Abstract: For processing of noble metal-containing, moist recycling materials with an unknown noble metal content (hereinafter called “batch”), a moisture-binding agent is added for homogenisation and the batch is mixed with comminution of optionally pre-sent agglomerates to form a free-flowing and homogenous powder. Optionally, the following takes place subsequently for analysis: A at least one representative, volume-reduced sample is taken first of all, B the sample is dried, C the sample is optionally divided further and D the sample is analyzed and the noble metal content of the batch is calculated on the basis of the data a previously known or pre-calculated quantity of the moisture-binding agent being added before sampling (step A).

Abstract: The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.

Abstract: The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution (“HGPLS”) and a low grade pregnant leach solution (“LGPLS”) to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.

Abstract: A method of recovering minerals from hydrocarbonaceous materials can include forming a constructed permeability control infrastructure. This constructed infrastructure defines a substantially encapsulated volume. A comminuted hydrocarbonaceous material can be introduced into the control infrastructure to form a permeable body of hydrocarbonaceous material. The permeable body can be contacted with an agent sufficient to remove minerals therefrom. The agent is typically a solution containing a solvent, leachant, chelating agent and the like via which minerals can be removed having value, toxic minerals, radioactive minerals and the like.

Abstract: In various aspects, the invention provides processes that use relatively low levels of acid to leach lean nickel ores, including processes that provide relatively high levels of extraction of nickel and cobalt from nickel laterite ores, in conjunction with relatively low levels of iron extraction.

Abstract: A method is provided for separating the impurities zinc, iron, calcium, copper and/or manganese from an aqueous solution that contains cobalt and nickel. The solution is brought into a mixing contact with an extraction solution, which is pre-loaded with cobalt and nickel ions, whereby the cobalt and nickel in the extraction solution are replaced with the impurity metals, and the aqueous solution is cleaned from impurities after this phase. This purified aqueous solution, raffinate, can be used to pre-charge the extraction solution so that a minor part of the raffinate is contacted with a pre-neutralized extraction solution, whereby the cobalt and nickel replace the alkali metal, alkali earth metal or ammonium ion that is used in the pre-neutralization.

Abstract: The oxine ligands 5-chloro-8-hydroxyquiniline and 5-sulfoxyl-8-hydroxyquinoline are covalently bound, using, for example, the Mannich reaction, to a silica gel polyamine composite made from a silanized amorphous silica xerogel and polyallylamine. The resulting modified composites, termed CB-1 (X?Cl) and SB-1 (X?SO3H), respectively, show a clear selectivity for trivalent over divalent ions and selectivity for gallium over aluminum. The compounds of the invention can be applied for the sequestration of metals, such as heavy metals, from contaminated mine tailing leachates.

Abstract: Solvent extraction compositions having an orthohydroxyaryloxime extractant, an anti-degradation agent, and a water-immiscible organic solvent, processes for extracting a metal from an aqueous acidic solution using same, and methods of reducing degradation of such compositions are provided herein.

Abstract: A method of sequestering carbon dioxide emissions during recovery of hydrocarbons from hydrocarbonaceous materials can include forming a constructed permeability control infrastructure. This constructed infrastructure defines a substantially encapsulated volume. A comminuted hydrocarbonaceous material can be introduced into the control infrastructure to form a permeable body of hydrocarbonaceous material. The permeable body can be heated sufficient to remove hydrocarbons therefrom. During heating, the hydrocarbonaceous material is substantially stationary as the constructed infrastructure is a fixed structure. Additionally, during heating, any carbon dioxide that is produced can be sequestered. Removed hydrocarbons can be collected for further processing, use in the process, and/or use as recovered.

Abstract: A solid composition comprises: —MnO2; and—a compound represented by the general formula (I) wherein: R is a polymer; each Y is independently a hydrogen or a negative charge; Z is either hydrogen or is not present; each n is independently 1, 2, 3, 4, 5 or 6; wherein the MnO2 is bound to the compound of formula (I) so as to coat the surface thereof. Such a composition may be used for the separation of polyvalent metal species, such as Mo, from one or more accompanying impurities.

Abstract: The addition of a compatible metal salt crystal to the organic solution entering the mixer(s) in the solvent extraction stage(s) and/or the stripping stage(s), or to the emulsion mixture of the organic solution and the aqueous solution in the mixer(s), or to the mixture of the organic solution and the aqueous solution in a settler tank(s) following the mixer(s) in the solvent extraction and/or stripping stage(s) following the leaching of metal values from the ore containing that/those value(s) into an aqueous solution, and prior to the further refining of those values in processes, such as electrowinning, during mining operations for those metal values in order to improve the phase separation of the organic phase and the aqueous phase, and to promote the removal of contaminants from the organic phase.

