CN102249351A - Platinum, palladium and rhodium extraction and separation method through sugar separation induced three liquid phase system - Google Patents
Platinum, palladium and rhodium extraction and separation method through sugar separation induced three liquid phase system Download PDFInfo
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Abstract
A platinum, palladium and rhodium extraction and separation method through a sugar separation induced three liquid phase system belongs to the technical field of platinum, palladium and rhodium solvent extraction and separation. A technology comprises steps of: dissolving a certain volume of pure acetonitrile to aqueous solution containing platinum ion, palladium ion and rhodium ion; adding a certain weight of sugar into a mixing solution from the last step; adding a certain volume of a palladium selective organic extractant into the mixing aqueous solution, and fully oscillating and mixing at a certain temperature; centrifuging an obtained mixture to obtain an upper, middle and lower layer liquid phase coexisting system; carrying out back extraction on the upper phase to obtain palladium; removing acetonitrile with a lower boiling in the middle phase through a reduced pressure distillation to recover platinum from a steam residual; recovering rhodium from the lower phase. The invention has advantage of solving difficulties that high-density strong electrolyte salt used in a prior three phase extraction and separation of metal ions is apt to corroding equipment, and a high-molecular polymer used in forming phase has high costs and is had to be regenerated and reused, etc.
Description
Technical field
The invention belongs to solvent extraction and separation platinum, palladium, rhodium technical field, particularly relate to the method that a kind of sugar is analysed inductive three-phase system extracting and separating platinum, palladium, rhodium.
Background technology
Solvent extraction is that platinum, palladium, rhodium separate the effective means of purifying.Compare with substitution method with traditional precipitator method, Solvent Extraction Separation purification platinum, palladium, rhodium have tangible advantage:, cycle simple as technology is short, speed of response is fast, metal direct yield height, to the adaptability of various materials with handiness is strong, energy consumption and tooling cost is low, easy handling and amplification, can realize large-scale continuous production and control etc. automatically.Therefore, Solvent Extraction Separation purification platinum, palladium, rhodium by each main precious-metal refiner of the world adopted (Yu Jianmin. the precious metal extraction chemistry. Beijing: Chemical Industry Press, 2005).For example, the Acton refinery of International nickel Co. Ltd. Inco. Ltd. (INCO) uses di-n-octyl thioether DOS collection palladium earlier, and tributyl phosphate TBP collection platinum extracts rhodium with chemical precipitation method at last from raffinate then.The Mathey-Rusterburg refinery of Britain Royston with tri-n-octyl amine TOA collection platinum, extracts rhodium with ion exchange method then at last with the hydroxyoxime palladium that comes together from raffinate.China Jinchuan Nonferrous Metal Co. then earlier with isoamyl sulfide S201 collection palladium, then with trialkyl tertiary amine N 235 collection platinum, reclaims rhodium with the chemical method precipitation at last from the residual mother liquor that comes together.
Platinum, palladium, the general stable existence of rhodium are in hydrochloric acid or chloride media.Because platinum, palladium, rhodium physico-chemical property are very similar, and valence state is changeable, there is complex shape in species, how to improve its separation selectivity and be always the difficult problem in platinum, palladium, the rhodium lyometallurgy.When traditional organic phase/water two-phase solvent extraction and separation technology is handled the complicated feed liquid of a plurality of metal ions coexistence, general from selecting suitable selective extractant, determine optimum process condition, utilize the difference of each metal ion reactive behavior, with selectivity identification coordination between different extractant molecules, formulate suitable extraction procedure by the difficulty or ease order of its extraction.A plurality of metal target ionic selective extractions are separated, need to extract one by one with substep through the liquid-liquid biphase equilibrium of a plurality of steps.Optionally factor is very complicated but owing to influence extracting and separating in the actual procedure, the characteristic of platinum, palladium, rhodium metal chlorine coordination ion itself and the complicacy of coordination behavior in addition, the selectivity of tradition liquid-liquid two-phase solvent extracting and separating platinum, palladium, rhodium is not high, and the operation of the extraction equilibrium of multistep is because flow process is tediously long, separating step is many, easily causes platinum, palladium, the rhodium spread loss in extraction process.For improving the yield and the product purity of solvent extraction and separation platinum, palladium, rhodium, people have to by rule of thumb feed liquid be carried out various pre-treatment repeatedly to adjust its character, carry out biphase equilibrium then repeatedly to improve its extracting and separating selectivity.The consequence of doing like this is that artificial blindness is big, and the extractive reaction course is restive.Disclosed from the hydrochloric acid leachate that contains platinum, palladium, rhodium the technology of extracting and separating platinum, palladium, rhodium must be before extraction reduce feed acidity earlier, with thioether kind of extractants elder generation selectivity collection palladium, feed acidity must be heightened again afterwards, be beneficial to tributyl phosphate TBP selective extraction separating platinum, from extract back liquid, extract rhodium at last with chemical precipitation method.Trivial operations, the human factor influence is big, restive, and the character that each section inter process is connected feed liquid requires high.
