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Micro reaction device and method for synthesizing ferroferric oxide nano-powder

A micro-reaction device, ferric oxide technology, applied in chemical instruments and methods, iron oxide/iron hydroxide, chemical/physical/physicochemical reactors, etc., to achieve narrow particle size distribution, avoid wall deposition and micropipes The effect of clogging

Inactive Publication Date: 2018-12-14
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The test results show that compared with the current existing device methods, this device greatly avoids the problems of wall deposition and micropipe clogging caused by the growth of nanomaterials, and provides a new type of high-throughput continuous synthesis of nanometer trioxide for the market. The micro-reaction device for iron nano-powder has obtained high-purity, narrow particle size distribution, and uniformly dispersed ferric iron tetroxide nano-powder, and developed the experimental technology for controllable synthesis of nano-powder

Method used

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  • Micro reaction device and method for synthesizing ferroferric oxide nano-powder
  • Micro reaction device and method for synthesizing ferroferric oxide nano-powder
  • Micro reaction device and method for synthesizing ferroferric oxide nano-powder

Examples

Experimental program
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Effect test

Embodiment 1

[0096] Embodiment 1 (taking microchannel reactor-1 as example, as Figure 9-10 shown)

[0097] (1) Dissolve 4.97 g span80 in 34.80 g hexadecane to prepare the carrier continuous phase. Dissolve 1.19 g of ferrous chloride and 3.24 g of ferric chloride in 50 ml of water to prepare a mixed solution of 0.12 mol / L ferrous chloride and 0.24 mol / L ferric chloride. Dissolve 3.84 g of sodium hydroxide in 50 ml of water to prepare a solution of 1.92 mol / L.

[0098] (2) Inject the hexadecane carrier continuous phase containing span80 into the micro-reaction main channel (3-7) of the carrier continuous phase of the microreactor at a flow rate of 40 µL / min through the micro-syringe pump-2, which can precisely control the flow rate; The alkaline solution is injected into the alkaline solution branch channel (3-5) at a flow rate of 20 µL / min through the micro-injection pump-1, which can precisely control the flow rate, to form a uniform size and stable dispersion in the stable dispersion c...

Embodiment 2

[0104] Embodiment 2 (taking microchannel reactor-3 as example, as Figure 9-10 shown, and Figure 9 Microchannel Reactor-1 in is replaced by Microchannel Reactor-3)

[0105] In this example, the hexadecane carrier continuous phase, alkaline solution, Fe 2+ / Fe 3+ The preparation of the mixed solution is consistent with that of Example 1.

[0106] (1) Inject the hexadecane carrier continuous phase containing span80 into the micro-reaction main channel (5-7) of the carrier continuous phase of the microreactor at a flow rate of 40 µL / min through the micro-syringe pump-2, which can precisely control the flow rate; The alkaline solution is injected into the branch channel (5-5) of the alkaline solution at a flow rate of 20 µL / min through the micro-injection pump-1, which can precisely control the flow rate, to form a uniform size and stable dispersion in the stable dispersion channel cavity (5-1-1). droplet, after stabilization, the Fe 2+ / Fe 3+ The mixed solution is injected...

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Abstract

The invention discloses a micro-reaction device and a method for synthesizing ferroferric oxide nano-powder. The micro-reaction device comprises an upper cover plate and a lower bottom plate, as wellas a first micro heat exchanging plate, a microchannel reactor, and a second micro heat exchanging plate which are sequentially sealed between the above two plates, wherein the upper cover plate, thefirst micro heat exchanging plate, the microchannel reactor, the second micro heat exchanging plate and the lower bottom plate are sealed and connected in a melt welding manner; two reaction dispersion phase solutions are injected into the micro-reaction device by a microinjection pump and are subjected to interfacial precipitation reaction in a continuous phase of a carrier to obtain ideal ferroferric oxide nano-powder with high purity, controllable particle size and narrow size distribution. The method adopts a three-strand parallel feeding manner of dispersion phases and continuous phase, and independently controls each strand of feeding, so that the operation flexibility is increased, and the overall operation process is more controllable; meanwhile, various reaction stages are separately matched with one heat exchanging mode, so that the temperature required in each reaction stage is more precise and uniform.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic nanomaterials and the field of microchemical industry, and particularly relates to a micro-reaction device and method for synthesizing inorganic nano-powders. A microchannel reactor is used to carry out direct precipitation reaction between liquid-liquid phase interfaces, and micro The reaction device achieves the purpose of flexibly controlling particle shape, size and size distribution, and finally obtains ferric oxide nanopowder with high purity, controllable particle size and ideal size distribution. Background technique [0002] With the development of contemporary electrification and information society, Fe3O4 nanopowder, as a multifunctional magnetic nanomaterial, has been widely used in chemical catalysis, biomedicine, and magnetic fluid. Since its different application fields depend on its physical properties such as particle size, shape, and size distribution, it is necessary to fle...

Claims

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Application Information

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IPC IPC(8): B01J19/00B82Y40/00C01G49/08
CPCB01J19/0013B01J19/0053B01J19/0093B82Y40/00C01G49/08
Inventor 赵玉潮马海云金楠张鹏张保卫冯咏梅任万忠
Owner YANTAI UNIV
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