Abstract: A solvent extraction composition comprising one or more orthohydroxyarylaldoximes and/or one or more orthohydroxyarylketoximes, and one or more selectivity modifiers consisting of phosphinic and/or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers is provided.

Abstract: Provided are methods using ketoximes and/or aldoximes, including 3-methyl-5-alkylsalicylaldoxime and/or 3-methyl-5-alkyl-2-hydroxyacetophenone oxime, in reagent compositions for metal extraction/isolation. One such method is of extracting a metal from a nitrate-containing aqueous solution. Another such method is of extracting a metal from an aqueous ammoniacal solution. A third method is of multi-metal extraction based on a predetermined pH.

Abstract: Reagent compositions, methods for their manufacture and methods of their use are described. In particular, provided are reagent compositions comprising an aldoxime and ketoxime with an alkyl substituent. Also provided are methods of metal recovery using these reagent compositions.

Abstract: Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect relates to a method of separating iron/copper using a specific ketoxime. Aldoximes may also be added to the reagent compositions used in these methods.

Abstract: Provided are methods using ketoximes and/or aldoximes, including 3-methyl-5-alkylsalicylaldoxime and/or 3-methyl-5-alkyl-2-hydroxyacetophenone oxime, in reagent compositions for metal extraction/isolation. One such method is of extracting a metal from an aqueous ammoniacal solution. Metals that can be extracted include nickel, zinc and copper.

Abstract: The present invention refers to a direct purification process of a nickel laterite leaching effluent including adjusting a pH of a leaching solution, employing an ion exchange resin to adsorb nickel and copper selectively over ferric or ferrous iron, and recovering nickel.

Abstract: A method is provided for extracting nickel values from nickel-containing ores. The method comprises (a) treating a nickel-containing ore with an acid, thereby producing an acid treated ore; (b) baking the acid treated ore, thereby producing a baked ore; (c) leaching nickel from the baked ore to form a leachate; and (d) extracting nickel values from the leachate through the use of an ion exchange resin.

Abstract: There are provided processes for extracting aluminum ions from aluminous ores. Such processes can be used with various types of aluminous ores such as aluminous ores comprising various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof.

Abstract: A process for the removal of corrosion metal contaminants from a carbonylation catalyst solution comprising an iridium and/or rhodium carbonylation catalyst, an alkali and/or alkaline earth metal and corrosion metal contaminants in which the catalyst solution is contacted with a cation exchange resin having its active sites partially loaded with a sufficient amount of alkali and/or alkaline earth metal to maintain the concentration of said alkali and/or alkaline earth metal in the catalyst solution and recovering a catalyst solution of reduced corrosion metal contaminant content.

Abstract: A process for producing a purified nickel hydroxide precipitate from a nickel-containing leach solution with impurities including one or more of the following: manganese, copper, zinc, iron and/or cobalt, so that the purified nickel hydroxide is suitable for pelletization with iron-containing ores and/or stainless steel production, includes treating the leach solution with a base to form a slurry of mixed hydroxide precipitate and low-nickel barren solution, thickening the slurry to form filter cake, washing the filter cake and contacting it with acid to dissolve nickel and other metals to produce a concentrated nickel-containing solution, subjecting the concentrated nickel-containing solution to solvent extraction with an organic acid extractant to remove metals other than nickel from the nickel-containing solution and form a solvent extraction raffinate of purified nickel solution and treating the solvent extraction raffinate with a base to precipitate the purified nickel hydroxide precipitate.

Abstract: Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution comprising a metal, a leaching agent and water; (b) subjecting the first aqueous leach pulp to a first solid-liquid separation to provide a first clarified aqueous leach solution and a second aqueous leach pulp, wherein the second aqueous leach pulp comprises the leached solids at a % solids level greater than the first pulp; (c) subjecting the first clarified aqueous leach solution to a first solvent extraction prior to any significant dilution, whereby a first aqueous raffinate is obtained; (d) subjecting the second aqueous leach pulp to a second solid-liquid separation with dilution via an aqueous stream to obtain a second clarified aqueous leach solution; and (e) subjecting the second clarified aqueous leach solution to a second solvent extraction whereby a second is aqueous raffinate is obtained.