Liquid-liquid-liquid three phase extraction technology is based on micro emulsion phase abstraction technique and a kind of new and effective extraction separating method that grows up (Liu Huizhou etc., micro emulsion phase abstraction technique and application. Beijing: Science Press, 2005).Its principle is to utilize extractor body to be tied to form the difference of phase behavior, obtain the different coexistence macroscopic view liquid phase of three immiscible character and phase structure, utilize the otherness of different quilt collection species on physico-chemical property, realize that the different species that come together have different distribution behaviors in three different liquid phases.Because three phase extraction system separation selectivity height, can be implemented in that the step extraction three-phase to plurality of target composition in the COMPLEX MIXED system separates and purifying simultaneously in the single extraction process.Compare with traditional two-phase extraction, not only simplified original technical process greatly, and can improve the yield and the purity of target compound.Therefore, three phase extraction is as a kind of efficient new separation technology succinct, that have target selection, and is more and more in the research of biological, medicine, chemical field in recent years.Separation purification (Chinese invention patent ZL 00107655.8 " triphase one-step extraction process to purify penicillin ") as biological fermentation system penicillin, extract Potenlini and Liquiritin in the natural product Potenlini extracting solution, processing contains the trade effluent of multiple phenols etc., but disclosed three phase extraction system many be target to separate the polycomponent organic compound.
Comparatively speaking, it is considerably less that three phase extraction is used to handle the research report of multiple metal ion coexistence omplicated solution.Mojski M. etc. has reported by the acetonitrile solution that contains pyridine or sulfonamide derivatives (being called the acetonitrile phase) and the aqueous solution that contains monocarboxylic hexane solution (being called hexane mutually) and sodium-chlor, Repone K or ammonium sulfate and has formed three-phase system, one step extraction three phase separation chromium-copper-iron, or vanadium-copper-iron, or vanadium-nickel-cobalt (Journal of Analytical Chemistry, 1996,51 (4): 359-373).Liu Huizhou etc. have reported three-phase system one step of three phase extraction separation of Zinc, manganese, copper (the process engineering journal .2009 from the old and useless battery leach liquor with di-(2-ethylhexyl)phosphoric acid P204 or trialkyl phosphine TRPO and the solution composition of polyoxyethylene glycol PEG 2000-ammonium sulfate double water-phase, 9 (4): 683-688), one step separating titanium, iron, magnesium from Flos Bombacis Malabarici vanadium titano-magnetite sulphuric leachate (Separation and Purification Technology.2010,76:191-197).All these disclosed three phase extraction systems can be divided into two big classes: the three-phase system that (1) is made up of non-polar organic solvent-polar organic solvent-salt brine solution; (2) by three-phase system that non-polar organic solvent-the polymkeric substance polymer aqueous solution-salt brine solution is formed.They have a common characteristic: promptly polar organic solvent and water originally are a single phase soln that dissolves each other, and the aqueous solution of high molecular weight water soluble polymer also is a single phase soln system, after in this two classes a single phase soln, adding a kind of non-polar organic solvent, only can obtain a macroscopic view and be divided into two two-layer liquid-phase systems.But, when further being divided into the strong electrolyte salt (as oxymuriate, nitrate or the vitriol of basic metal or alkaline-earth metal) that two two-layer liquid-phase systems add high density again to this, control proper reaction conditions (as certain temperature of reaction), utilize the salting-out effect of the strong electrolyte salt that adds, can cause system further to divide the three-phase system of three layers of liquid phases coexistence of formation macroeconomic stability.Different by the collection metal ion along with the formation of three-phase system be separated, finish enrichment respectively between different three liquid phases of three character.Now disclosed technology is in order to obtain the salt that stable three-phase system all need use higher concentration.Tend to cause taking place some unpredictable side reactions in the extraction process in the high salt concentration medium, the final form of extraction product is restive, and how from load reclaim metal and regenerated polymer cost-effectively the polymer phase of metal ion, and higher salt concn is separated out easy blocking pipe etc. for the burn into crystallization of equipment and is all made existing three phase extraction system face difficulty in practical application from now on.
