A process is disclosed to extract metal values selected from the group consisting of cobalt, molybdenum, nickel, tungsten, and vanadium from metal-containing particles, such as spent hydroprocessing catalyst particles containing carbon residue. In this process, the spent catalyst particles are roasted in an oxygen-containing gas at a temperature of from 400.degree.
US2584700A US45862A US4586248A US2584700A US 2584700 A US2584700 A US 2584700A US 45862 A US45862 A US 45862A US 4586248 A US4586248 A US 4586248A US 2584700 A US2584700 A US 2584700A Authority US United States Prior art keywords iron chromium ore leaching nickel Prior art date 1948-08-24 Legal status (The legal status is an assumption and is not a legal conclusion.
The invention provides a hydrometallurgical process for the recovery of metals. In particular, an aqueous feed solution derived from acid leaching is provided. The aqueous feed solution contains nickel and/or cobalt ions. The pH of the solution is maintained at a level between about 2 and 6. The aqueous feed solution is contacted with a water-immiscible organic phase containing an extractant
A finely divided product containing Ni and Fe is dissolved in a sulfate-containing solvent in at least two stages and in the presence of an alkali metal and an oxidant for preciptating the Fe as alkali jarosite while Ni remains in solution which is subjected to an after-treatment. Similar processes can be used to separate cobalt and/or chromium from products containing either or both of these
Primary nickel is produced from both lateritic and sulfidic ores. Lateritic ores are formed by prolonged weathering of ultramafic rocks. The laterite deposits exhibit graded layers of ore, with high iron, low nickel ore on top and low iron, high nickel ore below.
2012-5-29 · The present invention is directed to a process for the instantaneous control of precipitation of nickel and cobalt present in the leach liquor, by adjusting the pH of the solution, which process comprises the steps of adjusting the pH of a leach liquor containing nickel, cobalt and other elements dissolved in the acidic leaching process under pressure, since the balanced concentration in
Nickel-Chromium-Cobalt Alloys The addition of cobalt and molybdenum imparts solid-solution strengthening and high levels of creep-rupture strength to alloy 617 (UNS N06617). The addition of cobalt to HR-160 (N12160) provides outstanding resistance to various forms of high-temperature corrosion attacks, such as sulphidation and chloride attack
2020-7-20 · Very little has been reported in the literature regarding the prevention of chromium leaching from waste slag. A Japanese patent claims to reduce the chromium leachability of chrome ore slag by mixing silica with the powdered slag, followed by calcining at 900° to 1,300° C„ Eguchi and Uchida studied the fixing of chromium in Cr2O3- FeO-CaO
A method is provided for the removal of chromium from leach liquors produced during high pressure leaching of laterite ores in an autoclave, by addition to the autoclave of carbon in a quantity of about 0.5%-1% by weight with reference to the total dry feed.
A process is described for the recovery of nickel and/or cobalt from laterite or partially oxidized lateritic ores having a substantial proportion of the iron present in the ferrous state. The process includes providing a laterite or partially oxidized laterite ore wherein a substantial proportion of the iron present in the ore is in the ferrous state; acid leaching the ore to provide a
2015-5-18 · leaching plants It can treat the lower grade resources remaining after smelters have taken their pick It can produce Ni metal or nickel oxides to feed stainless steel plants or mixed nickel cobalt hydroxide to feed existing nickel refineries Process operating costs in the range US$2.00 to $3.00/lb (before credits) have been confirmed,
2006-8-1 · The precipitation of nickel and cobalt by 99.9% and 99%, correspondingly, was accomplished by gradually raising the initial pH of the leach liquor to a value of 9.0, at such a rate as to keep supersaturation of nickel and cobalt as low as possible, within a practical period of time. At those conditions, manganese precipitation reached 80%.