Abstract: The application of aqueous solution of magnesium bicarbonate and/or calcium bicarbonate in the process of extraction separation and purification of metals is disclosed, wherein the aqueous solution of magnesium bicarbonate and/or calcium bicarbonate is used as an acidity balancing agent, in order to adjust the balancing pH value of the extraction separation process which uses an acidic organic extractant, improve the extraction capacity of organic phase, and increase the concentration of metal ions in the loaded organic phase.

Abstract: A method for scrubbing an amine extractant (A) containing an amine added with hydrochloric acid, and an amine binding a metal chloro complex ion, in a scrubbing stage constituting a solvent extraction step, characterized by substituting a chloride ion of the amine, which is added with hydrochloric acid, with sulfuric acid ion, by bringing the amine extractant (A) into contact with a sulfuric acid solution with a concentration of 3 to 10 N, and subsequently, by eliminating a metal by bringing the substituted amine extractant (B) into contact with water.

Abstract: A method for extracting cobalt from copper raffinate. First, a supply of raffinate containing at least cobalt, copper, ferric iron and nickel, is provided. The raffinate is pretreated by one or all of raising the raffinate pH level; removing solids; and, reducing ferric iron to ferrous iron. Substantially all copper is removed using first ion exchange resin selective for copper. A second ion exchange resin selective for both cobalt and nickel is used to remove the cobalt and nickel. Cobalt and nickel are separately eluted from the second ion exchange resin.

Abstract: Method of ion exchange cobalt recovery. Raffinate including cobalt, zinc, copper, nickel and ferric iron is produced. In the raffinate, the pH is raised, the solids are removed and ferric iron is reduced. A copper recovery ion exchange unit is loaded with ion exchange resin selective for copper. Raffinate is fed into the copper recovery ion exchange unit which is regenerated to recover substantially all copper. A cobalt/nickel/zinc recovery ion exchange unit is loaded with another ion exchange resin selective for cobalt. Raffinate is fed into the cobalt/nickel/zinc recovery ion exchange unit, the ion exchange resin holding cobalt, zinc and nickel, and then displaced. Cobalt/zinc eluent is fed into the cobalt/zinc/nickel recovery ion exchange unit to elute the cobalt and zinc in a cobalt/zinc solution, and then displaced. Nickel eluent is fed into the cobalt/zinc/nickel recovery ion exchange unit to elute the nickel.

Abstract: A heap leach process for the recovery of nickel and cobalt from a lateritic ore, said process including the steps of leaching and/or agglomerating the ore with a lixiviant that includes ferrous ions, wherein the lixiviant is able to liberate cobalt from the cobalt containing minerals within the ore in preference to nickel, to produce a cobalt rich pregnant leach solution relatively free of nickel.

Abstract: A process for the recovery of nickel and cobalt from a nickeliferous oxidic ore by heap leaching and/or atmospheric agitation leaching, the process including the steps of: mixing a sulfur containing reductant selected from reductants that do not include copper into a nickeliferous oxidic ore; leaching the reductant/ore mixture with an acidic leach reagent to produce a pregnant leach solution including nickel, cobalt, iron substantially in a ferrous form and other acid soluble impurities; and recovering the nickel and cobalt from the pregnant leach solution.

Abstract: The method for scrubbing an amine type extractant after stripping to be able to regenerate the same so that the amine type extractant can be repeatedly reused as it is in the extraction stage in the solvent extraction process, when an amine type extractant is regenerated by scrubbing an amine type extractant (A) containing an iron and a zinc chloro complex ion obtained by back extracting a cobalt with a hydrochloric acid aqueous solution from the amine type extractant after extracting a cobalt. The method is characterized by comprising the procedures of the following (1) to (3). (1) an amine type extractant (B) is obtained by adding an aqueous solution containing a sulfite ion to an amine type extractant (A) and stirring the mixture and reducing a ferric (III) chloro complex ion to divalent. (2) an amine type extractant (C) is obtained by adding an aqueous solution containing an oxidizing agent to the amine type extractant (B) and stirring the mixture and oxidizing a sulfite ion to sulfate ion.

Abstract: A method for recovering nickel from an sulfuric acid aqueous solution, for recovering nickel in an effectively utilizable form as a raw material of nickel industry material, by separating efficiently impurity elements of iron, aluminum, manganese and the like, from the sulfuric acid aqueous solution containing nickel and cobalt, and the impurity elements, iron, aluminum, manganese and the like. The method is characterized by comprising the following steps (1) to (5). step (1): to subject the sulfuric acid aqueous solution to oxidation neutralization treatment. step (2): then, to subject the solution to neutralization treatment, and to separate and recover mixed hydroxides containing nickel and cobalt. step (3): to subject the mixed hydroxides to dissolution treatment in a sulfuric acid solution having a concentration of equal to or higher than 50% by mass. step (4): to subject the concentrated solution to solvent extraction treatment, using a phosphate ester-based acidic extraction agent.