Summary of the invention
The object of the present invention is to provide a kind of sugar to analyse the method for inductive three-phase system extracting and separating platinum, palladium, rhodium, solve existing three phase extraction separating metal ion and need use high density strong electrolyte salt, corrosive equipment uses high molecular polymer to become phase cost height, is difficult to difficulties such as regeneration.
The present invention is based on such phenomenon: use sugar to replace salt, in the single_phase system that dissolves each other of polar organic solvent and water, add sugar, can the induced electrical polarity organic solvent and the separating of water, form two-phase system.For example, when adding a certain amount of sugar in the mixture that dissolves each other of acetonitrile and water, under suitable temperature, the mixture that the script homogeneous dissolves each other can split and be divided into two immiscible liquid phases.At this moment, add a kind of non-polar organic solvent again to this two-phase system, the condition that control is suitable can obtain stable three a liquid phases coexistence system.
The objective of the invention is to realize by following technological step:
(1) the pure acetonitrile of certain volume is dissolved into contains in the platinum, palladium, rhodium ionic aqueous solution;
(2) sugar of adding certain mass in the mixing solutions of step (1);
(3) in the mixing solutions that step (2) obtains, add certain volume palladium ion is extracted and have optionally organic extractant, then fully vibration mixing at a certain temperature;
(4) mixture that step (3) is obtained carries out centrifugal treating, obtains the immiscible three liquid phases coexistence system of upper, middle and lower-ranking;
(5) get the last phase that step (4) obtains after centrifugal, reclaim palladium with the ordinary method back extraction;
(6) get the middle phase that step (4) obtains after centrifugal, remove lower boiling acetonitrile, from steam residual thing, reclaim platinum with distillation under vacuum;
(7) get the following phase that step (4) obtains after centrifugal, reclaim rhodium with ordinary method.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described platinum, palladium, rhodium ionic aqueous solution that contains of step (1) can be the compound of 0.1mol/L to hydrochloric acid, nitric acid or the aqueous sulfuric acid dissolving respective metal of 10mol/L with concentration.The compound of respective metal includes but not limited to its muriate, oxide compound, hydrochloride, nitrate, vitriol or carbonate.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the pure acetonitrile volume of the described adding of step (1) is 0.5: 1～5: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described sugar of step (2) is monose.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: contain the sugar that adds certain mass in the platinum, palladium, rhodium ionic acetonitrile-water mixing solutions described in the step (2), the concentration of sugar in mixing solutions is 40g/L～150g/L.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: step (3) is described, and extraction has optionally organic extractant to palladium ion, include but not limited to isoamyl sulfide S201 or di-n-octyl thioether DOS, it is dissolved in the alkane diluent that contains 6-12 carbon atom.The concentration expressed in percentage by weight of palladium organic extractant in thinner is 10wt%～80wt%.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the extraction to palladium ion of the described adding of step (3) has optionally organic extractant, and its volume is 0.5: 1～5: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described vibration mixture control of step (3) temperature is 0 ℃ to 25 ℃.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described distillation under vacuum of step (6) ties up to and allows the system environmental stress remain on below the normal atmosphere in the still-process, and distillation temperature is 30 ℃ to 60 ℃.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described platinum, palladium, rhodium ionic aqueous solution that contains of step (1) is preferably with the muriate preparation of 1mol/L to the aqueous hydrochloric acid dissolving respective metal of 3mol/L.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the pure acetonitrile volume of the described adding of step (1) is preferably 1: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution～and 3: 1.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described sugar of step (2) is preferably any monose of glucose, maltose, sucrose, semi-lactosi or fructose.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: contain the sugar that adds certain mass in the platinum, palladium, rhodium ionic acetonitrile-water mixing solutions described in the step (2), the concentration of sugar in mixing solutions is preferably 80g/L～100g/L.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: step (3) is described, and extraction has optionally organic extractant to palladium ion, preferred isoamyl sulfide S201 is dissolved in it in heptane or the dodecane.The concentration expressed in percentage by weight of S201 in heptane or dodecane is preferably 30wt%～50wt%.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described adding of step (3) palladium ion extraction is had optionally organic extractant, its volume is preferably 0.5: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution～2: 1.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described vibration mixture control of step (3) temperature is preferably 10 ℃ to 20 ℃.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the environmental stress of the described distillation under vacuum of step (6) is 0MPa～0.05MPa, and distillation temperature is 40 ℃ to 50 ℃.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: step (5) is described step (4) is obtained after centrifugal on reclaim palladium with the ordinary method back extraction mutually, include but not limited to ammoniacal liquor reverse-extraction method, electroreduction method.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: the described method that reclaims platinum from steam residual thing of step (6) is a conventional method, includes but not limited to reagent reduction method, electrodip process etc.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that: described following that step (4) is obtained after centrifugal of step (7) reclaims rhodium with ordinary method, includes but not limited to reagent reduction method, electrodip process etc.
