CN109293118A - Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- - Google Patents
Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- Download PDFInfo
- Publication number
- CN109293118A CN109293118A CN201811409933.0A CN201811409933A CN109293118A CN 109293118 A CN109293118 A CN 109293118A CN 201811409933 A CN201811409933 A CN 201811409933A CN 109293118 A CN109293118 A CN 109293118A
- Authority
- CN
- China
- Prior art keywords
- copper
- copper foil
- foil production
- corrosion
- reverse osmosis
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
- C01G3/10—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses copper foil production wastewaters to recycle the corrosion-resistant evaporation technique of zero discharge of high-purity copper-, including the following steps: (1) copper foil production wastewater is through impurity such as filtering removal gelatin, suspended matters；(2) waste water is concentrated through second level high efficient reverse osmosis device after cartridge filter；(3) concentrate is extracted with P507 copper extractant (using kerosene as diluent), and high-purity copper must be refined after being stripped with sulfuric acid and returns copper foil production line；(4) raffinate water phase sodium hydroxide pellets collect filter residue through filters pressing, and filtrate is concentrated through second level reverse osmosis apparatus again；(5) cupro-nickel, chromium plasma, mainly sodium sulfate salt are free of into the solution of evaporated crystallization device, corrosivity reduces；(6) the water resource reuse that reverse osmosis unit and vaporising device generate, realizes wastewater zero discharge.The copper sulphate and water resource of high-purity can be recycled in the present invention, while reducing the cost of investment of evaporation equipment, and prevented discharging of waste liquid, free from environmental pollution.
Description
Technical field
The present invention relates to copper foil production wastewater or the recoverying and utilizing method technical field of other copper-containing wastewaters, especially copper foils
Produce Sewage treatment high-purity copper-corrosion-resistant evaporation technique of zero discharge.
Background technique
Electrolytic copper foil is the important material of the electronics and information industries such as printed circuit board, copper-clad plate, with electronics and information industry
High speed development, the market demand of electrolytic copper foil is not also increasing.Electrolytic copper foil production process is made of first by cathode copper
Copper-bath, then the electrolytically generated foil in foil machine, foil are handled and finished product using electroplating surface.Each road work
In sequence, there will be water-washing process, thus generate a considerable amount of poaching wastewaters,.In waste water, Cu2+ concentration range is 0.2-
0.8g/L, and containing part SO42- and micro Zn2+, Cr3+, Ni2+ etc., content is usually no more than 10mg/L, and pH exists
3.0-4.5 left and right.This kind of waste water is unable to direct emission.The effluent containing heavy metal ions treatment process such as cupric has very much, such as: physics
Absorption method, ion-exchange, evaporation concentration method, chemical precipitation method, oxidation-reduction method, biochemical treatment process, membrane separation process, etc..
Some enterprises are by displacement reaction or flocculant is added, and copper is precipitated and is recycled, but the recovery utilization rate of copper is low, and impurity content is more,
Purity is low, cannot be reused for electrolytic copper foil production, and the added value for recycling copper is low；And it is unstable to handle wastewater effluent, water money
Source does not recycle；By after waste water film process, concentrate through evaporation process, evaporates mentioned abraum salt as solid again for some enterprises
The processing of body dangerous waste object.Since vaporising device is made by materials such as stainless steels mostly, when copper-containing wastewater is directly evaporated, copper and steaming
Iron in transmitting apparatus forms primary battery, so that the corrosion of acceleration equipment, seriously affects the stainless steel vaporising device service life.Mantoquita thus
Direct vaporising device must be raw material production with more corrosion resistant titanium, to greatly increase the manufacturing cost of vaporising device, add
The investment and operating cost of weight scale wastewater treatment.There are also enterprises by extraction and recovery copper, but raffinate again after Waste water concentrating
The concentration of foreign ion is continuously improved in cyclic process, the final purity for influencing recycling copper.104961197 A of patent CN is announced
A kind of water-saving Copper foil treatment process and device, the concentrated water after reverse osmosis treatment recycle copper ion, fresh water reuse, but
There are the interference problems of Zn2+, Cr3+, Ni2+ and other impurities ion.Patent CN10388364A discloses a kind of copper foil production
The recoverying and utilizing method of waste water, by copper foil production wastewater it is concentrated-extracting-back extraction-electrolysis after obtain finished product copper, the method is right
Water carries out reuse, and there is also the emission problems containing effluent containing heavy metal ions such as Zn2+, Cr3+, Ni2+.Patent CN 1962469A
The method for being related to recycling acid waste water in electrolytic copper foil production with membrane separation technique realizes water using reverse osmosis membrane separation technology
Reuse and copper recycling, but do not refer to the heavy metal ion such as Zn2+, Cr3+, Ni2+ contained in waste water during processing
Accumulation finally will affect effective operation of system.
