CN106191867A - A kind of wiring board acidic etching waste liquid resource reusing method - Google Patents
A kind of wiring board acidic etching waste liquid resource reusing method Download PDFInfo
- Publication number
- CN106191867A CN106191867A CN201610721596.3A CN201610721596A CN106191867A CN 106191867 A CN106191867 A CN 106191867A CN 201610721596 A CN201610721596 A CN 201610721596A CN 106191867 A CN106191867 A CN 106191867A
- Authority
- CN
- China
- Prior art keywords
- copper
- sodium
- etching waste
- wiring board
- waste liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/46—Regeneration of etching compositions
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
- C22B15/0091—Treating solutions by chemical methods by cementation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The present invention relates to etching waste liquor recovery technology field during wiring board manufactures, particularly relate to a kind of wiring board acidic etching waste liquid resource reusing method: with the acidic etching waste liquid of containing copper chloride as raw material, copper ion (copper-removing method can be the sedimentation method, electrolysis, resin adsorption method) is removed by copper-removing method, remove the mother solution after copper, prepared the aqueous solution of chloracid sodium and sodium chloride by electrolysis, be back to etch system.Its feature is copper and the sodium chloride resource fully recovering of etching waste liquor, zero-emission, and environmental friendliness is good in economic efficiency；Etch system the most additionally adds the sub-liquid of etching or oxidant, it is achieved the online repeats itself of etch system, is substantially reduced the cost of etching.Saving the Crystallization Procedure of the feed purification in traditional handicraft and product in electrolysis waste solution prepares sodium chlorate technique, energy efficiency is high, and cost is lower simultaneously.
Description
Technical field
The present invention relates to etching waste liquor recovery technology field during wiring board manufactures, particularly relate to a kind of wiring board acidity erosion
Carve waste liquid resource reusing method.
Background technology
World technology is fast-developing, promotes the rise of circuit board etching industry, and acidic etchant is a big class etching body
System, discharges a large amount of cupric mother solution after etching, this is valuable resource, and insider has given the attention of height, it is proposed that permitted
Many effective methods reclaiming copper, such as CN103290415A, CN200610032589.9, CN 105016373.A,
CN201620528081.7 etc., but its main focus is all placed in the recovery of copper, and the useful one-tenth of other in etching waste liquor
Part, the online reuse such as resources such as sodium chloride then has no report.It is known that sodium chloride be industrially by sea water, salt lake saline,
Subsurface brine, rock salt extract, and are important industrial products.The present invention then utilizes sodium chloride-containing mother solution after various method copper removal,
It is converted into sodium chlorate by electrolysis, is back to etching work procedure, it is not necessary to add sub-liquid or oxidant again, cost-effective, it is achieved that
Produce line to circulate online.Sodium chlorate industrially produces existing more than hundred year, whole world annual production more than 3,000,000 tons at present, and China produces per year
Amount, at about 200,000 tons, is still establishing 100,000 tons/year, owing to sodium chlorate increases day by day in the demand of paper industry bleaching and sterilization industry, and supply and demand
Tighter.The acidic etching liquid chloracid sodium of wiring board industry need to be by market purchasing.Whole world production of sodium chlorate method employing in the majority is with chlorine
Changing sodium is raw material electrolytic method, and the present invention saves feed purification (such as removing calcium and magnesium sulfate radical) operation and chlorine in tradition sodium chlorate industry
Acid sodium Crystallization Procedure.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, and provide a kind of wiring board acidic etching waste liquid resource to return
By method, for the various sodium chloride-containing mother solutions of output during wiring board acidic etching waste liquid recovery copper, this mother solution compares
Pure, only need to remove trace copper, so that it may produce qualified sodium chlorate solution by electrolysis, then by the sedimentation method etc. except being back to erosion after chromium
Etching system.
For achieving the above object, the present invention adopts the following technical scheme that.
A kind of wiring board acidic etching waste liquid resource reusing method, reclaims whole copper resources by the sodium carbonate sedimentation method,
Copper rate of deposition reaches 99.9%, and cupric precipitate is used for preparing copper fine work, the mother solution sodium chloride-containing after cement copper, removes trace copper,
Then prepare the aqueous solution of chloracid sodium and sodium chloride by electrolysis, it is not necessary to make solid product, be again back to etching system
System, makes copper and the sodium chloride resource fully recovering of etching waste liquor.Mother solution income approach also includes that oxalic acid sinks the copper sedimentation method, carbonic acid alkali
Heavy the copper sedimentation method, hydroxide neutralization precipitation method, the most also include extracting copper extraction process, resin absorption copper extraction process, electrolysis copper extraction process
Deng.
