CN103882231A - Method for extracting gold from electronic wastes by using novel microemulsion - Google Patents

Method for extracting gold from electronic wastes by using novel microemulsion Download PDF

Info

Publication number
CN103882231A
CN103882231A CN201410058926.6A CN201410058926A CN103882231A CN 103882231 A CN103882231 A CN 103882231A CN 201410058926 A CN201410058926 A CN 201410058926A CN 103882231 A CN103882231 A CN 103882231A
Authority
CN
China
Prior art keywords
gold
microemulsion
concentration
hydrochloric acid
ion
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
Application number
CN201410058926.6A
Other languages
Chinese (zh)
Inventor
周千里
王子涵
张擎昊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201410058926.6A priority Critical patent/CN103882231A/en
Publication of CN103882231A publication Critical patent/CN103882231A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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

Abstract

The invention relates to a method for extracting gold from electronic wastes by using a novel microemulsion. The method for extracting the gold from the electronic wastes comprises the steps of firstly, treating the electronic wastes, crushing, drying, adding aqua regia into the crushed and dried electronic wastes, then evaporating the aqua regia, adding hydrochloric acid for treatment, evaporating the hydrochloric acid solution, adding deionized water and filtering to obtain a Au(III) ion filtrate; dissolving [C14mim] Br into a mixed phase of cyclohexane and hexanol in a volume ratio of 7:3, then adding HCl for treatment, separating an organic phase from a hydrochloric acid aqueous phase to form the microemulsion, preparing a gold ion working solution of Au(III) ions and an HCl solution, mixing the gold ion working solution and the microemulsion, and extracting gold ions while oscillating. The invention provides a basis of applying a [C14mim] Br/cyclohexane/hexanol/hydrochloric acid microemulsion system to industrial gold extraction, so that the electronic wastes are treated, and noble metallic gold can be recycled.

