which can be used in preparation of various inorganic nonmetal nanocrystallines (such as oxides and sulfides). Compared with the prior art, the system has the advantages that 1, a millimeter channel type reaction pipe is adopted, and is internally provided with inner threads, so that turbulent flows are promoted to be generated in the channel, and heat and mass transfer is promoted effectively in the channel; 2, an ultrafiltration purification device is adopted for filtering out raw material molecules or ions which are subjected to non-complete reaction in a reaction mixed liquid, so that the continuous preparation of products is realized; 3, if a material tank is improved further, nitrogen can be introduced, so that the materials can be isolated from oxygen at the normal temperature, and channel type heat reaction is realized under an inert atmosphere. The millimeter channel type continuous preparation system can be used for the pilot plant test preparation of the nanocrystallines and high-molecular polymers, and can be used for effectively controlling the sizes or the molecular weight distribution of the materials.

Description

technical field [0001] The invention relates to the technical field of a pilot-scale reaction preparation system for continuous preparation of nanocrystals or polymers, in particular to a millimeter channel continuous preparation system. Background technique [0002] The molecular weight or size distribution of semiconductor nanocrystals and organic polymers has an important influence on the physical and chemical properties of materials. The traditional reactor has the problem of poor heat and mass transfer in the process of large-capacity preparation, and cannot effectively control the molecular weight or size distribution of materials. In order to further improve the synthesis efficiency and quality of materials, the use of microchannel reactors has become the focus of attention. Internationally renowned companies and research institutions, such as DuPont, Massachusetts Institute of Technology, Mainz Institute of Microtechnology, BASF, Merck, Schering, Bayer, etc., are ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00
Inventor 徐雪青成晓玲高潘谢德辉靳虎
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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