Thus, it would be highly desirable to research and develop one kind can high efficiente callback copper, and the copper foil for having environmental protection in mind that can recycle water resource is raw
Produce wastewater processing technology.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the present invention provides a kind of copper foil production wastewaters to recycle high-purity sulphuric acid
Copper-containing wastewater is concentrated with membrane technology in the corrosion-resistant evaporation technique of zero discharge of copper-, and by the copper ion extracting and refining in concentrate at height
Copper foil production line is returned after pure copper sulphate, then the precipitation by metallic ion such as Zn2+, Cr3+, Ni2+ are converted into sodium sulphate, through film skill
Again through MVR or other evaporation techniques after art concentration, to mitigate the corrosion of evaporation equipment, the manufacturing cost of evaporation equipment is reduced, it is real
The recycling of existing Cu in waste water, realizes the treatment process of wastewater zero discharge.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper-, including the following steps:
(1) adjusting copper foil production wastewater pH value is 4.0-4.5, with the gelatin in more medium filter removal waste water, suspension
The impurity such as object；
(2) Cu in waste water ion concentration is improved to 1.0-8g/L, fresh water reuse with reverse osmosis unit concentration waste water；
(3) copper sulphate in concentrate is extracted with the agent of P507- kerosene extraction, and is stripped with the sulfuric acid of 200g/L, obtained high
Pure refined sulfuric acid copper returns to copper foil production line；
(4) filtrate after extracting copper, it is 9 or so that adding sodium hydroxide, which adjusts pH value, makes other gold such as Zn2+, Cr3+, Ni2+
Belong to ion precipitation, is separated by filtration；
(5) salt in filtrate is mainly sodium sulphate, is further concentrated into sodium sulfate concentration to 5%- with reverse osmosis unit
10% or so, it is evaporated crystallization into vaporising device, collects solid salt, recycling condensing water.
To further description of the present invention, in the step (1), adjusting pH is 4.0-4.5, the gelatin, suspended matter etc.
Impurity is filtered with more medium filters such as quartz sand-silica gel and is removed.
To further description of the present invention, in the step (2), reverse osmosis film used is Dow Chemical
The FILMTECTM richness film of resistance to TMXC-80, second level segmentation concentration, 4 times of primary concentration, 8 times of secondary concentration.
With P507- kerosene volume ratio it is 1:(4.0-6.0 in the step (3) to further description of the present invention) extraction
Agent extracts copper ion, is stripped with the sulfuric acid of 200g/L.
To further description of the present invention, raffinate water phase in the step (4) after extracting copper, adjusting control pH is 9, is made
The heavy metal ion such as Zn2+, Cr3+, Ni2+ precipitating.
To further description of the present invention, in the step (5), sodium sulfate concentration further is concentrated into reverse osmosis unit
To 5%-10% or so, reverse osmosis film used is the rich film of resistance to TMXC-80 of Dow Chemical FILMTECTM.
Compared with prior art, advantages of the present invention:
1. low concentration mantoquita prepares high purity copper sulfate in high efficiente callback copper foil production wastewater, and recycles ionized water；
2. other heavy metal ion in concentrate are thoroughly precipitated, then filtrate is further concentrated with RO after recycling copper
After be evaporated, by must higher operating costs titanium be raw material evaporation equipment, conversion cost is relatively low with 316L
The evaporation equipment of stainless steel making substantially reduces equipment input cost and evaporation operating cost, and makes evaporation gained crystal salt not
Containing heavy metal ion, solid waste processing cost is reduced.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Below in conjunction with attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that is retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
Embodiment 1, copper foil production wastewater recycle the corrosion-resistant evaporation technique of zero discharge of high-purity copper-, as shown in Figure 1:
(1) copper foil production wastewater will be collected in wastewater disposal basin, into pH conditioning tank, being adjusted to pH is 4.5, is made bright in water
Glue is in suspended state, but copper ion does not precipitate.By being pumped to more medium filter filtering, the suspended matter and glue in water removal are removed
Body, and after cartridge filter is handled, reach reverse osmosis requirement.
(2) through the filtered filtrate of cartridge filter, into two sections of reverse osmosis units of level-one.Reverse osmosis unit is light out
Water, into recovery tank, the pure water system for finally entering factory is further purified, and effluent quality is made to reach the requirement of copper foil production,
Concentrated water enters two-pass reverse osmosis concentration, and two-stage two-segment reverse osmosis unit cupric concentrate enters concentration liquid bath out.Membrane separation process
In, reverse osmosis membrane is using the rich film of resistance to TMXC-80 of Dow Chemical FILMTECTM, and first-stage reverse osmosis device is by 4 times of Waste water concentrating
Left and right, second level reverse osmosis apparatus is by 8 times of Waste water concentrating or so.