Abstract: A process for the treatment of a solution containing at least ferric ions, and one or more metal values, said process including the step of maintaining a controlled concentration of ferric ions in solution for a sufficient residence time to control iron hydroxide or oxide crystal growth, and precipitating the iron as a relatively crystalline iron hydroxide or oxide while minimising the loss of the ore or more metal values with the iron hydroxide or oxide.

Abstract: A process for the separation of nickel, cobalt or both from impurity elements selected from one or more of calcium, magnesium, manganese and chloride contained in a leach solution, the process comprising the step of subjecting the leach solution to solvent extraction using a carboxylic acid (such as Versatic 10), a hydroxyoxime such as LIX 63, a kinetic accelerator such as TBP, and optionally a stabilizer.

Abstract: The present application relates to novel gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where R1 is an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, R2 is —CH2—S—CH2COOR3 or —CH2—S—C1-C4-alkyl or —CH2—S—CH2CH(NH2)COOR3 or —CH2—S—CH2—CH(OH)—CH2(OH) or or derivatives thereof or —C?S(NH2), R3 is a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.

Abstract: In an adsorbent of the present invention, at least a surface and its vicinity thereof is composed of an apatite represented by the formula Ca10(PO4)6((OH)1-xAx)2, where A represents a halogen element and 0?x?1, and a phosphate group contained in the apatite is bonded to a trivalent metal ion. Further, preferably, the trivalent metal ion is Fe3+. According to the present invention, it is possible to provide an adsorbent capable of specifically adsorbing an object compound, an adsorption apparatus capable of separating and purifying the object compound easily and reliably, and a method capable of manufacturing such an adsorption apparatus easily in a short time.

Abstract: A hydrometallurgical resin-in-leach (RIL) process for directly recovering nickel and/or cobalt. Simultaneous pulp leaching by adding an acid or base, dissolves the metals of interest with adsorption of the metals rendered soluble in on ionic exchange resin. Following elution of the changed resin, purification of nickel and cobalt present in the eluate can be recovered by conventional methods, such as precipitation, extraction by solvents and membranes. The regenerated resin is recirculated for further use.

Abstract: A process for the recovery of nickel and cobalt from nickel and cobalt containing ores, including the steps of first leaching a laterite ore and/or a partially oxidized sulfide ore with an acid solution to produce a pregnant leach solution containing at least dissolved nickel, cobalt and ferric ions, and subsequently leaching a sulfide ore or concentrate with the pregnant leach solution to produce a product liquor. Alternatively, the laterite ore and/or partially oxidized sulfide ore can be leached in a combined leach with the sulfide ore or concentrate. The ferric ion content in the pregnant leach solution or in the combined leach is sufficient to maintain the oxidation and reduction potential in the sulfide leach high enough to assist in leaching nickel from the sulfide ore or concentrate.

Abstract: A heap leach process for the recovery of nickel and cobalt from a lateritic ore, said process including the steps of leaching and/or agglomerating the ore with a lixiviant that includes ferrous ions, wherein the lixiviant is able to liberate cobalt from the cobalt containing minerals within the ore in preference to nickel, to produce a cobalt rich pregnant leach solution relatively free of nickel.

Abstract: A process for separating one or more metal ions forming a first group of metal ions such as copper, zinc and ferric ions, from one or more other metal ions forming a second group of metal ions such as cobalt and nickel, comprising: contacting an aqueous solution comprising said first and second groups of metal ions with an organic solution comprising a phosphinic acid and a hydroxyoxime to extract one of said groups of metal ions into the organic phase, and separating the organic and aqueous phases.

Abstract: There are provided processes for extracting aluminum ions from aluminous ores. Such processes can be used with various types of aluminous ores such as aluminous ores comprising various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof.

Abstract: [(O3/2)SiCH2CH2SX]a[Si(O4/2)]b[WSi(O3/2)]c[VSi(O3/2)]d wherein X is selected from (CR1R2)eNR5CO NHR, (CR1R2)eNR5CSNHR, W when present is selected from (CR6R7)eZR, (CH2)3SR1(CH2)3NRR1, (CH2)eSR8, CH2CH2S (CR1R2)fNR5CONHR, CH2CH2S(CR1R2),NR5CSNHR, CH2CH2S(CH2)fOR; Z is O or S, R, R1-7 are independently selected from hydrogen, alkyl group, aryl group or alkylaryl group, R8 is selected from [CH2CH2NR1]PR and (CR1R2)mSR9 where R9 is hydrogen, C1-22-alkyl group, and V is a group which is optionally substituted and selected from a C1-22-alkyl group, C2-22-alkenyl group, a C2-22-alkynyl group or an aryl group.