Description

The extracting method of a kind of novel microemulsion to gold in electron wastes
Affiliated technical field
The present invention relates to the extracting method of gold in a kind of electron wastes, particularly the extracting method of a kind of novel microemulsion to gold in electron wastes.
Background technology
We live in the scientific and technological water epoch of length fast, and the development of all trades and professions all be unable to do without the auxiliary of electronic product.And quick new replacement of electronic product brought serious problem---electron wastes, it does not have clear and definite technological standard to define, and broadly says, electronic product that discard or that can not re-use all belongs to electron wastes.Such as: the televisor of scrapping, superseded old computer, old refrigerator, microwave oven, discarded mobile phone etc.When these electron wastes constantly produce, they contain a large amount of hazardous and noxious substances on the one hand, serious harm human health, and they contain again a large amount of Nonrenewable resources on the other hand, are threatening atrociously day by day exhausted earth resources.In July, 2012, combine studies show that of initiation by United Nations University with the sustainable proposal of global electronic, the far super gold mine average grade of gold content ratio in electronic waste, this part of research purpose is to utilize data to promote the environmental protection concept that electronic waste reclaims.
Summary of the invention
Object of the present invention will contain ionic liquid [C 14mim] the novel microemulsion of Br is applied to golden separating and extracting, realizes golden recycling.
The novel microemulsion involved in the present invention extracting method to gold in electron wastes, adopts following steps:
(1) electronic devices and components in dismounting electron wastes, pulverize oven dry by electron wastes;
(2) in electron wastes, add chloroazotic acid, stir and keep after temperature of reaction is 90 degree with heating jacket for 2 hours simultaneously, rising temperature of reaction is evaporated to chloroazotic acid dry, adding concentration is the hydrochloric acid soln of (1+1), stir 30 minutes, again sending to dryly, filter after adding deionized water after cooling, filtrate is Au (III) ion filtrate, measures the concentration of Au (III) ion of filtrate;
(3) by [C 14mim] Br adds the hexanaphthene of V%=70%, and in the mixed phase of V%=30% n-hexyl alcohol, ultrasonic agitation is by [C 14mim] Br is dissolved as mixing organic phase, adds HCl until produce water to mixing in organic phase, leaves standstill 12 hours, separates organic phase and hydrochloric acid water, within centrifugal 5 minutes under 2000 r/min conditions, do not have layering to form microemulsion organic phase;
(4) the gold ion working fluid of preparation Au (III) ion and HCl solution, the concentration of Au (III) is 0.5 g/L, will after gold ion working fluid and micro emulsion liquid-phase mixing, shake extracting gold ion.
According to a preferred embodiment of the invention a, [C in described microemulsion 14mim] concentration of Br is 8～10 g/L.
According to a preferred embodiment of the invention a, described mixes gold ion working fluid with microemulsion phase, controls water and milk than being 5:1, and mixing the concussion time is 8 minutes.
According to a preferred embodiment of the invention a, described adds HCl until produce in water process to mixing in organic phase, and the concentration of hydrochloric acid is 1～2 mol/L.
The extracting method of novel microemulsion of the present invention to gold in electron wastes, its outstanding feature is: providing will [C 14 mim] Br/ hexanaphthene/normal hexane/hydrochloric acid microemulsion system is applied to the foundation that industry gold extracts, and has not only processed electron wastes, more can recycle Precious Metals-Gold.
brief description of the drawings
?fig. 1 is [C 14mim] concentration of the Br schematic diagram that affects on golden percentage extraction.
Fig. 2 is the affect schematic diagram of extraction time on golden percentage extraction.
Fig. 3 is the schematic diagram that affects of water and milk comparison percentage extraction.
embodiment
The present invention is the extracting method of novel microemulsion to gold in electron wastes, completes each step by the embodiment of specific experiment.
First electron wastes is processed to the components and parts above dismounting electron wastes, such as electric capacity, resistance, inductance etc.; Wiring board is first carried out to precrushing and fragmentate, then fragment is further pulverized, by metal and separating organic matters, the electron wastes after pulverizing is dried.
Get the electron wastes after part is pulverized, add in chloroazotic acid, stir after within 2 hours, simultaneously heating jacket keeps the temperature of reaction to be 90 degree, rising temperature of reaction is evaporated to chloroazotic acid dry, take off beaker, after cooling, adding concentration is the hydrochloric acid soln of (1+1), stir after 30 minutes, be again evaporated to dry, after cooling, add deionized water, and filter, the filtrate after filtering is measured to the concentration of Au ion, generally adopt flame atomic absorption spectrometry.
At room temperature, by [C 14mim] Br adds the hexanaphthene of V%=70%, and in the mixed phase of 30% n-hexyl alcohol, ultrasonic agitation is by [C 14mim] Br is dissolved as mixing organic phase, adds HCl until produce water to mixing in organic phase, leaves standstill 12 hours, separates organic phase and hydrochloric acid water, within centrifugal 5 minutes under 2000 r/min conditions, do not have layering to form microemulsion organic phase.
The gold ion working fluid of preparation Au (III) ion and HCl solution, the concentration of Au (III) is 0.5 g/L, by concussion extraction after gold ion working fluid and micro emulsion liquid-phase mixing.
In order to make Au (III) ion have higher percentage extraction, test respectively [C at this 14mim] Br concentration, mix concussion extraction time, water and milk ratio, add HCl until produce this four conditions impact on gold ion percentage extraction of concentration of HCl in water process to mixing in organic phase.
Change [C in microemulsion 14mim] concentration of Br is respectively 2,4, and 5,7,10,20,30,40 g/L, mix gold ion working fluid with microemulsion phase, control water and milk than being 5:1, and mixing the concussion time is 8 min, measures respectively gold ion concentration, calculates percentage extraction E, investigates [C 14mim] impact on golden percentage extraction of the concentration of Br.As shown in Figure 1, percentage extraction is with [C 14mim] Br concentration rising and increase, but ease up when increasing to after 10 g/L to change.This is because tensio-active agent [C 14mim] increase of Br concentration can form more micro emulsion drop, can increase water oil ratio surface-area, is conducive to mass transfer.Therefore,, in the time that gold ion concentration is 0.05 g/L, should select [C as far as possible 14mim] concentration of Br is 8～10 g/L.
Preparation Au(III) ionic concn is 0.5 g/L, the gold ion working fluid solution of HCl concentration 1 mol/L, controls [C in microemulsion 14mim] concentration of Br is 4 g/L, golden working fluid 5 ml mixed to (water and milk is than being 5:1) with 1 ml microemulsion phase, controls to mix the concussion time and be respectively 0.5,1.0,1.5,2,2.5,3,5,8,10 min, measures respectively gold ion concentration, calculates percentage extraction.As shown in Figure 2, it is the highest that percentage extraction has reached in the time of 3min, and after remain unchanged.Illustrate that this microemulsion system reaches extraction equilibrium very rapid, and extraction ability is very stable, this is because ionic liquid is non-volatile, is reaching after extraction equilibrium, continues vibration, and it is substantially constant that percentage extraction still can keep.Reach balance in order to ensure extraction, after experiment in slective extraction starting time be 8 min.
Consisting of of fixing microemulsion: [C 14mim] Br 5 g/L, V%(hexanaphthene)=70%, V%(n-hexyl alcohol)=30%.The fixing concussion time is 8 min, changes gold ion working fluid volume and is respectively 1,2,5,10,15,20,25 with the ratio water and milk of microemulsion phase than R, measures respectively the rear gold ion concentration of extraction, and water and milk ratio is less than at 5 o'clock, [C as shown in Figure 3 14mim] Br remains on more than 98% golden percentage extraction, but in the time that water and milk ratio is greater than 5, percentage extraction declines by a big margin, and therefore, under this gold ion concentration conditions, best water and milk is than selecting 5 to be advisable.
Control [C 14mim] concentration of Br is 10 g/L, and water and milk is than being 5:1, and concussion times 8 min, changes concentration of hydrochloric acid in water and is respectively 1,2,3,4,5 mol/L, preparation Cu 2+, Al 3+, Ni 2+, Fe 3+, Au 3+concentration is the mixing solutions of 0.5 g/L, measures Cu in the rear water of extraction 2+, Al 3+, Ni 2+, Fe 3+, Au 3+ionic concn, calculate respectively percentage extraction.In experiment, the increase of HCl concentration can reduce slightly to golden percentage extraction, to Cu 2+, Al 3+, Ni 2+percentage extraction impact little, but can improve significantly Fe 3+percentage extraction.Therefore,, on concentration of hydrochloric acid is selected, should be advisable with 1～2 mol/L.

