recovery spent copper sulphate
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recovery spent copper sulphate

Copper recovery from copper(II) sulfate solutions by ...

May 01, 2002  Copper(II) in copper sulfate solutions can be reduced with various carbohydrates to obtain a copper powder. The favorable conditions for Cu 2+ reduction are intertwined with favorable conditions for hydrolysis and degradation of carbohydrates. The effect of various parameters on these conditions was tested in a series of autoclave experiments, where the copper concentration (2–20

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Copper recovery by the cementation method -

Nov 01, 1997  The cementation method was investigated for copper removal and recovery from sulphate-based electroplating waste solutions with a copper content up to 60 g/l, produced in the GALMAR plant in Poznar (Poland). To investigate the copper cementation from nitric acid medium the spent nitric acid solution formed during etching of copper in gold ...

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(PDF) Copper Recovery by the Cementation Method

Abstract. Cyanide-free, sulphate-based copper electroplating waste solutions and spent nitric acid. solutions from the etching of copper were investigated for copper recovery by cementation. It ...

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US20060196761A1 - Regeneration of cupric etchants and ...

Spent, acidic solutions comprising cupric chloride and hyrdrochloric acid from the copper etching process are regenerated by a process in which the acid is subjected to distillation with sulfuric acid. In one embodiment, the process comprises (a) providing a spent etchant comprising at least about 10% by weight chloride and at least about 5% dissolved copper; (b) adding at least about 2 moles ...

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Copper recovery by the cementation method -

Cyanide-free, sulphate-based copper electroplating waste solutions and spent nitric acid solutions from the etching of copper were investigated for copper recovery by cementation.

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How to Recover Copper from Solution

Mar 25, 2017  A soluble chloride is added to the sulphate solution of copper and the proper amount of sulphurous acid is added. Moderate heat under pressure—90° C. of heat—precipitated almost all the copper as sub-chloride. The subsequent process of obtaining the copper without volatilization and the recovery of the chlorine offered difficulties.

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Printed Circuit Board Recycling Methods

Figure 4: Recovery of copper hydroxide from copper sulfate solution in PTH process 3.6 Recovery of copper from the rack stripping process The stripping process is done to remove copper from the rack and uses nitric acid. The copper in the spent nitric acid is in the form of copper ion. Spent acidic etching solution press Reactor Spent basic

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PCB Recycling Methods - Engineering Technical -PCBway

Feb 28, 2014  Spent copper sulfate generated from PTH manufacturing contains copper ions at a concentration between 2-22 g/L. The spent solution is loaded into the reactor. The solution is agitated while the temperature is lowered by a chiller to 10-20°C, at which the copper sulfate

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US3400027A - Crystallization recovery of spent hydrogen ...

US3400027A US61679267A US3400027A US 3400027 A US3400027 A US 3400027A US 61679267 A US61679267 A US 61679267A US 3400027 A US3400027 A US 3400027A Authority US United States Prior art keywords solution copper hydrogen peroxide etching values Prior art date 1965-04-28 Legal status (The legal status is an assumption and is not a legal conclusion.

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Recovery of metallic values from spent ... - tandfonline

Jul 18, 2013  This work aimed to maximise the recovery of the reusable materials and thereby minimise the environmental impact resulting from end of life batteries. After digestion in sulphuric acid, copper was recovered with 96% recovery efficiency as copper sulphate (CuSO 4 .3H 2 O) with the addition of ethanol at a volume ratio of 3 : 1.

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Recovery of Copper from Copper Sulfide Concentrate by ...

Jan 17, 2015  ing temperature was found to have a significant effect on copper recovery. When there was no Na 2SO 3 added, copper extraction decreases rapidly above 550˚C due to the decomposition of copper sulfate to other less soluble compounds. Tumen and Bailey [4] [11] proposed this phenomenon as following reactions: 4 42 2 1 2CuSO CuO CuSO SO O 2

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(PDF) Recovery of Copper from Spent Solid ... - Academia.edu

of copper recovery. Studies on the cost-reduction aspects of Consequently, at 3A and 2A, the rate of copper deposition recycling spent nitric acid from the acid treatment step is could potentially overcome the rate of copper reoxidation. recommended as follow-up to this study.

