CN1206048A - Cyclic carbamate noble metal extractant - Google Patents

Cyclic carbamate noble metal extractant Download PDF

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Publication number
CN1206048A
CN1206048A CN97115115A CN97115115A CN1206048A CN 1206048 A CN1206048 A CN 1206048A CN 97115115 A CN97115115 A CN 97115115A CN 97115115 A CN97115115 A CN 97115115A CN 1206048 A CN1206048 A CN 1206048A
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Prior art keywords
extraction
extraction agent
agent according
cyclic carbamates
extractant
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CN97115115A
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CN1087786C (en
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栾和林
武荣成
姚文
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Beijing General Research Institute of Mining and Metallurgy
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Beijing General Research Institute of Mining and Metallurgy
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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Abstract

The cyclic carbamate extractant is a novel noble metal extractant, which can integrally and once completely separate various noble metals from base metal ions under the condition of no diluent and higher metal ion concentration, and can achieve extraction rates of 100%, 100% and 98.5% for one-time extraction of Au, Pt and Pd. And is easy to back extract with reducing agent and regenerate extractant.

Description

A kind of cyclic carbamates noble metal extractant
Cyclic carbamate among the present invention is the new noble metal extractant of a class, they can extract under the situation without thinner, and in high acidity, realize Au, Pt, Pd under the situation of high ion concentration ... Deng precious metal ion with multiple base-metal ion (Cu, Ni, Co, Mg ...) between, the extracting and separating of globality.
In precious metal refining process in the past, realize precious metal (Au, Pt, Pd ...) same base metal (Cu, Ni, Co, Mg ...) separation often want chemical method to add multiple extraction process, in the extraction process often a kind of extraction agent also an extracting and separating go out a kind of, the interference of base metal exists always, treatment capacity is big, the numerous rope of treatment process, technology cost costliness.New extraction agent if can be arranged, can be with Au, Pt, Pd ... with base metal earlier separately, extract also enrichment Au, Pt, Pd earlier ..., concentrate again Au, Pt, Pd are separated, then treatment capacity diminishes, and treatment process is simplified, and the impurity content of precious metal also descends significantly.
In addition, in precious metal hydrometallurgy, it is very active to seek the research work that substitutes the prussiate leaching, leaches as muriate, and thiocarbamide leaches ...New leaching system also must have the novel extraction agent that is complementary with it to occur.The needs of these new leaching systems of cyclic carbamate positive adaptation.
Purpose of the present invention: invent a kind of new noble metal extractant.They are cyclic carbamates, they can be with precious metal (Au, Pt, Pd in strong acid media ...) with numerous base metals (Cu, Ni, Co, Mg ...) one or several times simple extraction sepn process in realize that precious metal separates with the globality between base metal, thereby simplify hydrometallurgy (precious metal) technology; And be new leaching system (leaching as muriate), supporting new extractant is provided.
Cyclic carbamate among the present invention has fine hydrophobicity and flowability, and the function of thinner is arranged itself, can be without thinner, they can be at PH=1, and muriate leaches in the feed liquid, under the high ion concentration condition, comparing 1: 1, during separating, realizes the single extraction that extracted three minutes from Cu 2+, Co 2+, Ni 2+, Mg 2+With 100%, 100%, 98.5% percentage extraction, extract Au, Pt, Pd in many base-metal ion, realize the overall separation between expensive, base metal.
Cyclic carbamate among the present invention share with cyclic carbonate, and selectivity can further improve selectivity.
When the feed liquid ionic concn strengthened, cyclic carbamates and they showed that with all not considerable changes of its extraction ability of suitable assembly of other noble metal extractant this kind of extractants has bigger saturated capacity.
Representative of the present invention: Representative with reference to patent US 5348712
Embodiment 1
The extraction ability contrast is implemented
The chloroazotic acid that the minimal amounts of dissolved gold is arranged in the feed liquid, the muriate of hydrochloric acid and Pt, Pd leaches feed liquid, PH=1, and each concentration of metal ions is 800ppm in the feed liquid, compare 1: 1, do not add thinner, on vibrator the vibration 3 minutes, leave standstill 1 minute after, phase-splitting, tell water after the phase-splitting, measure various ionic concns in the raffinate with the ICP analysis of emission spectrography, the difference of concentration is the extraction quantity in the organic phase before this value and the extraction.
Extraction results:
Percent extraction (%) Au 3+Pt 4+Pd 2+Cu 2+Ni 2+Co 2+Mg 2+
1# 100 100 98.5 10 4 0.1 0.8
3# 99 0.1 2 0.1 0.1 0.1 0.8
1# is to Au 3+, Pt 4+, Pd 2+Several precious metals all have fine extraction power, and the extraction power to Au also is far longer than the 3# representative that contrasts in the patent separately.Embodiment 2 usefulness 1# extraction agents with
Figure 9711511500043
Set up jointly and join.
Other operation, test with embodiment 1 result of implementation:
Au 3+ Pt 4+ Pd 2+ Cu 2+ Ni 2+ Co 2+ Mg 2+
Percent extraction (%) 100 100 99 0000
After the assembly on cyclic carbamate basis, selectivity further improves, and is more suitable in the sharp separation of the globality between expensive, base metal.
Embodiment 3
Au 3+Feed concentration change to 3000ppm from 200ppm always, other is operated with embodiment 1.
Experimental result: with Au in the feed liquid 3+Concentration continue to increase, 3# is to Au 3+Percentage extraction drop to 96.8% from 99%.
And 1#; 2#+1#; The extraction agent of 80%1#+20% mibk (or dialkyl sulfide, etc.) is to Au 3+Percentage extraction remain on 100% always.
Embodiment 4
Add FeSO in the extraction liquid of embodiment 1 4Aqueous solution vibration 1 minute, phase-splitting, the water place golden yellow metal level of appearance on glass, organic phase partly is white by xanthochromia, extraction agent is reproduced.