Preferably, described cupric precipitate is used for preparing product, particularly for preparing copper chloride product, copper sulfate product
Product, basic carbonate copper products or copper oxide product, but it is not limited to above product.
Preferably, reclaiming the waste liquid that produces after copper can be all the molten of sodium chloride-containing and sodium chlorate by electrolysis electrolysis
Liquid, wherein in aqueous solution, sodium chloride, the concentration of sodium chlorate can pass through electrolytic process state modulator, the chlorination that electrolysis is returned completely
Sodium and sodium chlorate aqueous solution can be back to etch system after except chromium completely, are not required to any extra process.
Preferably, after described copper removal, filtrate removes trace copper, the sedimentation method or chelating resin exchange process can be used to prepare qualified
Liquid before electrolysis, wherein copper content can be down to below 5PPM.
Preferably, after described electrolysis prepares the aqueous solution of chloracid sodium and sodium chloride, use the sedimentation method except chromium or
Resin method removes chromium, chromium can be down to below 5ppm.
Preferably, described electrolytic liquid comprises ferrous chloride, sodium sulfite, nitrous acid except what chromium used except chromium precipitant
Sodium, lead chloride, barium chloride.The chromate reclaimed can be as pigment, without waste sludge discharge.
Preferably, described electrolysis prepares the aqueous solution of chloracid sodium and sodium chloride particularly as follows: eliminating minute copper stepmother
Liquid, adds the sodium dichromate of 0-10g/L, at 40-100 degree Celsius, makees anode, at current intensity 500 A/ with titanium plating ruthenium electrode
It is electrolysed under m2 4000 A/m2, and controls in reactor PH at 6.3-6.8, obtain its electrolysis stepmother's liquid density of sodium chlorate at 0-
600g/L。
Present invention have the beneficial effect that a kind of wiring board acidic etching waste liquid resource reusing method of the present invention, for line
The sodium chloride-containing mother solution of output during the board acidic etching waste liquor recovery copper of road, this mother solution is purer, can be without just refining
Available electrolysis produces qualified sodium chlorate solution and is back to etch system.
Accompanying drawing explanation
Accompanying drawing 1 is the technique quick-reading flow sheets of the present invention.
Accompanying drawing 2 is the detailed technological process of the present invention.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
A kind of wiring board acidic etching waste liquid resource reusing method of the present invention, its technique quick-reading flow sheets such as Fig. 1, acid etching
Waste liquid carries out copper removal, and then copper reclaims and produces mother solution, is electrolysed mother solution, forms reuse etching solution, and reuse etching solution is again
Secondary as acid etching waste liquid.Detailed technological process such as Fig. 2, acid etching waste liquid carries out copper removal, forms sodium carbonate and sinks copper, and sodium carbonate sinks copper
Forming crude product curpic carbonate and filtrate, then filtrate refines, and filtrate is electrolysed, and electrolytic liquid removes chromium, is then formed and is etched back to liquid, logical
Peracidity etching line again acts as acid etching waste liquid.
Required sodium carbonate liquor is placed in reactor, under room temperature and stirring condition, head tank adds acid etching
Waste liquid, controls reaction end of a period acidity, stirs 45 minutes, then filter sediment separate out (crude product curpic carbonate), and copper rate of deposition reaches
99.9%, crude product curpic carbonate can be used for preparing copper essence product；Mother solution sodium chloride-containing after cement copper, refines mother solution, then
Prepare the aqueous solution of chloracid sodium and sodium chloride by electrolysis, after chromium, it is not necessary to make solid product, be again back to etching
System, makes copper and the sodium chloride resource fully recovering of etching waste liquor.
Wherein, described mother solution subtractive process is:
Mother solution refines embodiment one, sinks after Copper treatment mother liquid obtained by acid etching waste liquid, its copper: 24ppm;Sodium chloride: 300g/
L；PH:7.5.By its liquid with hydrochloric acid regulate PH to about 2.0, stir even all, then with sodium hydroxide regulate PH to about 6.5,
Stirring is filtered after standing, filtrate after must refining, its: sodium chloride solution 298g/L;Copper 1.3PPM, PH:6.5.Prepare liquid before electrolysis.
Mother solution refines embodiment two: sink after Copper treatment mother liquid obtained by acid etching liquid waste processing, its copper: 30ppm;Chlorination
Sodium: 280g/L； PH:7.5.Passed through complex ion and handed over resin, obtained refinement mother liquor: sodium chloride: 270 g/L；PH:7.1；
Copper: 0.3ppm, then regulate to about 6.5 with sodium hydroxide, prepare liquid before electrolysis.