Abstract: The present invention relates to a process for the removal of metal catalyst degradation products from a bleed stream of a catalytic chemical reaction process, wherein the catalyst is based on a metal selected from those in group VIII of the periodic table, chromium, copper, molybdenum, tungsten, rhenium, vanadium, titanium and zirconium, said process comprising treatment of the bleed stream with an alkali metal carbonate or ammonium carbonate source to form a solid complex or an aqueous solution of said solid complex, and removal of the solid complex or the aqueous solution of said solid complex from the bleed stream.

Abstract: In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16% wt of sulfuric acid to the carbonylate to control sulfuric acid concentration in the carbonylate/acid mixture, before accounting for any acid consuming reaction, to a value of from 2% to 10% by weight. Single step and multistage liquid/liquid extraction techniques as well as vapour/liquid extraction techniques followed by the absorption of cobalt from the vapour in an organic liquid both benefit from this improvement.

Abstract: Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H2S, Na2S, K2S, (NH4)2S, and CaSx. The sulfur content typically is from about 0.2 to about 10% above the residual sulfur in the red mud. Sulfidized red mud is an improved sorbent compared to red mud for most of the heavy metals tested (Hg, Cr, Pb, Cu, Zn, Cd, Se, Th, and U). Unlike red mud, sulfidized red mud does not leach naturally contained metals. Sulfidized red mud also prevents leaching of metals when mixed with red mud. Mixtures of sulfidized red mud and red mud are more effective for sorbing other ions, such as As, Co, Mn, and Sr, than sulfidized red mud alone.

Abstract: The invention relates to a method, by means of which the valuable metals contained in a sulphidic, multicomponent concentrate are recovered using hydrometallurgical treatment. One constituent of the concentrate is copper sulphide, which is leached using an alkali chloride-copper (II) chloride solution. The sulphides of other valuable metals, such as zinc, nickel, cobalt and lead are leached before copper leaching and each is recovered as a separate product before copper recovery.

Abstract: The present disclosure is directed towards systems and methods for the treatment of wastewater. A system in accordance with one particular embodiment may include a vacuum filter band system configured to receive a saturated resin tank from a front end system, the vacuum filter band system configured to generate a slurry from the saturated resin tank and to provide a cascading resin rinse to the slurry. The system may further include a repetitive stripping system configured to receive a metal-filled purification unit from a metal specific purification system. The repetitive stripping system may be further configured to sequentially apply the contents of a plurality of acid tanks to the metal-filled purification unit to generate a metal salt. Numerous other embodiments are also within the scope of the present disclosure.

Abstract: A process for recovering catalytic metals from fine catalyst slurried in heavy oil comprises pyrolizing fine catalyst slurried in heavy oil to provide one or more lighter oil products and a coke-like material and recovering catalytic metals from the coke-like material.

Abstract: The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.

Abstract: The present invention relates generally to a method of extracting cobalt and other impurity metals from a concentrated nickel sulphate solution by a solvent extraction process whereby a cationic solvent extractant is separately pre-equilibrated with a portion of a purified nickel sulphate solution in such a manner that it is loaded with nickel without precipitating insoluble nickel double salts. The nickel loaded extracted is then transferred to an impure cobalt nickel solution where the cobalt and certain other impurity metals exchange with nickel leaving a purified concentrated nickel sulphate solution suitable for hydrogen reduction or electrowinning. The cobalt loaded extractant is stripped with dilute sulphuric acid before being recycled while an aqueous cobalt stripped solution is further processed to recover cobalt.

Abstract: The invention relates to a method for reversing the dispersion formed in the mixing section of liquid-liquid extraction and kept condensed in the separation section and the separated solutions form the rear end of the separation section to flow back towards the feed end of the separation section. The invention also refers to the extraction equipment for implementing the reversed flow.

Abstract: The present invention relates to a resin which is a copolymer of a polystyrene and a non-styrenic polymer, wherein the non-styrenic polymer includes the following subunit: Formula (I) wherein Rb is a divalent linking group, preferably alkylene, and most preferably (—CH2—CH2—; and Rd is NH, NR, O or absent. Preferably the resin has an acrylic backbone.