CN102021605B - Purification and regeneration method of indium electrolysis waste liquid - Google Patents
Purification and regeneration method of indium electrolysis waste liquid Download PDFInfo
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- CN102021605B CN102021605B CN201010605760A CN201010605760A CN102021605B CN 102021605 B CN102021605 B CN 102021605B CN 201010605760 A CN201010605760 A CN 201010605760A CN 201010605760 A CN201010605760 A CN 201010605760A CN 102021605 B CN102021605 B CN 102021605B
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- electrolysis waste
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- indium electrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a purification and regeneration method of an indium electrolysis waste liquid. The invention aims to provide a purification and regeneration method of an indium electrolysis waste liquid. The method is characterized by comprising the following steps: (A) evenly mixing N235 and TBP according to the volume ratio of 100:1 to prepare a mixture; (B) evenly mixing the mixture prepared in the step (A) and aviation kerosene according to the volume ratio of 1:3 to prepare a mixed extraction agent; (C) putting the mixed extraction agent prepared in the step (B) into an agitating tank, cleaning by distilled water, and adjusting the pH value to be 2-3; (D) injecting the indium electrolysis waste liquid into the agitating tank in the step (C) for agitating and extracting; and (E) putting the electrolyte agitated in the step (D) into a standing pool for standing for 30-90 minutes, layering for discharging the electrolyte at the bottom layer to obtain the purified and regenerated electrolyte, and carrying out back extraction and regeneration on the extraction agent at the upper layer for recycling. The invention is mainly used for purification and regeneration of the indium electrolysis waste liquid.
Description
Technical field
The present invention relates to a kind of purifying regeneration method of electrolysis waste solution, relate in particular to a kind of purifying regeneration method of indium electrolysis waste solution.
Background technology
Indium is strong because of its light perviousness and electroconductibility, is mainly used in to produce ITO target (being used to produce liquid-crystal display and flat screens), and this purposes is the main consumer field of indium, accounts for 70% of global indium consumption.The several consumer fields of next are respectively: the electronic semi-conductor field accounts for 12% of global consumption; Scolder and alloy field account for 12%; The research industry accounts for 6%.In the application of indium, its purity all requires more than 99.995%, and impurity elements such as cadmium and thallium all require below 0.0005%.
The process that is purified to 99.99% indium from 98% thick indium mainly is electrolysis, and the foreign matter content of electrolytic solution is the key whether electrolytic process can the output qualified product.Because contained impurity element such as Cd, Tl, the Sn etc. of anode accumulate in electrolytic solution easily in the thick indium electrolytic process, cause electrolysis cathode precipitate foreign matter content high and cause product defective.To be that electrolytic solution that foreign matter content is high is discarded reclaim existing method, prepares new electrolytic solution again, and it is long and expense is high to prepare new electrolytic solution required time.
Summary of the invention
The object of the present invention is to provide a kind of purifying regeneration method of indium electrolysis waste solution, prepare the drawback that new electrolytic solution produces again to overcome.
For achieving the above object, technical solution of the present invention is: a kind of purifying regeneration method of indium electrolysis waste solution is characterized in that following steps:
A, with N235 and TBP volume ratio mixing by 100: 1, make mixture;
B, the mixture that steps A is made and aviation kerosene make mixed extractant by 1: 3 volume ratio mixing;
C, the mixed extractant that step B is made are put into steel basin, and cleaning and adjust the pH value with distilled water is 2-3;
In D, the steel basin, stir extraction with indium electrolysis waste solution implantation step C;
E, the electrolytic solution after step D stirred are put into and are left standstill the pond, leave standstill 30-90 minute, and bottom electrolytic solution is emitted in layering, are the regenerating electrolytes after the purification, and extraction agent recirculation after back extraction in upper strata is used.
The invention has the beneficial effects as follows: the extraction agent selectivity is good, and regeneration of electrolyte speed is fast, and energy consumption is low, and apparatus processing is simple, and the foreign matter content of extraction back electrolytic solution is low, in the electrolytic solution loss of indium little, extraction agent can be recycled, and can adapt to the production needs.
Embodiment
Below in conjunction with embodiment the present invention and embodiment thereof are described in further detail.