Wherein, described electrolysis sodium chlorate process is:
Electrolysis sodium chlorate embodiment one: take refined rear mother solution 5L, add the sodium dichromate of 3g/L, be warming up to about 85 degree, with
Titanium plating ruthenium electrode makees anode, is electrolysed, and controls in reactor PH at 6.3-under current intensity 500 A/m2 3000 A/m2
6.8, obtain its electrolytic liquid chloracid sodium 250g/L.
Electrolysis sodium chlorate embodiment two: take refined rear mother solution 5L, add the sodium dichromate of 5g/L, be warming up to 85 degree of left sides
The right side, makees anode with titanium plating ruthenium electrode, is electrolysed, and controls PH in reactor and exist under current intensity 500 A/m2 3000 A/m2
6.3-6.8, obtains its electrolytic liquid chloracid sodium 190g/L.
Wherein, described electrolytic liquid except chromium process is:
Electrolytic liquid removes chromium embodiment one: take electrolytic liquid 3L, its sodium chlorate 220g/L;Sodium dichromate 3g/L.Add 8g/L
Barium chloride, then adjust PH7-8, stir 30min, filter, obtain its filtrate: sodium chlorate 218g/L;Chromium: 3.2ppm.
Electrolytic liquid removes chromium embodiment two: take electrolytic liquid 3L, its sodium chlorate 240g/L;Sodium dichromate 3g/L.Add
The lead chloride of 8.4g/L, then adjust PH7-8, stirs 30min, filters, and obtains its filtrate: sodium chlorate 237g/L;Chromium: 2.9ppm.
Electrolytic liquid removes chromium embodiment three: take electrolytic liquid 3L, its sodium chlorate 240g/L;Sodium dichromate 3g/L.Except chromium
Resin absorption, obtain its exchange after liquid: sodium chlorate 115g/L;Chromium: 1.2ppm.
In sum, a kind of wiring board acidic etching waste liquid resource reusing method of the present invention, relate to containing copper chloride
Acidic etching waste liquid be raw material, reclaim whole copper resource by the sodium carbonate sedimentation method, copper rate of deposition reaches 99.9%, cupric
Precipitate can be used for preparing the products such as copper chloride.Mother solution sodium chloride-containing 200-320g/L after cement copper, prepares by electrolysis
Chloracid sodium and the aqueous solution of sodium chloride, it is not necessary to make solid product, be back to etch system.Its feature is etching waste liquor
Copper and sodium chloride resource fully recovering, zero-emission, environmental friendliness, good in economic efficiency.Tradition is saved in preparing sodium chlorate technique
Feed purification in technique and the Crystallization Procedure of product, energy efficiency is high, and cost is lower.Whole system need not as existing
Etch system also persistently to add the sub-liquid of etching, and the copper of etching waste liquor and sodium chloride resource all circulate to be reused, and this is individual
Brand-new flow process, zero-emission, environmental friendliness, good in economic efficiency.
The above is only the better embodiment of the present invention, thus all according to the structure described in present patent application scope,
The equivalence that feature and principle are done changes or modifies, in the range of being all included in present patent application.
Claims (9)
1. a wiring board acidic etching waste liquid resource reusing method, it is characterised in that: reclaim copper ion by copper-removing method, remove
Mother solution after copper, is mainly composed of sodium chloride solution, is prepared the aqueous solution of chloracid sodium and sodium chloride, reuse by electrolysis
In etch system, make copper and the sodium chloride resource fully recovering of etching waste liquor, it is achieved the online repeats itself of etch system.
