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Method for preventing interfacial crud during vanadium-chromium extraction and separation

A technology for separation process and interface contamination, applied in the direction of process efficiency improvement, etc., can solve the problems of inability to fundamentally eliminate interface contamination, little research on vanadium-chromium separation, and few industrialized examples, etc., to prevent interface contamination, The effect of saving labor and equipment cost

Inactive Publication Date: 2010-03-10
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The U.S. patent once reported the elimination method of the interface dirt in the copper solvent extraction process, and the patent provides a special device to remove the interface dirt in the extraction process. This method is actually suitable for the elimination of various system interface dirt, but This method requires additional equipment and an additional operation, which will increase the operating cost, and it cannot fundamentally eliminate the interface dirt, but only solves the surface problem and temporarily ensures the normal operation of the process
In addition, there are no patent reports at home and abroad on the prevention or elimination of contamination at the interface of the vanadium-chromium extraction and separation system, which may be because there are not many studies on the separation of vanadium-chromium by researchers at present, and there are fewer industrialized examples.

Method used

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  • Method for preventing interfacial crud during vanadium-chromium extraction and separation
  • Method for preventing interfacial crud during vanadium-chromium extraction and separation

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The chromium-containing vanadium slag leaching liquid was used as the extraction liquid, and the primary amine extractant N1923 and the diluent cyclohexane were used to make the organic phase, and the extraction separation test was carried out, and the pH values ​​​​of the feed liquid were adjusted to 3.20, 4.20, 5.20, 6.20, 7.20, 8.20, the volume concentration of the extractant is selected to be 15% (v / v), the extraction temperature is room temperature (25°C), the aqueous phase and the organic phase are mixed in a separatory funnel, and then the separatory funnel is fixed on the Conrad shaker Vibrate for 5 minutes, remove the shaker and let the layers stand for 30 minutes, then take out the interface dirt between the aqueous phase and the organic phase, measure the volume of the interface dirt with a graduated cylinder of appropriate specifications, and then use the volume of the measured interface dirt to divide The sum of the volumes of the initial aqueous phase and t...

Embodiment 2

[0025] Using the chromium-containing vanadium slag leaching liquid as the extraction liquid, the primary amine extractant N1923 and the diluent cyclohexane were used to form the organic phase, and the extraction separation test was carried out, wherein the pH value of the feed liquid was adjusted to 5.20, and the volume concentration of the extractant was selected as (v / v) 5%, 10%, 15%, 20%, 30%, 40%, the extraction temperature is room temperature (25°C), the aqueous phase and the organic phase are mixed in a separatory funnel, and then the separatory funnel is fixed on Shake for 5 minutes on the Consonian oscillator, remove the oscillator and let the layers stand for 30 minutes, then take out the dirt at the interface between the aqueous phase and the organic phase, measure the volume of the dirt at the interface with a graduated cylinder of appropriate specifications, and then use the measured interface Divide the volume of the dirt by the sum of the volumes of the initial a...

Embodiment 3

[0027] The leaching solution of chromium-containing vanadium slag was used as the extraction liquid, and the organic phase was prepared with the primary amine extractant N1923 and the diluent, and the extraction and separation test was carried out. The value is 5.20, the extractant volume concentration is selected as 15% (v / v), and the extraction temperature is room temperature (25° C.), the aqueous phase and the organic phase are mixed in a separating funnel, and then the separating funnel is fixed on a Kang’s vibration Shake on the shaker for 5 minutes, take off the shaker and let the layers stand for 30 minutes, then take out the interface dirt between the aqueous phase and the organic phase, use a graduated cylinder of appropriate specifications to measure the volume of the interface dirt, and then use the volume of the measured interface dirt Divide the volume by the sum of the volume of the initial aqueous phase and the organic phase, and record it as the generation rate ...

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Abstract

The invention discloses a method for preventing interfacial crud during vanadium-chromium extraction and separation, which is characterized in that during extraction, vanadium and chromium are extracted and separated by use of amine-type extractant in an organic phase containing the amine-type extractant and diluent composition; an aqueous phase adopts a leaching solution which contains vanadium-chromium slag and has acidity adjusted through dilute sulfuric acid or sodium hydroxide solution; and the method comprises the steps of mixing the aqueous phase with the organic phase in a separating funnel at a certain temperature, fixing the separating funnel on an oscillator, oscillating for a certain time, taking out and standing the separating funnel for demixing. The method has the advantagesof effectively preventing interfacial crud produced during vanadium-chromium extraction and separation, improving extraction equilibrium phase-separation speed, reducing the loss of organic phase andsaving operation cost.

Description

technical field [0001] The invention belongs to the field of preventing interface dirt in heavy metal extraction, and in particular relates to a method for preventing interface dirt occurring in the extraction and separation process of vanadium and chromium. Background technique [0002] With the continuous deepening of environmental protection awareness, the recycling of toxic and harmful substances has become a research hotspot in current scientific research. Heavy metal resources, especially the mining of low-grade ores and the recovery and recycling of a large number of heavy metals have attracted more and more attention. Chromium-containing vanadium slag contains a large amount of rare metals vanadium and chromium. If it is not properly treated, it will pose a great threat to the ecological environment and people's health. Therefore, the vanadium and chromium in it are separated and recovered for recycling. deep meaning. [0003] The separation of vanadium and chromiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/28
CPCY02P10/20
Inventor 曹宏斌宁朋歌张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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