Process for absorbing and extracting valuable metal ions in leachate of laterite nickel ore by applying immobilized room temperature ionic liquid
A room temperature ionic liquid and valuable metal technology, applied in the direction of improving process efficiency, can solve the problems of complex composition, low recovery rate, and many equipment stages, and achieve high extraction efficiency, short operation time, and simple process operation. Effect
Inactive Publication Date: 2010-06-16
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology
However, the leach solution of lateritic nickel ore has the characteristics of high pH, complex composition, low content of main metal ions, and doping with organic phase and solid particles. The recovery rate of the chemical precipitation method is low, the entrainment phenomenon is serious, and the formation of secondary solid pollutants constitutes an environmental hazard; However, the general solvent extraction method has many defects such as many equipments (series), large footprint, large consumption of organic and inorganic reagents, high investment costs and high production costs, and the extraction efficiency of the extraction agent itself is not high, serious pollution, and the formation of production Low efficiency and poor competitiveness in the industry
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Embodiment 1
[0036] 1-decyl-3-methylimidazolium hexafluorophosphate is selected and immobilized on the montmorillonite carrier. After 48 hours of treatment, the loading rate can reach 77%.
[0037] Take the acidic leaching solution of nickel-cobalt ore, its pH value is 3.5, and the main component in the leaching solution is Cu 2+ : 3.5g / l; Ni 2+ : 1.2g / l; Co 2+ : 0.6g / l; Fe 2+ : 3.9g / l; Fe3 + : 9.5g / l.
[0038] At room temperature, the leaching solution was dripped into a vertically placed adsorption bed at a flow rate of 5ml / min, and the residual solution was collected at the bottom of the bed. Cycle through 2 times.
[0039] The amount of metal ions adsorbed by the loaded filler in the adsorption bed was analyzed by ultraviolet spectrophotometry. The calculation shows that the metal ion adsorption rates are: Cu 2+ : 70%; Ni 2+ : 81%; Co. 2+ : 84%; Fe 2+ : 55%; Fe3 + : 62%.
[0040] Take out the loaded filler that has adsorbed the metal ions in the adsorption bed, and place i...
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Abstract
The invention discloses a process for absorbing and extracting valuable metal ions in leachate of laterite nickel ore by applying immobilized room temperature ionic liquid, which comprises the following steps: 1) performing immobilization on the room temperature ionic liquid, namely 1-decyl-3-methylimidazole hexafluorophosphate or 1-decyl-3-methylimidazole tetrafluoroborate, immobilizing the room temperature ionic liquid to a porous solid absorption carrier to obtain an absorption reaction bed of the room temperature ionic liquid; 2) allowing a complex component, namely acid leachate obtained by leaching the laterite nickel ore to pass through the absorption reaction bed for performing metal ion absorption at room temperature to extract the valuable metal ions in the leachate; and 3) achieving the purpose of performing elution and extraction on the metal ions by adjusting the acidity and flow rate of eluent. Through the process, an effective extraction process for the acid leachate of the laterite nickel ore can be established; the process fully uses low-grade mineral resources, improves the comprehensive utilization rate of the mineral resources, reduces environmental pollution, improves economic benefit, and can be applied to the development of the conventional low-grade non-ferrous metal mines in China.
Description
technical field [0001] The invention relates to a new extraction process of laterite nickel ore acidic leaching solution, in particular to a method involving the formation of a metal ion adsorption bed after the room temperature ionic liquid is adsorbed and immobilized by a carrier, and the adsorption bed can be used for the extraction of the laterite nickel ore acidic leaching solution. Valence metal ions (such as Cu 2+ 、Ni 2+ 、Co 2+ etc.) for adsorption recovery. The invention belongs to the processing part of solution containing metal ions in the field of hydrometallurgy technology research. Background technique [0002] The leaching of minerals is an important unit operation in the field of hydrometallurgy. It uses chemical reagents to convert useful components in ores or concentrates into soluble compounds, and selectively dissolves them to obtain metal-containing solutions to achieve useful The process of separating components from impurity components or gangue com...
Claims
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IPC IPC(8): C22B3/24C22B15/00C22B23/00
CPCY02P10/20
Inventor 武名麟武彪刘学刘美林
Owner 有研资源环境技术研究院(北京)有限公司
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