A kind of sugar of the present invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, and the concentration of platinum, palladium, rhodium metal ion in initial aqueous solution of being come together does not limit.
The invention has the advantages that, use sugar to replace salt, a series of problems that the strong electrolyte salt that can avoid the common three-phase system of saltouing to require to add high density brings.In addition, contain that high acid concentration can not cause the degraded of sugar to destroy in the aqueous solution of platinum, palladium, rhodium metal ion.
A kind of sugar provided by the invention is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, can realize the enrichment and separating respectively in three different in kinds, not miscible coexistence liquid phase (upper, middle and lower three-phase) respectively of platinum, palladium, rhodium.Compare traditional liquid-liquid two-phase extraction method, the three phase extraction system can be finished palladium-selective simultaneously and be enriched in the nonpolar palladium-selective organic extractant in upper strata in the single extraction process, platinum is enriched in the acetonitrile polar organic solvent that sugar separates out, and rhodium is strong because of hydration, stay lower floor's residual aqueous phase that comes together and be not extracted, separate with the platinum palladium.Therefore, the three phase extraction method can be implemented in while three phase separation platinum, palladium, rhodium in the step extraction process, and its separation selectivity height can effectively be simplified existing lengthy and tedious platinum, palladium, rhodium liquid-liquid two-phase extraction separation processes flow process.
Description of drawings
Fig. 1 analyses the method flow diagram of inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums for a kind of sugar of the present invention.
Embodiment
The present invention is described in detail by the following examples, but all embodiment do not constitute any restriction to the present invention.
Embodiment 1
With 5mL concentration is aqueous hydrochloric acid dissolving platinum, palladium, the rhodium muriate of 1mol/L, is mixed with the metal mixed solution that contains platinum, palladium, rhodium ion, and concentration of metal ions is 100mg/L.Add the pure acetonitrile of 10mL, fully mixing.In this mixed solution, add 1.2g glucose then again.Add the organic mixing solutions of 5mL S201-dodecane then, the concentration expressed in percentage by weight of S201 in dodecane is 30wt%.15 ℃ of temperature controls, fully vibration mixes.Then mixture is carried out centrifugal treating, obtain the three liquid phases coexistence system of the immiscible clarification phase-splitting of upper, middle and lower-ranking.Get the upper, middle and lower three-phase respectively and measure palladium, platinum, rhodium concentration, calculate palladium, platinum, rhodium and account for mass percent in the initial water mixed phase metal solution in the triphasic quality in upper, middle and lower respectively, palladium massfraction 98.3%, the platinum massfraction is 85.36%, rhodium does not extract substantially, and massfraction is 98.8%.Get the last phase that obtains after centrifugal, reclaim palladium with the ammoniacal liquor back extraction; Get the middle phase that obtains after centrifugal, carry out distillation under vacuum with Rotary Evaporators and remove lower boiling acetonitrile, the pressure of distillation procedure is 0.05MPa, and distillation temperature is 45 ℃, and the platinum ion that steams in the raffinate reclaims with chloride precipitation; Get the following phase that obtains after centrifugal, reclaim rhodium with chloride precipitation.