Claims (8)

  1. A cyclic carbamates extraction agent and between them or the assembly between they and other noble metal extractant as noble metal extractant, they can have or the diluent free situation under from acidic aqueous solution multiple precious metal ion of extracting and separating or complex compound, extraction liquid can make extractant regeneration easily with reductive agent or electrolytic process back extraction precious metal;
  2. 2. cyclic carbamates extraction agent according to claim 1 is characterized in that they are five-membered rings, and precursor structure is as follows:
    Figure 9711511500021
    R 1Be 1 to 20 arbitrary alkyl or H in the carbon;
    R 2, (R 3) be 1 to 20 arbitrary alkyl or H in the carbon;
  3. 3. cyclic carbamates extraction agent according to claim 1, the composition that it is characterized in that extraction agent can be one or more in them, also can be they and other noble metal extractant as mibk, dialkyl sulfide or sulfoxide, or the assembly of cyclic carbonates etc.;
  4. 4. cyclic carbamates extraction agent according to claim 1, it is characterized in that they can be in acidic medium (example hydrochloric acid, chloroazotic acid, nitric acid, sulfuric acid, muriate leach liquor ... and extract precious metal ion in the various nitration mixture between them;
  5. 5. cyclic carbamates extraction agent according to claim 1, it is characterized in that their in can the extracting and separating precious metal one or more, especially they can carry out Au, Pt, Pd is equal to base metal (Cu, Co, Ni, Mg ...) between disposable, whole extracting and separating;
  6. 6. cyclic carbamates extraction agent according to claim 1, it is characterized in that they can have or the situation of diluent free under carry out extraction process;
  7. 7. cyclic carbamates extraction agent according to claim 1, the consumption that it is characterized in that them be generally by collection liquid long-pending 5%~1000%, wherein optimum range is 50~200%;
  8. 8. cyclic carbamates extraction agent according to claim 1 is characterized in that extraction liquid can use reductive agent (Fe, Fe 2+, Zn), formaldehyde ... or electrolytic process back extraction, and the extraction agent of regenerating.
CN97115115A 1997-07-23 1997-07-23 Cyclic carbamate noble metal extractant Expired - Fee Related CN1087786C (en)

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CN97115115A CN1087786C (en) 1997-07-23 1997-07-23 Cyclic carbamate noble metal extractant

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CN1206048A true CN1206048A (en) 1999-01-27
CN1087786C CN1087786C (en) 2002-07-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103509947A (en) * 2012-06-18 2014-01-15 独立行政法人日本原子力研究开发机构 Solvent extraction separation method for extracting and separating precious metal from hydrochloric acid solution
CN106187932A (en) * 2016-07-27 2016-12-07 红河学院 2 (2 methoxy ethyl sulfinyl) benzoxazoles method of extracting and separating palladium from many metallic ion mixed liquors
CN106316980A (en) * 2016-07-27 2017-01-11 红河学院 2-(sulfo-2-methoxyethyl)benzothiazole and its preparation method and use

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525199A (en) * 1981-05-04 1985-06-25 Nelson Research & Development Co. Method of improved pest control
FR2553782B3 (en) * 1983-10-19 1985-12-13 Vulnax International Ltd METHOD FOR STABILIZING RUBBER ELASTOMERS AGAINST OZONE AND STABILIZED ELASTOMERIC COMPOSITIONS
CH668530A5 (en) * 1986-10-22 1989-01-13 Ciba Geigy Ag SYNERGISTIC AGENT AND METHOD FOR SELECTIVELY WEED CONTROL IN RICE.
US5156666A (en) * 1989-12-11 1992-10-20 Isp Investments Inc. Delivery system for agricultural chemicals

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103509947A (en) * 2012-06-18 2014-01-15 独立行政法人日本原子力研究开发机构 Solvent extraction separation method for extracting and separating precious metal from hydrochloric acid solution
CN106187932A (en) * 2016-07-27 2016-12-07 红河学院 2 (2 methoxy ethyl sulfinyl) benzoxazoles method of extracting and separating palladium from many metallic ion mixed liquors
CN106316980A (en) * 2016-07-27 2017-01-11 红河学院 2-(sulfo-2-methoxyethyl)benzothiazole and its preparation method and use
CN106187932B (en) * 2016-07-27 2020-07-14 红河学院 Method for extracting and separating palladium from multi-metal ion mixed solution by using 2- (2-methoxyethylsulfinyl) benzoxazole
CN106316980B (en) * 2016-07-27 2021-02-05 红河学院 2- (sulfo-2-methoxyethyl) benzothiazole and preparation method and application thereof

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