2. a wiring board acidic etching waste liquid resource reusing method, it is characterised in that: etch system is the most additionally added
Etch sub-liquid or oxidant, it is achieved the online repeats itself of etch system, be substantially reduced the cost of etching.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 1, it is characterised in that: after copper removal
The mother solution of gained is not limited only to the purer mother solution of carbonate precipitation method gained, also includes sinking the copper sedimentation method, carbonic acid alkali by oxalic acid
Heavy the copper sedimentation method, hydroxide neutralization precipitation method, the most also include extracting copper extraction process, resin absorption copper extraction process, electrolysis copper extraction process
The purer mother solution of gained.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 1, it is characterised in that: described heavy
Shallow lake method gained cupric precipitate is used for preparing copper fine work product, particularly for preparing copper chloride product, copper sulfate product, alkali formula
Curpic carbonate product or copper oxide product.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 1, it is characterised in that: reclaim copper
The waste liquid of rear generation can be all electrolysed as sodium chloride-containing and the solution of sodium chlorate, wherein chlorination in aqueous solution by electrolysis
Sodium, the concentration of sodium chlorate can pass through electrolytic process state modulator completely, and sodium chloride and sodium chlorate aqueous solution that electrolysis is returned are complete
Entirely can be back to etch system, it is achieved the online repeats itself of etch system.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 1, it is characterised in that: after removing copper
Mother solution, can continue use soda acid adjust PH precipitation Filtration or chelating resin exchange process prepare liquid before qualified electrolysis, wherein copper contains
Amount is down to below 2PPM.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 1, it is characterised in that: described use
After electrolysis prepares the aqueous solution of chloracid sodium and sodium chloride, carry out electrolytic liquid and remove chromium, use the sedimentation method except chromium or resin
Method is removed, and chromium can be down to below 5ppm.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 7, it is characterised in that: described electricity
The precipitant that after solution, liquid uses except chromium comprises ferrous chloride, sodium sulfite, sodium nitrite, lead chloride, barium chloride.
A kind of wiring board acidic etching waste liquid resource reusing method the most according to claim 1, it is characterised in that: described use
Electrolysis prepares the aqueous solution of chloracid sodium and sodium chloride particularly as follows: refine rear electrolyte, adds the dichromic acid of 0-10g/L
Sodium, temperature, at 40-100 degree Celsius, is electrolysed under current intensity 0-4000 A/m2, obtains its electrolytic liquid density of sodium chlorate 0-
600g/L。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721596.3A CN106191867B (en) | 2016-08-25 | 2016-08-25 | A kind of route board acidic etching waste liquor resource reusing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721596.3A CN106191867B (en) | 2016-08-25 | 2016-08-25 | A kind of route board acidic etching waste liquor resource reusing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106191867A true CN106191867A (en) | 2016-12-07 |
| CN106191867B CN106191867B (en) | 2018-12-07 |
Family
ID=57524536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610721596.3A Active CN106191867B (en) | 2016-08-25 | 2016-08-25 | A kind of route board acidic etching waste liquor resource reusing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106191867B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354461A (en) * | 2017-09-13 | 2017-11-17 | 田成 | A kind of printed circuit board acidic etching waste liquor process for regenerating, recovering and reutilizing |
| CN108793546A (en) * | 2018-05-24 | 2018-11-13 | 汶川县湘宁氯酸盐有限责任公司 | Prepare the method that sodium chloride is recycled in sodium chlorate waste water |
| CN115466957A (en) * | 2021-08-19 | 2022-12-13 | 叶涛 | Electrolytic regeneration method and device for precipitating and taking copper from acidic copper chloride etching waste liquid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534111A (en) * | 2003-03-28 | 2004-10-06 | 巫协森 | Method of recovering copper metal from waste printed circuit board and copper containing waste liquid and its device |
| CN101748430A (en) * | 2009-09-23 | 2010-06-23 | 王红华 | Copper recovery system of printed board acid etching waste solution and etching solution regeneration method |
| CN102732888A (en) * | 2012-07-19 | 2012-10-17 | 湖南万容科技股份有限公司 | Method and system for regenerating and recycling acidic etching waste liquor |
| CN102912352A (en) * | 2012-11-08 | 2013-02-06 | 上海绿澄环保科技有限公司 | Method for recycling acidic copper-etching waste solution |
| CN103602988A (en) * | 2013-10-30 | 2014-02-26 | 中国科学院过程工程研究所 | Resourceful treatment and cyclic utilization method of PCB circuit board waste etching liquid |