Claims (4)

1. the extracting method of novel microemulsion to gold in electron wastes, is characterized in that: adopt following steps:
(1) electronic devices and components in dismounting electron wastes, pulverize oven dry by electron wastes;
(2) pulverize in the electron wastes after drying and add chloroazotic acid, stir and keep after temperature of reaction is 90 degree with heating jacket for 2 hours simultaneously, rising temperature of reaction is evaporated to chloroazotic acid dry, adding concentration is the hydrochloric acid soln of (1+1), stir 30 minutes, again sending to dryly, filter after adding deionized water after cooling, filtrate is Au (III) ion filtrate, measures the concentration of the Au ion of filtrate;
(3) by [C 14mim] Br adds the hexanaphthene of V%=70%, and in the mixed phase of V%=30% n-hexyl alcohol, ultrasonic agitation is by [C 14mim] Br is dissolved as mixing organic phase, adds HCl until produce water to mixing in organic phase, leaves standstill 12 hours, separates organic phase and hydrochloric acid water, within centrifugal 5 minutes under 2000 r/min conditions, do not have layering to form microemulsion organic phase;
(4) the gold ion working fluid of preparation Au (III) ion and HCl solution, the concentration of Au (III) is 0.5 g/L, will after gold ion working fluid and micro emulsion liquid-phase mixing, shake extracting gold ion.
2. method according to claim 1, is characterized in that: [C in described microemulsion 14mim] concentration of Br is 8～10 g/L.
3. method according to claim 1, is characterized in that: described mixes gold ion working fluid with microemulsion phase, controls water and milk than being 5:1, and mixing concussion extraction time is 8 minutes.
4. method according to claim 1, is characterized in that: described adds HCl until produce in water process to mixing in organic phase, and the concentration of hydrochloric acid is 1～2 mol/L.
CN201410058926.6A 2014-02-21 2014-02-21 Method for extracting gold from electronic wastes by using novel microemulsion Pending CN103882231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410058926.6A CN103882231A (en) 2014-02-21 2014-02-21 Method for extracting gold from electronic wastes by using novel microemulsion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410058926.6A CN103882231A (en) 2014-02-21 2014-02-21 Method for extracting gold from electronic wastes by using novel microemulsion

Publications (1)

Publication Number Publication Date
CN103882231A true CN103882231A (en) 2014-06-25

Family

ID=50951348

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410058926.6A Pending CN103882231A (en) 2014-02-21 2014-02-21 Method for extracting gold from electronic wastes by using novel microemulsion

Country Status (1)