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Cementation of copper from spent ... - ScienceDirect

Cementation of copper from spent copper-pickle sulfate solution by zinc ash ... A flow sheet was proposed and the investigated method was successfully applied for the recovery of copper from pickling solution resulting from a metal finishing plant which indicates the efficiency of zinc ash for the removal of copper from aqueous solutions ...

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Recovery of cupric chloride from spent ... - ResearchGate

Cyanide-free, sulphate-based copper electroplating waste solutions and spent nitric acid solutions from the etching of copper were investigated for copper recovery by cementation.

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Utilization of spent copper-pickle ... - ScienceDirect

Jul 01, 2001  The spent liquor contains 35 g l −1 copper, 25 g l −1 zinc, 1.1 g l −1 chromium, 45 g l −1 sulfuric acid, and 135 g l −1 total sulfate. These pollutant materials, if discharged directly into water bodies, pose acute environmental and ecological problems. Recovery and separation of these metals have been studied.

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Recovery of copper from electroplating and ... - Finishing

Recovery of copper from CuSO4 as a science experiment 2001. Q. To whom it may concern, I am a G.N.V.Q intermediate science student. I am doing an assignment, and the scenario for this assignment is: 'The chemical plant produces as a by-product a solution of copper sulphate, I am required to investigate the recovery of the copper from the solution'.

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(PDF) COMBINED ION EXCHANGE -SOLVENT ... - Academia.edu

Pregnant leach collect copper from the richer feed solutions. solution (PLS) forms as the acid solution percolates In the stripping stages, a spent electrolyte from the through the pile and dissolves copper minerals into electrowinning plant is contacted with the loaded the aqueous solution as copper sulphate.

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US3930847A - Recovery of copper by cementation - Google

US3930847A US05/451,497 US45149774A US3930847A US 3930847 A US3930847 A US 3930847A US 45149774 A US45149774 A US 45149774A US 3930847 A US3930847 A US 3930847A Authority US United States Prior art keywords copper iron cementation scrap recovery Prior art date 1974-03-15 Legal status (The legal status is an assumption and is not

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Producing Copper Powder from Copper Bleed Solution by ...

highly acidic solutions like copper electrolyte or the mother liquor from a copper sulfate plant. The paper presents the study on the development of a process based on hydrogen reduction as a useful method to reduce the total energy requirement for purifying spent copper electrolyte and to permit the recovery of copper as powders. EXPERIMENTAL

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Copper Sulphate Crystallization and MVR-Copper- - Metalcess

MVR (Mechanical Vapor Recompression) evaporation technology for copper sulphate crystal is noticeably advantageous in energy conservation, reducing energy cost by 3/4 compared with conventional two-effect evaporator. The key point is that the secondary steam can be recycled after enthalpy increase by mechanical compression, greatly decreasing the demand of fresh

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Recovery of platinum group metals ... - FreePatentsOnline

Matte which has preferably been ground to 100% less than 150 μm is first treated in an atmospheric leach step 12 in acidic nickel-copper sulphate solution at a temperature in the range of from about 75° to about 90° C., the acidic nickel-copper sulphate solution being recycled spent electrolyte solution from a copper electrowinning step ...

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Method of etching circuit boards ... - FreePatentsOnline

The present invention relates to a method of etching copper with a hydrogen peroxide-sulfuric acid etchant containing an acid soluble phosphonic acid in the manufacture of electronic circuits utilizing a masked copper surface and to a method of recovering the copper from the spent etch solution by electrolysis in solid continuous form saleable as electrolytic copper.

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Copper, zinc, and nickel recovery from printed circuit ...

Apr 16, 2021  This study focuses on the copper, zinc, and nickel recoveries from connection pins and microchips using ammonia–ammonium sulphate leaching solutions. Factors that influence recovery as the stirring rate, L/S ratio, amount of ammonia and ammonium sulphate, and the type of oxidant were assessed.

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How to Recover Copper from Solution

Mar 25, 2017  A soluble chloride is added to the sulphate solution of copper and the proper amount of sulphurous acid is added. Moderate heat under pressure—90° C. of heat—precipitated almost all the copper as sub-chloride. The subsequent process of obtaining the copper without volatilization and the recovery of the chlorine offered difficulties.

