Method for extracting and separating scandium-iron solution by using microchannel reactor

A micro-channel reactor, micro-reactor technology, applied in the direction of instrument, process efficiency improvement, special data processing application, etc., can solve the problems of difficult separation and few process parameters, etc.

Pending Publication Date: 2021-09-14
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Utilizing the advantages of high safety, mass transfer and heat transfer performance of the microreactor, it can be applied in the field of rare earth separation. At present, the application of microreactor in the field of rare earth separation is relatively mature, but for the separation of scandium iron stage, due to the similar performance of the two, it is extremely difficult to separate, and the current source of scandium is divided into three sources: mineral source, industrial waste residue and industrial waste liquid, so it contains a large amount of impurity iron, and the use of microchannels for scandium iron There are few reports on the separation of ferric scandium at present, and for a specific microreactor, its specific process parameters and specific reaction analysis data are less, so there is an urgent need for an accurate analysis of the microchannel reactor extraction method for the separation of scandium iron solution

Method used

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  • Method for extracting and separating scandium-iron solution by using microchannel reactor
  • Method for extracting and separating scandium-iron solution by using microchannel reactor
  • Method for extracting and separating scandium-iron solution by using microchannel reactor

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Experimental program
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Effect test

Embodiment 1

[0076] A method for extracting and separating scandium iron solution in a microchannel reactor, comprising the following steps:

[0077] S1 put the extractant and the diluent in the microchannel reactor, and at the same time put the standard scandium iron solution in the microchannel reactor for reaction, the reaction starts, count the various process parameters in the reaction stage, and analyze the effect of the process parameters on the scandium extraction rate. Effect, Effect of Iron Extraction Rate and Separation Coefficient; Standard Solution Configurations:

[0078] Calculate and weigh the required contents of scandium sulfate and ferric sulfate, add deionized water to dissolve in a beaker, stir until completely dissolved, transfer the solution to a volumetric flask for constant volume, and adjust the pH to 2.00 with concentrated sulfuric acid to obtain Standard solution with scandium ion concentration of 99.99mg / L and iron ion concentration of 428.36mg / L;

[0079] In ...

Embodiment 2

[0185] The microchannel reactor is selected as figure 2 For the shown co-current rotating wiped-film microchannel reactor, the specific structure can refer to "A Lengthened Wiped-Film Type Rotating Microchannel Enhanced Extraction Equipment" with Application No. 201822159540 and "A Wiped-Film Type Rotating Microchannel with Application No. 20182215347". The difference is that the liquid outlet is arranged side by side at the bottom end, and the rest of the structure is the same; the process parameters include rotational speed, flow rate, ratio (O / A), tube length, inner tube diameter; the remaining steps and formula are the same as in Example 1.

[0186] data analysis:

[0187] Depend on Figure 5 In Figure (1), it can be seen that the extraction rate of scandium shows a trend of first increasing and then stable with the increase of the rotation speed of the inner cylinder rotor, and reaching a stable state when the rotation speed is 200 rpm, indicating that the extraction o...

Embodiment 3

[0203] The optimal process parameters obtained by the above-mentioned "T" shaped inlet spiral microchannel reactor and co-current rotating wiped film microchannel reactor were carried out back extraction experiments. When the "T" shaped inlet spiral microchannel reactor was used :

[0204] Depend on Image 6 Figure (1) in the figure shows that deionized water can strip 41.52% of iron in the organic phase. The addition of sulfuric acid can significantly improve the stripping rate of iron. When the concentration of sulfuric acid reaches 0.1 mol / L, the extraction amount of iron tends to increase. It is stable at 72.49%, indicating that 0.1mol / L sulfuric acid solution is the HSO provided by the system 4 - The saturated amount of back-extraction has been reached. Continue to increase the concentration of sulfuric acid solution, and the improvement of the iron back-extraction rate becomes smaller. Therefore, 0.1 mol / L sulfuric acid solution is selected as the back-extraction agent...

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Abstract

The invention discloses a method for extracting and separating scandium and iron solution by a microchannel reactor, and the method comprises the following steps: S1, counting each process parameter of the microchannel reactor, and analyzing the influence of the process parameters on scandium extraction rate, iron extraction rate and separation coefficient; S2, observing by using a CCD high-speed camera to obtain flow pattern data; S3, integrating the process parameters and the flow pattern data, simulating the flow pattern data by CFD software, and determining the process parameters and the flow pattern data of the optimal processing process; S4, processing the actual scandium iron solution by utilizing the determined process parameters and flow pattern data, and counting the extraction efficiency. The invention has the beneficial effects that the standard reaction liquid is treated by adopting each process parameter in the micro-channel reactor, the process parameters influencing extraction are analyzed, the relationship between the flow pattern and the mass transfer is observed through the CCD high-speed camera, and the relationship is simulated and determined by CFD software, so the aim of accurate analysis is fulfilled.

Description

technical field [0001] The invention relates to the technical field of extraction and preparation of rare earth elements, in particular to a method for extracting and separating scandium iron solution in a microchannel reactor. Background technique [0002] Microreactor, as the name implies, refers to a reactor that controls chemical reactions at the microscopic scale based on microfluidic technology, and conducts observation, operation and control of the reactions. Initially, the tubular microreactor with a diameter of about 10mm and used for kinetic research was defined as a microchannel reactor; later, with the development of microelectronics, micromachines, microchemicals and other technologies, the diameter of the fluid inside the reactor will be controlled within Within the range of 1um-1mm, the reactors that can be used for chemical reactions are collectively referred to as microreactors. In chemical production, in order to meet the thermodynamic and kinetic requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F30/23G16C20/10C22B3/02C22B3/38C22B59/00G06F113/08G06F119/14
CPCG06F30/28G06F30/23G16C20/10C22B59/00C22B3/02G06F2113/08G06F2119/14Y02P10/20
Inventor 罗建洪刘辉王琳溪郭子妮
Owner SICHUAN UNIV
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