The invention is characterized in following steps:
A, with N235 and TBP volume ratio mixing by 100: 1, make mixture;
B, the mixture that steps A is made and aviation kerosene make mixed extractant by 1: 3 volume ratio mixing;
C, the mixed extractant that step B is made are put into steel basin, and cleaning and adjust the pH value with distilled water is 2-3;
In D, the steel basin, stir extraction with indium electrolysis waste solution implantation step C;
E, the electrolytic solution after step D stirred are put into and are left standstill the pond, leave standstill 30-90 minute, and bottom electrolytic solution is emitted in layering, are the regenerating electrolytes after the purification, and extraction agent recirculation after back extraction in upper strata is used.
A, with N235 and TBP volume ratio mixing by 100: 1, make mixture;
B, the mixture that steps A is made and aviation kerosene are by 1: 3 volume ratio mixing, shooting mixed extractant;
C, step B is made mixed extractant put into agitated pool, cleaning and adjust the pH value with distilled water is 2-3;
In D, the steel basin, stir extraction with indium electrolysis waste solution implantation step C;
E, the electrolytic solution after step D stirred are put into and are left standstill the pond, leave standstill 30-90 minute, and bottom electrolytic solution is emitted in layering, are the regenerating electrolytes after the purification, and extraction agent recirculation after back extraction in upper strata is used.
Below provide embodiments of the invention:
Example 1
With N235 (trioctylamine claims three octyl tertiary amines again) and the volume ratio mixing of TBP (tributylphosphine), make mixture by 100: 1; This mixture and aviation kerosene are pressed 1: 3 volume ratio mixing, make mixed extractant; This mixed extractant is put into steel basin, clean 2 times, and adjustment pH value is 2 with distilled water; The indium electrolysis waste solution is pumped in the agitated pool, starting agitator (2 rev/mins) stirs extraction and puts into after 45 minutes and leave standstill the pond, left standstill 30 minutes, layering appears, impurity Cd, Tl, Sn etc. are extracted to the upper strata, electrolytic solution behind the extracting and purifying is emitted from bottom, is the electrolytic solution of purifying regeneration, and recirculation was used after impure upper strata extraction agent was sent to back extraction.
Example 2
The pH value of mixed extractant is 3, and agitator speed is 3 rev/mins, and the extraction time is 70 minutes, and time of repose is 60 minutes, and all the other are with example 1.
Example 3
Agitator speed is 5 rev/mins, and the extraction time is 90 minutes, and time of repose is 90 minutes, and all the other are with example 1.
The extraction results of this example is listed as follows:
Before the last table electrolytic solution after for extraction and the extraction and new electrolyte comparison sheet.
Claims (1)
1. the purifying regeneration method of an indium electrolysis waste solution is characterized in that following steps:
A, with N235 and TBP volume ratio mixing by 100: 1, make mixture;
B, the mixture that steps A is made and aviation kerosene make mixed extractant by 1: 3 volume ratio mixing;
C, the mixed extractant that step B is made are put into steel basin, and cleaning and adjust the pH value with distilled water is 2-3;
In D, the steel basin, stir extraction with indium electrolysis waste solution implantation step C;
E, the electrolytic solution after step D stirred are put into and are left standstill the pond, leave standstill 30-90 minute, and bottom electrolytic solution is emitted in layering, are the regenerating electrolytes after the purification, and extraction agent recirculation after back extraction in upper strata is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010605760A CN102021605B (en) | 2010-12-27 | 2010-12-27 | Purification and regeneration method of indium electrolysis waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010605760A CN102021605B (en) | 2010-12-27 | 2010-12-27 | Purification and regeneration method of indium electrolysis waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102021605A CN102021605A (en) | 2011-04-20 |
| CN102021605B true CN102021605B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010605760A Expired - Fee Related CN102021605B (en) | 2010-12-27 | 2010-12-27 | Purification and regeneration method of indium electrolysis waste liquid |
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| CN110923751A (en) * | 2019-11-28 | 2020-03-27 | 广东先导稀材股份有限公司 | Method for recovering indium from solution after indium electrolysis |
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| CN1243890A (en) * | 1998-08-04 | 2000-02-09 | 曹国荣 | Process for extracting golf from waste gold-plating liquid |
| CN1253589C (en) * | 2003-03-20 | 2006-04-26 | 中南大学 | Method for wet zinc refining without iron slag |
| CN101660054B (en) * | 2009-07-15 | 2011-08-10 | 中国科学院青海盐湖研究所 | Method for extracting metal indium from waste residues generated from lead and zinc smelting |
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