| CN104611703A (en) * | 2014-12-26 | 2015-05-13 | 锦州清源嘉华环保科技有限公司 | Device and method for regenerating PCB etching waste liquid and recycling heavy metal |
| CN105314668A (en) * | 2015-11-23 | 2016-02-10 | 东莞市广华化工有限公司 | Method for recovering basic cupric carbonate from circuit board acid etching waste liquor |
-
2016
- 2016-08-25 CN CN201610721596.3A patent/CN106191867B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534111A (en) * | 2003-03-28 | 2004-10-06 | 巫协森 | Method of recovering copper metal from waste printed circuit board and copper containing waste liquid and its device |
| CN101748430A (en) * | 2009-09-23 | 2010-06-23 | 王红华 | Copper recovery system of printed board acid etching waste solution and etching solution regeneration method |
| CN102732888A (en) * | 2012-07-19 | 2012-10-17 | 湖南万容科技股份有限公司 | Method and system for regenerating and recycling acidic etching waste liquor |
| CN102912352A (en) * | 2012-11-08 | 2013-02-06 | 上海绿澄环保科技有限公司 | Method for recycling acidic copper-etching waste solution |
| CN103602988A (en) * | 2013-10-30 | 2014-02-26 | 中国科学院过程工程研究所 | Resourceful treatment and cyclic utilization method of PCB circuit board waste etching liquid |
| CN104611703A (en) * | 2014-12-26 | 2015-05-13 | 锦州清源嘉华环保科技有限公司 | Device and method for regenerating PCB etching waste liquid and recycling heavy metal |
| CN105314668A (en) * | 2015-11-23 | 2016-02-10 | 东莞市广华化工有限公司 | Method for recovering basic cupric carbonate from circuit board acid etching waste liquor |
Non-Patent Citations (2)
| Title |
|---|
| 方贤达: "《氯的含氧化合物生产与运用》", 29 February 2004, 化学工业出版社 * |
| 李九岭: "《热镀锌实用数据手册》", 30 April 2012, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354461A (en) * | 2017-09-13 | 2017-11-17 | 田成 | A kind of printed circuit board acidic etching waste liquor process for regenerating, recovering and reutilizing |
| CN108793546A (en) * | 2018-05-24 | 2018-11-13 | 汶川县湘宁氯酸盐有限责任公司 | Prepare the method that sodium chloride is recycled in sodium chlorate waste water |
| CN108793546B (en) * | 2018-05-24 | 2021-11-19 | 山东中天国际工程有限公司 | Method for recovering sodium chloride from sodium chlorate wastewater |
| CN115466957A (en) * | 2021-08-19 | 2022-12-13 | 叶涛 | Electrolytic regeneration method and device for precipitating and taking copper from acidic copper chloride etching waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106191867B (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106587105B (en) | The recovery method of copper chloride acid etching liquid in a kind of printed circuit board | |
| CN111560615B (en) | Method for on-line recovery of copper and chlorine from acidic etching waste liquid and regeneration of etching liquid | |
| CN103966607A (en) | Method for recovering copper and hydrochloric acid from acid etching solution | |
| CN106319519B (en) | A kind of method that tin stripping liquid and electrotinning are prepared using spent solder stripper cycle | |
| CN106191867B (en) | A kind of route board acidic etching waste liquor resource reusing method | |
| WO2020162796A2 (en) | Method for producing high-purity lithium hydroxide monohydrate | |
| CN107674975A (en) | Method for separating and recovering cobalt and manganese in cobalt-manganese waste | |
| CN111170340A (en) | Method for recovering salt and nitrate from salt and nitrate waste brine | |
| CN103382033B (en) | A kind of substep extracts the technique of the solid matter of salt refining process generation | |
| CN106186437A (en) | A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon | |
| CN106637215B (en) | Method for recycling electrolytic oxidant of circuit board acidic etching waste liquid resource | |
| CN107628674A (en) | The categorised collection of resin tower regenerated liquid utilizes technique | |
| JPH033747B2 (en) | ||
| CN102092880B (en) | Process for freezing and denitriding primary brine with membrane method in polyvinyl chloride production | |
| CN106086460A (en) | A kind of from acid CuCl2the method reclaiming copper by-product polymerizing aluminum chloride in etching waste liquor | |
| CN102628105A (en) | Method for comprehensively recycling and using baric waste slag in refined aluminum production process | |
| GB1154420A (en) | Process for Recovering Mercury From a Sludge produced during Electrolysis of Alkali Chloride in a Mercury Cell | |
| US4265718A (en) | Method for producing hydroxylated nickel compounds | |
| CN112673119A (en) | Improved lithium processing method | |
| JPS61101416A (en) | Purification of saline water | |
| CN209113650U (en) | A kind of secondary steam condensate liquid recovery system | |
| CN109354047A (en) | A method of preparing high-purity magnesium oxide | |
| CN101235510A (en) | Method for removing SO4(2-) ion in ionic film electrolysis sodium hydroxide light salt water | |
| CN214936736U (en) | Salt dissolving system for seawater desalination concentrated seawater for chlor-alkali industry | |
| CN108100995A (en) | The synthetical recovery processing method of liquid after a kind of aluminium displacement sponge indium containing indium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220126 Address after: 523000 No. 1 * Sha Dong Road, Shatian Town, Dongguan City, Guangdong Province Patentee after: Dongguan Xiubo Electronic Material Co.,Ltd. Address before: 523000 Dongguan Guanghua Chemical Co., Ltd., wokou, Jiuqu village, Daojiao Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN GUANGHUA CHEMICAL Co.,Ltd. |