Embodiment 2
With 10mL concentration is aqueous hydrochloric acid dissolving platinum, palladium, the rhodium muriate of 3mol/L, is mixed with the metal mixed solution that contains platinum, palladium, rhodium ion, and concentration of metal ions is 500mg/L.Add the pure acetonitrile of 10mL, fully mixing.In this mixed solution, add 2.0g sucrose then again.Add the organic mixing solutions of 10mL S201-dodecane then, the concentration expressed in percentage by weight of S201 in dodecane is 50wt%.10 ℃ of temperature controls, fully vibration mixes.Then mixture is carried out centrifugal treating, obtain the three liquid phases coexistence system of the immiscible clarification phase-splitting of upper, middle and lower-ranking.Get the upper, middle and lower three-phase respectively and measure palladium, platinum, rhodium concentration, calculate palladium, platinum, rhodium and account for mass percent in the initial water mixed phase metal solution in the triphasic quality in upper, middle and lower respectively, palladium massfraction 99.0%, the platinum massfraction is 90.5%, rhodium does not extract substantially, and massfraction is 99.0%.Get the last phase that obtains after centrifugal, reclaim palladium with the ammoniacal liquor back extraction; Get the middle phase that obtains after centrifugal, carry out distillation under vacuum with Rotary Evaporators and remove lower boiling acetonitrile, the pressure of distillation procedure is 0.02MPa, and distillation temperature is 45 ℃, and the platinum ion that steams in the raffinate reclaims with chloride precipitation; Get the following phase that obtains after centrifugal, reclaim rhodium with chloride precipitation.
Embodiment 3
With 10mL concentration is aqueous hydrochloric acid dissolving platinum, palladium, the rhodium muriate of 1mol/L, is mixed with the metal mixed solution that contains platinum, palladium, rhodium ion, and concentration of metal ions is 200mg/L.Add the pure acetonitrile of 30mL, fully mixing.In this mixed solution, add the 2.0g semi-lactosi then again.Add the organic mixing solutions of 10mL S201-dodecane then, the concentration expressed in percentage by weight of S201 in dodecane is 50wt%.18 ℃ of temperature controls, fully vibration mixes.Then mixture is carried out centrifugal treating, obtain the three liquid phases coexistence system of the immiscible clarification phase-splitting of upper, middle and lower-ranking.Get the upper, middle and lower three-phase respectively and measure palladium, platinum, rhodium concentration, calculate palladium, platinum, rhodium and account for mass percent in the initial water mixed phase metal solution in the triphasic quality in upper, middle and lower respectively, palladium massfraction 98.5%, the platinum massfraction is 93.0%, rhodium does not extract substantially, and massfraction is 98.0%.Get the last phase that obtains after centrifugal, reclaim palladium with the ammoniacal liquor back extraction; Get the middle phase that obtains after centrifugal, carry out distillation under vacuum with Rotary Evaporators and remove lower boiling acetonitrile, the pressure of distillation procedure is 0.02MPa, and distillation temperature is 45 ℃, and the platinum ion that steams in the raffinate reclaims with chloride precipitation; Get the following phase that obtains after centrifugal, reclaim rhodium with chloride precipitation.
Claims (13)
1. a sugar is analysed the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums, it is characterized in that the technical parameter of processing step and control is:
(1) the pure acetonitrile of certain volume is dissolved into contains in the platinum, palladium, rhodium ionic aqueous solution, form mixing solutions, the pure acetonitrile volume of described adding is 0.5: 1～5: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution;
(2) sugar of adding certain mass in the mixing solutions of step (1), the concentration of sugar in mixing solutions is 40g/L～150g/L;
(3) in the mixed aqueous solution that step (2) obtains, add certain volume palladium ion is extracted and have optionally organic extractant, fully vibration mixing at a certain temperature then, the organic extractant volume is 0.5: 1～5: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution;
(4) mixture that step (3) is obtained carries out centrifugal treating, obtains the immiscible three liquid phases coexistence system of upper, middle and lower-ranking;
(5) get the last phase that step (4) obtains after centrifugal, reclaim palladium with the ordinary method back extraction;
(6) get the middle phase that step (4) obtains after centrifugal, remove lower boiling acetonitrile with distillation under vacuum, reclaim platinum from steam residual thing, described distillation under vacuum ties up to and allows the system environmental stress remain on below the normal atmosphere in the still-process, and distillation temperature is 30 ℃ to 60 ℃;
(7) get the following phase that step (4) obtains after centrifugal, reclaim rhodium with ordinary method.
2. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described platinum, palladium, rhodium ionic aqueous solution that contains of step (1) can be the compound of 0.1mol/L to hydrochloric acid, nitric acid or the aqueous sulfuric acid dissolving respective metal of 10mol/L with concentration; The compound of respective metal includes but not limited to its muriate, oxide compound, hydrochloride, nitrate, vitriol or carbonate.
3. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described sugar of step (2) is monose.
4. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: step (3) is described, and extraction has optionally organic extractant to palladium ion, include but not limited to isoamyl sulfide S201 or di-n-octyl thioether DOS, it is dissolved in the alkane diluent that contains 6-12 carbon atom; The concentration expressed in percentage by weight of palladium organic extractant in thinner is 10wt%～80wt%.
5. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described vibration mixture control of step (3) temperature is 0 ℃ to 25 ℃.
6. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described platinum, palladium, rhodium ionic aqueous solution that contains of step (1) is preferably with the muriate preparation of 1mol/L to the aqueous hydrochloric acid dissolving respective metal of 3mol/L.
7. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the pure acetonitrile volume of the described adding of step (1) is 1: 1～3: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution.
8. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described sugar of step (2) is any monose of glucose, maltose, sucrose, semi-lactosi or fructose.
9. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: contain the sugar that adds certain mass in the platinum, palladium, rhodium ionic acetonitrile-water mixing solutions described in the step (2), the concentration of sugar in mixing solutions is 80g/L～100g/L.
10. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: step (3) is described to have optionally to palladium ion extraction that organic extractant selects isoamyl sulfide S201, it is dissolved in heptane or the dodecane, and the concentration expressed in percentage by weight of S201 in heptane or dodecane is 30wt%～50wt%.
11. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described adding of step (3) palladium ion extraction is had optionally organic extractant, its volume is preferably 0.5: 1 with the volume ratio that contains the platinum, palladium, rhodium deionized water solution～2: 1.
12. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the described vibration mixture control of step (3) temperature is 10 ℃ to 20 ℃.
13. analyse the method for inductive three liquid-phase system extracting and separating platinum, palladium, rhodiums according to the described a kind of sugar of claim 1, it is characterized in that: the environmental stress of the described distillation under vacuum of step (6) is 0MPa-0.05MPa, and distillation temperature is 40 ℃-50 ℃.
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| CN104357674A (en) * | 2014-11-14 | 2015-02-18 | 重庆材料研究院有限公司 | Extraction separation method of rhodium in rhodium-containing extraction raffinate |
| CN109913666A (en) * | 2019-03-12 | 2019-06-21 | 滨州学院 | The sugar analysis three-phase system and method for a kind of extraction and separation Fe (III), Cr (III) and Ni (II) |
| RU2736477C1 (en) * | 2019-10-17 | 2020-11-17 | Общество с ограниченной ответственностью "Центр изучения и исследования нефти" | Method of extracting noble metals from multicomponent solutions |
| RU2764778C1 (en) * | 2021-02-24 | 2022-01-21 | Игорь Владимирович Федосеев | Method for selective isolation of enriched platinum metal concentrates from multicomponent solutions |
| CN114405060A (en) * | 2022-02-09 | 2022-04-29 | 中国科学院过程工程研究所 | Method for synchronously separating lithium, boron and magnesium in salt lake brine through three-liquid-phase extraction |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104357674A (en) * | 2014-11-14 | 2015-02-18 | 重庆材料研究院有限公司 | Extraction separation method of rhodium in rhodium-containing extraction raffinate |
| CN109913666A (en) * | 2019-03-12 | 2019-06-21 | 滨州学院 | The sugar analysis three-phase system and method for a kind of extraction and separation Fe (III), Cr (III) and Ni (II) |
| RU2736477C1 (en) * | 2019-10-17 | 2020-11-17 | Общество с ограниченной ответственностью "Центр изучения и исследования нефти" | Method of extracting noble metals from multicomponent solutions |
| RU2764778C1 (en) * | 2021-02-24 | 2022-01-21 | Игорь Владимирович Федосеев | Method for selective isolation of enriched platinum metal concentrates from multicomponent solutions |
| CN114405060A (en) * | 2022-02-09 | 2022-04-29 | 中国科学院过程工程研究所 | Method for synchronously separating lithium, boron and magnesium in salt lake brine through three-liquid-phase extraction |
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