Country Link
CN (1) CN103882231A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110106355A (en) * 2019-05-17 2019-08-09 上海交通大学 The method of microemulsion extracting gold based on microreactor
CN111172400A (en) * 2020-01-23 2020-05-19 北京工业大学 Method for quickly digesting all components of waste circuit board by microwaves and extracting noble metal ionic liquid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856507A (en) * 1973-03-12 1974-12-24 Owens Illinois Inc Recovery of gold from solution in aqua regia
CN1392274A (en) * 2002-06-14 2003-01-22 陈玉璞 Liquid film and process for extracting gold from poor gold liquid and waste gold liquid
CN103397186A (en) * 2013-07-12 2013-11-20 湖南省同力电子废弃物回收拆解利用有限公司 Regenerating method and process for recycling rare precious metals from electronic wastes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856507A (en) * 1973-03-12 1974-12-24 Owens Illinois Inc Recovery of gold from solution in aqua regia
CN1392274A (en) * 2002-06-14 2003-01-22 陈玉璞 Liquid film and process for extracting gold from poor gold liquid and waste gold liquid
CN103397186A (en) * 2013-07-12 2013-11-20 湖南省同力电子废弃物回收拆解利用有限公司 Regenerating method and process for recycling rare precious metals from electronic wastes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨金辉等: ""巯基树脂吸附—异戊醇萃取光度法测定金"", 《湘潭大学自然科学学报》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110106355A (en) * 2019-05-17 2019-08-09 上海交通大学 The method of microemulsion extracting gold based on microreactor
CN111172400A (en) * 2020-01-23 2020-05-19 北京工业大学 Method for quickly digesting all components of waste circuit board by microwaves and extracting noble metal ionic liquid
CN111172400B (en) * 2020-01-23 2021-12-31 北京工业大学 Method for quickly digesting all components of waste circuit board by microwaves and extracting noble metal ionic liquid
US11661639B2 (en) 2020-01-23 2023-05-30 Beijing University Of Technology Method for whole component microwave fast digestion and precious metal extraction from ionic liquid of waste circuit board

Similar Documents

Publication Publication Date Title
Shih et al. Chemical leaching, precipitation and solvent extraction for sequential separation of valuable metals in cathode material of spent lithium ion batteries
Calgaro et al. Fast copper extraction from printed circuit boards using supercritical carbon dioxide
Xiu et al. Leaching of Au, Ag, and Pd from waste printed circuit boards of mobile phone by iodide lixiviant after supercritical water pre-treatment
Chen et al. Lead during the leaching process of copper from waste printed circuit boards by five typical ionic liquid acids
Silva et al. Leaching behaviour of a galvanic sludge in sulphuric acid and ammoniacal media
Han et al. Copper extraction from waste printed circuit boards by glycine
Zhao et al. Preparation of magnesium hydroxide from serpentinite by sulfuric acid leaching for CO2 mineral carbonation
Zhou et al. Recovery of gold from waste mobile phone circuit boards and synthesis of nanomaterials using emulsion liquid membrane
Vegliò et al. Iron removal process for high-purity silica sands production by oxalic acid leaching
CN104894383A (en) Leaching method of gold and copper in gold-contained electronic waste
CN102746939A (en) Method for extracting tea saponin and tea seed oil with mixed solvent
Park et al. Separation of zinc and nickel ions in a strong acid through liquid–liquid extraction
CN103962106A (en) Method for removing lead in wastewater by virtue of chitosan/humic acid-modified magnetic adsorbent
Zhang et al. Synthesis of cuprous chloride and simultaneous recovery of Ag and Pd from waste printed circuit boards
Li et al. The direct adsorption of low concentration gallium from fly ash
CN103882231A (en) Method for extracting gold from electronic wastes by using novel microemulsion
CN105026583A (en) Precious metal recovery method using copper halide-containing organic solvent system
Zhang et al. Selective removal of iron from acid leachate of red mud by aliquat 336
Sulaiman et al. Recovery of ionized nanosilver from wash water solution using emulsion liquid membrane process
CN105907964B (en) The separation method of vanadium, scandium, iron in a kind of acid solution
Chen et al. Behaviour of zinc during the process of leaching copper from WPCBs by typical acidic ionic liquids
Chang et al. Optimization of microwave-assisted manganese leaching from electrolyte manganese residue
CN105219979A (en) A kind of Extraction chromatography being separated La, Ce, Pr, Nd mixed rare earth ions
CN102153096A (en) Bauxite iron-removing technology
CN102031378A (en) Method for recovering metal silver from waste plasma display panel (PDP) glass plate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20140625