2020-7-20 · Very little has been reported in the literature regarding the prevention of chromium leaching from waste slag. A Japanese patent claims to reduce the chromium leachability of chrome ore slag by mixing silica with the powdered slag, followed by calcining at 900° to 1,300° C„ Eguchi and Uchida studied the fixing of chromium in Cr2O3- FeO-CaO
Nickel-Chromium-Cobalt Alloys The addition of cobalt and molybdenum imparts solid-solution strengthening and high levels of creep-rupture strength to alloy 617 (UNS N06617). The addition of cobalt to HR-160 (N12160) provides outstanding resistance to various forms of high-temperature corrosion attacks, such as sulphidation and chloride attack
1 CHEMICAL ASPECTS OF MIXED NICKEL-COBALT HYDROXIDE PRECIPITATION AND REFINING By 1James Vaughan, 1William Hawker, 2David White 1The University of Queensland, School of Chemical Engineering, Australia
Patent EP1790739A1 Process for extraction of nickel The present invention embodies a process for extraction of nickel, cobalt, and other metals from laterite ores by heap leaching, and of the product obtained as well ALTA 2018 Nickel-Cobalt-Copper, Uranium-REE-Li & YES, we are still accepting abstracts for all sessions! More information .
2008-3-1 · The experiments of Kumar et al., 1990, Kumar et al., 1993, who studied the leaching of synthetic nickel- and cobalt-doped goethite samples in mixtures of sulphuric and sulphurous acids, suggested that the incorporation of cobalt into the goethite structure is favoured over nickel and that surface-induced precipitation of nickel is preferred
2014-9-20 · Process for recovering valuable metals from oxide ore. Australian Patent 725,800. Neudorf, D., 2006. Method for nickel and cobalt recovery from laterite ores by reaction with concentrated acid and water leaching. US Patent 2006/0002835 A1. Neudorf, D., 2007
Patent EP1790739A1 Process for extraction of nickel The present invention embodies a process for extraction of nickel, cobalt, and other metals from laterite ores by heap leaching, and of the product obtained as well ALTA 2018 Nickel-Cobalt-Copper, Uranium-REE-Li & YES, we are still accepting abstracts for all sessions! More information .
Agatzini S. and Dimaki D. (1991) Recovery of nickel and cobalt from low-grade nickel oxide ores by heap leaching with diluted sulphuric acid at room temperature. Greek Patent
2020-7-20 · Very little has been reported in the literature regarding the prevention of chromium leaching from waste slag. A Japanese patent claims to reduce the chromium leachability of chrome ore slag by mixing silica with the powdered slag, followed by calcining at 900° to 1,300° C„ Eguchi and Uchida studied the fixing of chromium in Cr2O3- FeO-CaO
Successful Leaching 100% Nickel, Manganese, Cobalt (NMC) and Lithium Using American Manganese Inc.'s Patent Pending Process for Recycling Electric Vehicle Batteries Shelly Kumar April 11th, 2017
What is claimed: 1. A hydrometallurgical process comprising: a. providing an aqueous pulp comprising laterite, nickeliferous oxide, or cobaltiferous oxide ore, or a mixture thereof containing a first metal selected from the group consisting of nickel, cobalt, and mixtures thereof together with a second metal different from the first metal; b. then leaching the aqueous pulp with a mineral acid
M. H. Caron, “Fundamental and Practical Factors in Ammonia Leach of Nickel and Cobalt Ores,” Trans. TMS-AIME, 188 (1950) pp. 67–90 Google Scholar 3. N. Zubryckyj, P. T. O’Kane, and V. N. Mackiw, “Leaching Process for Reduced Nickel and Cobalt-Bearing Lateritic Ores,” Canadian Patent 811,078, April 1969 Google Scholar
Nickel–cobalt alloy nanosheets obtained from reductive hydrothermaltreatment of nickel–cobalt hydroxide carbonate. Mohammad Yeganeh Ghotbi. Get Price; Nickel, cobalt and chromium sensitivity in 1. Contact Dermatitis. 1979 Dec;5(6):3714. Nickel, cobalt and chromium sensitivity in patients with pompholyx (dyshidrotic eczema). Veien NK
2019-4-2 · The refinery of mixed hydroxide precipitate (MHP) from nickel laterite processing by acidic re-leaching will generate a concentrated nickel solution containing some magnesium difficult to remove. Fluorite precipitation method is often used for nickel purification from magnesium contamination, causing serious risk of environmental pollution.