(3) concentrate after second level reverse osmosis apparatus is concentrated is 1:(4.0~6.0 with P507: kerosene) (volume ratio)
Extractant extracts in two times, and organic by separation is added to the sulfuric acid solution that concentration is 200g/L and is stripped, and obtains smart sulphur
Sour copper solution returns to copper foil processing workshop section and uses.It is re-used after organic phase regeneration.
(4) it is 9 or so that the raffinate water phase adding sodium hydroxide after extracting copper ion, which adjusts pH value, makes Zn2+、Cr3+、Ni2+Deng
Other precipitation by metallic ion collect the filter residue containing heavy metal ion after filters pressing.At this point, the salt in filtrate is mainly sulfuric acid
Sodium has removed most of heavy metal ion salt and other carnallites through front process.Filtrate is further used into reverse osmosis unit
Sodium sulfate concentration is concentrated into 5%-10% or so, vaporising device can be entered and be evaporated crystallization, traditional multiple-effect can be used
Evaporation technology and MVR vaporising device, in the enterprise for having residue steam, preferential uses multiple-effect evaporation technique, needs outsourcing steam
Enterprise, preferential recommendation MVR vaporising device.Salt separating treatment in solid form can will successfully be contained by evaporation
Copper solid dangerous waste object is changed into the common solid waste of sulfur acid sodium, and evaporation condensed water is returned to return water tank, reaches waste liquid zero
Discharge.
It is tested through our company, Zn in waste water2+、Cr3+、Ni2+Best precipitating pH range be respectively 9~10,8~9, > 8, therefore
PH value is controlled 9 or so with sodium hydroxide, heavy metallic salt can be made to precipitate, concentration is no more than 0.05mg/L in clear liquid.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized with other specific patterns.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper-, which is characterized in that including following step
It is rapid:
(1) adjusting copper foil production wastewater pH value is 4.0-4.5, with gelatin, the suspended matter etc. in more medium filter removal waste water
Impurity；
(2) Cu in waste water ion concentration is improved to 1.0-8g/L, fresh water reuse with reverse osmosis unit concentration waste water；
(3) copper sulphate in concentrate is extracted with the agent of P507- kerosene extraction, and is stripped with the sulfuric acid of 200g/L, obtain high-purity essence
Sulphuric acid copper returns to copper foil production line；
(4) filtrate after extracting copper, adding sodium hydroxide adjust pH value be 9 or so, make other metals such as Zn2+, Cr3+, Ni2+ from
Son precipitating, is separated by filtration；
(5) salt in filtrate is mainly sodium sulphate, is further concentrated into sodium sulfate concentration to 5%-10% with reverse osmosis unit
Left and right is evaporated crystallization into vaporising device, collects solid salt, recycling condensing water.
2. a kind of copper foil production wastewater according to claim 1 recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper-,
It is characterized in that, adjusting pH is 4.0-4.5, the impurity such as the gelatin, suspended matter quartz sand-silica gel etc. in the step (1)
More medium filter filtering removal.
3. a kind of copper foil production wastewater according to claim 1 or claim 2 recycles the corrosion-resistant evaporation zero-emission work of high-purity copper-
Skill, which is characterized in that in the step (2), reverse osmosis film used is the rich film of resistance to TMXC-80 of Dow Chemical FILMTECTM,
Second level segmentation concentration, 4 times of primary concentration, 8 times of secondary concentration.
4. a kind of copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper-according to claim 3,
It is characterized in that, with P507- kerosene volume ratio is 1:(4.0-6.0 in the step (3)) extractant extracts copper ion, use 200g/L
Sulfuric acid back extraction.
5. a kind of copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper-according to claim 4,
It is characterized in that, the raffinate water phase in the step (4) after extracting copper, adjusting control pH is 9, makes the huge sum of money such as Zn2+, Cr3+, Ni2+
Belong to ion precipitation.
