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Microchannel reactor of polytetrafluoroethylene hollow fiber membrane as well as preparation and application of microchannel reactor

A microchannel reactor, polytetrafluoroethylene technology, applied in chemical/physical/physical chemical reactors, chemical instruments and methods, membranes, etc. The effect of stable properties, simple preparation process and low cost

Active Publication Date: 2022-03-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of the existing microchannel reactor such as high production cost, poor acid corrosion resistance, and difficulty in multi-channel amplification, the present invention provides a polytetrafluoroethylene hollow fiber membrane microchannel reactor, which combines the polytetrafluoroethylene hollow fiber membrane with the microchannel The reactors are coupled, and the related structure of the polytetrafluoroethylene hollow fiber membrane realizes the low cost and multi-channel amplification of the microchannel reactor, and solves practical problems such as the conventional metal microchannel reactor is not resistant to acidic medium corrosion

Method used

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  • Microchannel reactor of polytetrafluoroethylene hollow fiber membrane as well as preparation and application of microchannel reactor
  • Microchannel reactor of polytetrafluoroethylene hollow fiber membrane as well as preparation and application of microchannel reactor

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Embodiment 1

[0044] The invention provides a polytetrafluoroethylene hollow fiber membrane microchannel reactor, a preparation method and its application in the preparation of nanoparticles.

[0045] a. First prepare polytetrafluoroethylene hollow fiber microporous membrane:

[0046] 1) Uniformly mixing polytetrafluoroethylene dispersion resin and mineral spirits, the mass fractions are respectively 77% and 23%;

[0047] 2) Mature the above uniformly mixed material at 35°C for 15 hours;

[0048] 3) Put the above-mentioned mixture after aging into the pre-pressing equipment, and pre-press for 3 minutes under 2.5 MPa to obtain the green body;

[0049] 4) Load the prepared polytetrafluoroethylene body into extrusion equipment, and push at 90°C to obtain nascent PTFE hollow fiber membranes;

[0050] 5) Degrease the nascent polytetrafluoroethylene hollow fiber membrane at 250°C for 8 minutes to remove solvent oil;

[0051] 6) Stretch the degreased polytetrafluoroethylene hollow fiber membran...

Embodiment 2

[0062] The invention provides a polytetrafluoroethylene hollow fiber membrane microchannel reactor, a preparation method and its application in flue gas decarbonization.

[0063] a. First prepare polytetrafluoroethylene hollow fiber microporous membrane:

[0064] 1) Uniformly mixing polytetrafluoroethylene dispersion resin and mineral spirits, the mass fractions are respectively 76% and 24%;

[0065] 2) Aging the uniformly mixed material at 40°C for 10 hours;

[0066] 3) Put the above-mentioned mixture after aging into the pre-pressing equipment, and pre-press for 5 minutes under 2.0 MPa to obtain the green body;

[0067] 4) Load the prepared polytetrafluoroethylene blank into extrusion equipment, and push at 70°C to obtain nascent PTFE hollow fiber membranes;

[0068] 5) Degrease the nascent polytetrafluoroethylene hollow fiber membrane by heat treatment at 200°C for 10 minutes to remove solvent oil;

[0069] 6) Stretch the degreased polytetrafluoroethylene hollow fiber me...

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Abstract

The invention relates to a polytetrafluoroethylene hollow fiber membrane microchannel reactor and a preparation method thereof. The polytetrafluoroethylene hollow fiber membrane microchannel reactor comprises a reactor shell, a polytetrafluoroethylene hollow fiber membrane, a tube pass inlet, a tube pass outlet and a shell pass inlet (which can include or does not include the shell pass outlet); the polytetrafluoroethylene hollow fiber membrane comprises a microporous part and a compact part, and the two parts are filled and separated by a sealing material in a reactor. The device is simple in preparation process, the size of the micro-channel is easy to control, the cost of the hollow fiber membrane is low, and linear amplification of a multi-channel parallel mode can be realized; the polytetrafluoroethylene material has stable physical and chemical properties, corrosion resistance and high and low temperature resistance, and is more suitable for severe environments such as strongly acidic environments compared with the traditional microchannel reactor material; the pore diameter of the polytetrafluoroethylene hollow fiber microporous membrane is in the micro-nano scale, the interphase mixing effect is better, the reaction strengthening effect is remarkable, and the polytetrafluoroethylene hollow fiber microporous membrane has a good application prospect in industrial production.

Description

technical field [0001] The invention belongs to the field of microreactors, and in particular relates to a polytetrafluoroethylene hollow fiber membrane microchannel reactor and a preparation method thereof. Background technique [0002] Microchannel reactors are microreactors with characteristic dimensions in microns or submillimeters manufactured by precision machining technology. Due to its internal microstructure, the microreactor equipment has a very large specific surface area, which can be dozens or even hundreds of times larger than that of a stirred tank. Compared with traditional chemical equipment, microchannel reactors have the advantages of small size, high mass transfer efficiency, intrinsic safety, and strong controllability. At the same time, they have excellent heat transfer capabilities, which can realize instant mixing of materials and efficient heat transfer. , so many reactions that cannot be realized in conventional reactors can be realized in microrea...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01D67/00B01D69/08B01D69/02B01D71/36
CPCB01J19/0093B01D67/0083B01D69/08B01D69/02B01D71/36B01J2219/00907B01D2325/023B01D2325/22B01D2325/30
Inventor 康国栋于海军刘丹丹曹义鸣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI