CN102002591A - Process for extracting indium from waste liquid crystal display screen - Google Patents
Process for extracting indium from waste liquid crystal display screen Download PDFInfo
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- CN102002591A CN102002591A CN2010102955907A CN201010295590A CN102002591A CN 102002591 A CN102002591 A CN 102002591A CN 2010102955907 A CN2010102955907 A CN 2010102955907A CN 201010295590 A CN201010295590 A CN 201010295590A CN 102002591 A CN102002591 A CN 102002591A
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- liquid crystal
- indium
- acetone
- crystal display
- glass
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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 process for extracting indium from a waste liquid crystal display (LCD) screen. The process comprises the following steps of: 1) disassembling a waste LCD, removing plastic components, cables and the like and taking a liquid crystal glass box out; 2) leaching the liquid crystal glass box by using acetone, removing a polarizer and mechanically stripping off a glass substrate; 3) placing the stripped glass substrate in the acetone, distilling the acetone in which liquid crystals are dissolved after the leaching reaction is finished, and separating the liquid crystals from the acetone; 4) jointly leaching a glass sheet containing no liquid crystals by using solution of sulfuric acid and manganese dioxide to obtain indium-enriched solution; 5) extracting the indium in acid liquor by using an extracting agent, replacing a zinc strip and electrorefining to obtain product indium; and 6) selling the glass containing no indium and other glass together, conveying recovered liquid crystals to a special factory for centralized processing, and returning the distilled acetone to the original process for continuous use. In the method, an organic solvent is used for processing the liquid crystal glass box, so that the glass substrate of the liquid crystal display and the indium on an etching electrode can be recovered.
Description
Technical field
The present invention relates to the processing method that a kind of waste and old liquid crystal display is handled, thus particularly relate to a kind of adopt organic solvent treatment solution crystal display screen refine indium a kind of in the waste and old liquid crystal display processing method of refine indium.
Background technology
Liquid crystal display is widely used as the indicating meter of various information equipments.Thin flat liquid crystal display often has and is not more than several centimetres thickness, particularly liquid crystal display and has purposes widely, as is used for notebook computer, graphoscope, the instrument display monitor central monitoring system of space vehicle and aircraft etc.Because of many uses, cause waste and old liquid crystal display to pile up, the influence of environment is had duality: the one, the potentiality of environmental pollution, the 2nd, the resource that renewable resources is recycled.The treatment process of present waste and old liquid crystal display is too simple, mostly rest on disassembled simply, fuel, build the road, on the lower level such as backfill, production building materials, the product that lacks added value, deep processing, and various lots of comprehensive utilization of waste materials problem and show and obtain basic solution.
Summary of the invention
The invention provides a kind of at above-mentioned weak point, adopt organic solvent treatment solution crystal glass box, indium on can glass substrate, liquid crystal and the etched electrodes of complete recovery liquid-crystal display, the waste and old liquid crystal display of resource utilization at utmost, environmental benefit and social benefit are obvious.
The invention discloses a kind of in the waste and old liquid crystal display processing method of refine indium, 1) will discard LCD and disassemble, remove plastic components, cable etc., take out the liquid-crystalline glasses box;
2) utilize acetone leaching liquid crystal glass box, remove polaroid, the mechanically peel glass substrate;
3) after the glass substrate after will peeling off places acetone leaching reaction to finish, the acetone that is dissolved with liquid crystal is distilled, separate liquid crystal and acetone;
4) sheet glass that does not contain liquid crystal utilizes under sulphuric acid soln and the Manganse Dioxide and unites leaching, obtains being rich in the solution of indium;
5) indium in the acid solution extracts by extraction agent, the zink rod displacement, and electrorefining obtains the product indium.
The further method of the present invention is: described step 1) is disassembled by using the liquid-crystal display disassembling apparatus will discard LCD, removes plastic components, cable etc., takes out the liquid-crystalline glasses box.
The present invention further is described step 2) utilize acetone leaching liquid crystal glass box 4h.
The present invention further is that the glass substrate after described step 3) will be peeled off places acetone to leach 15min again.
The present invention further is again, and the sheet glass that described step 4) does not contain liquid crystal utilizes under 90 ℃ of the sulphuric acid soln of 200g/L and the Manganse Dioxide unites leaching, obtains being rich in the solution of indium.
Of the present invention a kind of in the waste and old liquid crystal display beneficial effect of the processing method of refine indium be: adopt organic solvent treatment solution crystal glass box, indium on can glass substrate, liquid crystal and the etched electrodes of complete recovery liquid-crystal display, the waste and old liquid crystal display of resource utilization at utmost, environmental benefit and social benefit are obvious.
Description of drawings
Fig. 1 is the schema of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby protection scope of the present invention is made more explicit defining so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that.
Be illustrated in figure 1 as the schema of the embodiment of the invention.A kind of in the waste and old liquid crystal display processing method of refine indium, it is characterized in that: described treatment process comprises the steps:
1) will discard LCD and disassemble, remove plastic components, cable etc., take out the liquid-crystalline glasses box;
2) utilize acetone leaching liquid crystal glass box 4h, remove polaroid, the mechanically peel glass substrate;
3) glass substrate after will peeling off places acetone to leach 15min, and reaction after finishing is distilled the acetone that is dissolved with liquid crystal, separates liquid crystal and acetone;
4) sheet glass that does not contain liquid crystal utilizes under 90 ℃ of the sulphuric acid soln of 200g/L and the Manganse Dioxide and unites leaching, obtains being rich in the solution of indium;
5) indium in the acid solution extracts by extraction agent, the zink rod displacement, and electrorefining obtains the product indium.
Described step 1) is disassembled by using the liquid-crystal display disassembling apparatus will discard LCD, removes plastic components, cable etc., takes out the liquid-crystalline glasses box.
Abovely the present invention is described in detail in conjunction with embodiment; only be explanation technical conceive of the present invention and characteristics; its purpose is to allow the people that is familiar with this technology understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (5)
1. the processing method of a refine indium in the waste and old liquid crystal display, it is characterized in that: described treatment process comprises the steps:
1) will discard LCD and disassemble, remove plastic components, cable etc., take out the liquid-crystalline glasses box;
2) utilize acetone leaching liquid crystal glass box, remove polaroid, the mechanically peel glass substrate;
3) after the glass substrate after will peeling off places acetone leaching reaction to finish, the acetone that is dissolved with liquid crystal is distilled, separate liquid crystal and acetone;
4) sheet glass that does not contain liquid crystal utilizes under sulphuric acid soln and the Manganse Dioxide and unites leaching, obtains being rich in the solution of indium;
5) indium in the acid solution extracts by extraction agent, the zink rod displacement, and electrorefining obtains the product indium.
2. according to claim 1 a kind of in the waste and old liquid crystal display processing method of refine indium, it is characterized in that: described step 1) is disassembled by using the liquid-crystal display disassembling apparatus will discard LCD, removes plastic components, cable etc., takes out the liquid-crystalline glasses box.
3. according to claim 1 a kind of in the waste and old liquid crystal display processing method of refine indium, it is characterized in that: described step 2) utilize acetone leaching liquid crystal glass box 4h.
4. according to claim 1 a kind of in the waste and old liquid crystal display processing method of refine indium, it is characterized in that: the glass substrate after described step 3) will be peeled off places acetone to leach 15min.
5. according to claim 1 a kind of in the waste and old liquid crystal display processing method of refine indium, it is characterized in that: the sheet glass that described step 4) does not contain liquid crystal utilizes under 90 ℃ of the sulphuric acid soln of 200g/L and the Manganse Dioxide unites leaching, obtains being rich in the solution of indium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102955907A CN102002591A (en) | 2010-09-28 | 2010-09-28 | Process for extracting indium from waste liquid crystal display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102955907A CN102002591A (en) | 2010-09-28 | 2010-09-28 | Process for extracting indium from waste liquid crystal display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102002591A true CN102002591A (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102955907A Pending CN102002591A (en) | 2010-09-28 | 2010-09-28 | Process for extracting indium from waste liquid crystal display screen |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951618A (en) * | 2011-08-31 | 2013-03-06 | 深圳市格林美高新技术股份有限公司 | Method for recycling germanium, gallium, indium and selenium in waste diode |
| CN103157646A (en) * | 2011-12-14 | 2013-06-19 | 深圳市格林美高新技术股份有限公司 | Comprehensive treatment method for waste liquid crystal display |
| CN103602815A (en) * | 2013-11-06 | 2014-02-26 | 四川长虹电器股份有限公司 | Method for recycling indium from waste liquid crystal displays |
| CN104498721A (en) * | 2015-01-08 | 2015-04-08 | 中国科学院城市环境研究所 | Innocent treatment method and system for liquid crystal panel |
| CN105648217A (en) * | 2014-11-12 | 2016-06-08 | 郭玉文 | Regeneration method of indium in panel of waste flat-panel display |
| CN107130112A (en) * | 2017-05-20 | 2017-09-05 | 合肥市惠科精密模具有限公司 | A kind of method of recovery indium in crystal display screen from waste liquid |
| CN108405551A (en) * | 2018-02-02 | 2018-08-17 | 西南科技大学 | The method that waste LCD polaroid is detached with glass substrate |
| CN108526196A (en) * | 2018-03-26 | 2018-09-14 | 华南理工大学 | A kind of method of quick stripping waste liquor crystal display polaroid |
-
2010
- 2010-09-28 CN CN2010102955907A patent/CN102002591A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951618A (en) * | 2011-08-31 | 2013-03-06 | 深圳市格林美高新技术股份有限公司 | Method for recycling germanium, gallium, indium and selenium in waste diode |
| CN102951618B (en) * | 2011-08-31 | 2014-07-30 | 深圳市格林美高新技术股份有限公司 | Method for recycling germanium, gallium, indium and selenium in waste diode |
| CN103157646A (en) * | 2011-12-14 | 2013-06-19 | 深圳市格林美高新技术股份有限公司 | Comprehensive treatment method for waste liquid crystal display |
| CN103157646B (en) * | 2011-12-14 | 2015-08-19 | 格林美股份有限公司 | A kind of integrated conduct method of waste liquid crystal display |
| CN103602815A (en) * | 2013-11-06 | 2014-02-26 | 四川长虹电器股份有限公司 | Method for recycling indium from waste liquid crystal displays |
| CN103602815B (en) * | 2013-11-06 | 2015-12-09 | 四川长虹电器股份有限公司 | The method of recovery indium from waste liquid crystal display |
| CN105648217A (en) * | 2014-11-12 | 2016-06-08 | 郭玉文 | Regeneration method of indium in panel of waste flat-panel display |
| CN105648217B (en) * | 2014-11-12 | 2017-07-04 | 郭玉文 | The renovation process of indium in a kind of useless flat-panel display panel |
| CN104498721A (en) * | 2015-01-08 | 2015-04-08 | 中国科学院城市环境研究所 | Innocent treatment method and system for liquid crystal panel |
| CN107130112A (en) * | 2017-05-20 | 2017-09-05 | 合肥市惠科精密模具有限公司 | A kind of method of recovery indium in crystal display screen from waste liquid |
| CN108405551A (en) * | 2018-02-02 | 2018-08-17 | 西南科技大学 | The method that waste LCD polaroid is detached with glass substrate |
| CN108526196A (en) * | 2018-03-26 | 2018-09-14 | 华南理工大学 | A kind of method of quick stripping waste liquor crystal display polaroid |
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Addressee: Suzhou Qunrui Environmental Protection Technology Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
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Application publication date: 20110406 |