6. a kind of copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper-according to claim 5,
It is characterized in that, in the step (5), is further concentrated into sodium sulfate concentration to 5%-10% or so with reverse osmosis unit, reverse osmosis
Film used is the rich film of resistance to TMXC-80 of Dow Chemical FILMTECTM thoroughly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811409933.0A CN109293118A (en) | 2018-11-23 | 2018-11-23 | Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811409933.0A CN109293118A (en) | 2018-11-23 | 2018-11-23 | Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109293118A true CN109293118A (en) | 2019-02-01 |
Family
ID=65143970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811409933.0A Pending CN109293118A (en) | 2018-11-23 | 2018-11-23 | Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109293118A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266094A (en) * | 2020-09-25 | 2021-01-26 | 陕西汉和新材料科技有限公司 | Electrolytic copper foil washing water treatment method |
| CN113526542A (en) * | 2021-06-03 | 2021-10-22 | 张华� | Method for removing fluorine and chlorine in zinc sulfate solution |
| CN114990645A (en) * | 2022-06-30 | 2022-09-02 | 深圳惠科新材料有限公司 | Copper sulfate crystal recovery device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088364A (en) * | 2013-02-07 | 2013-05-08 | 灵宝华鑫铜箔有限责任公司 | Recycling method of copper foil production wastewater |
| CN105502787A (en) * | 2015-12-23 | 2016-04-20 | 倍杰特国际环境技术股份有限公司 | Zero emission treatment method of high-salinity wastewater |
| CN105803204A (en) * | 2014-12-31 | 2016-07-27 | 胡桂生 | Heavy metal-containing waste liquid purifying and impurity removing method and composite set thereof |
-
2018
- 2018-11-23 CN CN201811409933.0A patent/CN109293118A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088364A (en) * | 2013-02-07 | 2013-05-08 | 灵宝华鑫铜箔有限责任公司 | Recycling method of copper foil production wastewater |
| CN105803204A (en) * | 2014-12-31 | 2016-07-27 | 胡桂生 | Heavy metal-containing waste liquid purifying and impurity removing method and composite set thereof |
| CN105502787A (en) * | 2015-12-23 | 2016-04-20 | 倍杰特国际环境技术股份有限公司 | Zero emission treatment method of high-salinity wastewater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266094A (en) * | 2020-09-25 | 2021-01-26 | 陕西汉和新材料科技有限公司 | Electrolytic copper foil washing water treatment method |
| CN113526542A (en) * | 2021-06-03 | 2021-10-22 | 张华� | Method for removing fluorine and chlorine in zinc sulfate solution |
| CN113526542B (en) * | 2021-06-03 | 2023-05-05 | 张华� | Method for removing fluorine and chlorine in zinc sulfate solution |
| CN114990645A (en) * | 2022-06-30 | 2022-09-02 | 深圳惠科新材料有限公司 | Copper sulfate crystal recovery device and method |
| CN114990645B (en) * | 2022-06-30 | 2024-04-16 | 深圳惠科新材料股份有限公司 | Copper sulfate crystal recovery device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | Water balance analysis and wastewater recycling investigation in electrolytic manganese industry of China—a case study | |
| CN102603097B (en) | Advanced treatment and recycling process for wastewater containing heavy metal ions | |
| CN203904113U (en) | Classified treatment equipment for sewage | |
| CN103819023B (en) | Treatment and recycling method of industrial wastewater containing a plurality of heavy metal ions | |
| CN102557299B (en) | Recovery method of copper-nickel heavy metals in electroplated mixed-flow waste water | |
| CN101648757B (en) | Recycling processing method for stainless steel processing process wastewater grading precipitation | |
| CN102329030B (en) | Treatment method of chemical nickel-plating wastewater | |
| CN108070720B (en) | A kind of comprehensive recovering process of tin removal waste liquor | |
| CN109293118A (en) | Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- | |
| CN101608336A (en) | A kind of method that realizes electric plating sludge resource | |
| CN101798131A (en) | High-efficiency electroplating wastewater treatment and resource utilization device | |
| CN106882884A (en) | A kind of method of chlorion in recycling waste water | |
| CN103924085A (en) | Method for recovering copper zinc nickel from heavy metal sludge by using copper smelting waste acid | |
| CN108529789B (en) | Method for treating copper-containing electroplating wastewater and recovering copper by using sulfide precipitation method | |
| CN103936081A (en) | Method and system for preparing ferric chloride, electrodeposited copper and copper powder from copper-containing hydrochloric acid waste liquid | |
| CN102912133A (en) | Method for classifying and purifying heavy metals in electroplating sludge | |
| CN105198125A (en) | Method for treating hexavalent chromium ions in industrial wastewater | |
| CN112941562B (en) | Combined treatment method for copper-containing sludge and copper-containing etching waste liquid | |
| CN110921887A (en) | Electroplating wastewater recycling treatment method | |
| CN101935126B (en) | Combined treatment method for electro-deposition and membrane separation of zinc-containing heavy metal waste water | |
| CN103771634A (en) | Treatment method of reactive brilliant blue KN-R mother liquor wastewater | |
| CN102925899A (en) | Method for refining copper chloride etching waste liquor | |
| CN109576494B (en) | Method for preparing sodium sulfate by utilizing metal surface treatment waste | |
| CN1769543A (en) | Water comprehensive utilization technology for cleaning electroplating nickel | |
| TWI285632B (en) | Sewage treatment-recycling system for PCB manufacturing process and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190201 |