The disadvantage of this method is the inability to control the Rel shall provide Cr 2 About 3 /FeO in grains of chromite, the impossibility of extracting impurity oxides of Nickel and cobalt. Known combined method for processing an integrated iron ore, chromium, Nickel and cobalt [Japan patent No. 2522, CL 9CQ, Appl. 19.06.1963, publ. 15.04.1964].
Acid Leaching for Metallic Impurities Evaluation of Some Mineral Ores in Nigeria *R.L. Tyohemba 1 & S. K. Emgba 2. Abstract. There is every need to access the impurity ratio of mineral ores in order to furnish investors and industrialists with information required to weigh the gains of venturing into their exploration.
Nickel–cobalt alloy nanosheets obtained from reductive hydrothermaltreatment of nickel–cobalt hydroxide carbonate. Mohammad Yeganeh Ghotbi. Get Price; Nickel, cobalt and chromium sensitivity in 1. Contact Dermatitis. 1979 Dec;5(6):3714. Nickel, cobalt and chromium sensitivity in patients with pompholyx (dyshidrotic eczema). Veien NK
Acid Leaching for Metallic Impurities Evaluation of Some Mineral Ores in Nigeria *R.L. Tyohemba 1 & S. K. Emgba 2. Abstract. There is every need to access the impurity ratio of mineral ores in order to furnish investors and industrialists with information required to weigh the gains of venturing into their exploration.
2020-6-26 · The Bureau of Mines investigated a method for increasing the leaching rate of bulk superalloy scrap to facilitate recycling and recovery of critical metals such as Ni, Co, and Cr. Three superalloys were investigated, the cast-nickel-base superalloy IN-738, the wrought-nickel-base superalloy Rene-41, and the cast-cobalt-base superalloy Mar-M-509.
2020-7-13 · @article{osti_7073890, title = {Experimental nickel-cobalt recovery from melt-refined superalloy scrap anodes. Report of investigations/1986}, author = {Holman, J L and Neumeier, L A}, abstractNote = {The Bureau of Mines is conducting research to recover strategic and critical metals such as Ni, Co, and Cr from mixed contaminated superalloy scrap.
United States Patent Number 8,361,191 was issued January 29, 2013 with the title “Low Acid Leaching of Nickel and Cobalt from Lean Iron-Containing Nickel Ores”. Dr.
Method of recovering metal from metalliferous waste US3966569; metal can be recovered from metal-containing waste by means of liquid extraction processes.The waste is leached with sulphuric acid.The resulting metal sulphate solution is contacted with an organic solution of a reagent, so as to extract iron and zinc to the organic solution.The organic solution is washed with sulphuric acid in
Supported nickel catalysts, containing 2.5% to 20% of nickel metal, are widely used . pyrometallurgical technique, whose main product is the maximum of nickel extraction (73%) could be achieved by precipitating with sulphide generated by Desulfovibrio Flow diagram of the acid leaching based Ni recovery process...
Nickel/Cobalt Separation by Ozonation, Selective Leaching of Ni/Cu/Fe/S Matte, U.S. Patent 4,094,754 (1978). Worked with firm producing chromated copper arsenate to establish secondary sources for its copper, chromium, and arsenic raw materials.
A framework to ensure sustainable cobalt sourcing. Umicore is the first company in the world to have introduced a Sustainable Procurement Framework for Cobalt and is the first to obtain external validation for its ethical procurement approach in this area.