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Cementation of copper from spent copper-pickle sulfate ...

Cementation of copper from spent copper-pickle sulfate solution by zinc ash ... A flow sheet was proposed and the investigated method was successfully applied for the recovery of copper from pickling solution resulting from a metal finishing plant which indicates the efficiency of zinc ash for the removal of copper from aqueous solutions ...

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Recovery of cobalt sulfate from spent lithium ion ...

Recovery of cobalt sulfate from spent lithium ion batteries by ... impurities such as copper, iron, and aluminium were precipitated as hydroxides from solution by adjusting pH to 6.5. Cobalt was then selectively extracted from the purified aqueous phase by equilibrating with 50% saponified 0.4 M Cyanex 272 at an equilibrium pH ~6. ...

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(PDF) Electrochemical Recovery of Copper from Spent ...

In the present work the recovery of copper by electrowinning from the spent ammoniacal copper etchant is investigated as a function of the electrolyte agitation rate

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Method for etching copper and recovery of the spent ...

An etching and recovery method is described, wherein articles made of copper are etched with an acid aqueous solution of etching chemicals containing Cu 2+ for oxidizing Cu 0 to Cu +, chloride ions, oxidizing agent which oxidizes Cu + to Cu 2+, and pH-adjusting hydrochloric acid.The technical problem to be solved is to make it possible to circulate the etching solution

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Copper Sulphate Crystallization and MVR-Copper-

MVR (Mechanical Vapor Recompression) evaporation technology for copper sulphate crystal is noticeably advantageous in energy conservation, reducing energy cost by 3/4 compared with conventional two-effect evaporator. The key point is that the secondary steam can be recycled after enthalpy increase by mechanical compression, greatly decreasing the demand of fresh

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Producing Copper Powder from Copper Bleed Solution by ...

highly acidic solutions like copper electrolyte or the mother liquor from a copper sulfate plant. The paper presents the study on the development of a process based on hydrogen reduction as a useful method to reduce the total energy requirement for purifying spent copper electrolyte and to permit the recovery of copper as powders. EXPERIMENTAL

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Material List - PAHC

Copper sulfate (crystal) A blue crystal solid, often wet with sulfuric acid and containing traces of other metals. Generated by a centrifuge or crystallizer used to recover spent peroxide-sulfuric micro-etch solution in a printed circuit shop. Also produced by copper and brass fabricators using peroxide-sulfuric based pickle solution or bright dip.

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Copper Recovery - YouTube

Sep 10, 2016  Copper Recovery Lab IF you are looking for details, this lab can be found in Topic 14 Solutions at:https://chezchem/chez-chem-topics/ols/products/xn-top...

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Circularity at Intel Waste Recovery and Reuse November 2019

materials recovery. Some examples include: Moving our calcium fluoride waste from landfill to an ingredient component in cement product manufacturing Distillation and recovery of a lithography solvent for resale Recovery of semi-precious metals for metal recovery rather than sludge generation. Converting our spent sulfuric acid and

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CA2348494A1 - Process for the recovery of sulphur from ...

A process for recovery of substantially all the sulfur in a spent lead-acid battery as Na2SO4 is disclosed. The process comprises (a) breaking the batteries to remove the acid, (b) separating the plastic from the lead bearing materials, (c) smelting the lead bearing materials in a reverberatory furnace in an oxidizing atmosphere to volatilize most of the sulfur in the feed as SO2, (d ...

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Extracting copper from copper sulphate - YouTube

Quantitative experiment using moles.

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Recovery of Copper, Nickel and Zinc from Sulfate Solutions ...

Recovery of Copper, Nickel and Zinc from Sulfate Solutions S435 carried out extensively for the separation of cobalt and nickel with alkyl phosphorus reagents like Cyanex 272 and D2EHPA 2,3 .

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Cobalt Recovery from Waste Catalysts (Petroleum Refining ...

cobalt recovery, commercial waste Petroleum industry catalyst is used to recover cobalt content by roasting- leaching step. From the leach solution cobalt was pre- cipitated and redissolved in sulphuric acid which was used for electrolysis of cobalt recovery. This spent catalyst mostly consists of Mo, Co, Ni, Fe, Si, Al as their oxides.

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