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Method for selective leaching separation of cobalt, nickel and molybdenum from high grade cobalt-nickel-molybdenum waste material

A high-grade, selective technology, applied in the direction of improving process efficiency, can solve problems that have not been reported, and achieve obvious effects, reduce adverse effects, and high selectivity

Active Publication Date: 2012-12-05
GEM CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

[0005] So far, the method of selective leaching and separation of cobalt, nickel and molybdenum from high-grade cobalt, nickel and molybdenum waste has not been reported

Method used

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  • Method for selective leaching separation of cobalt, nickel and molybdenum from high grade cobalt-nickel-molybdenum waste material
  • Method for selective leaching separation of cobalt, nickel and molybdenum from high grade cobalt-nickel-molybdenum waste material
  • Method for selective leaching separation of cobalt, nickel and molybdenum from high grade cobalt-nickel-molybdenum waste material

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Embodiment 1

[0033] A method for selectively leaching and separating cobalt, nickel and molybdenum from high-grade cobalt, nickel and molybdenum waste materials, comprising the following steps:

[0034] (1) Separation of molybdenum by acid-soluble method: get 100g of high-grade cobalt-nickel-molybdenum waste (from waste catalysts in the petrochemical industry, the metal content is cobalt: 24.53%, nickel: 19.1% by percentage of the total mass of cobalt-nickel-molybdenum waste , molybdenum: 10.8% and iron: 18.32%), be 1: 10 drop into water by solid-liquid ratio, stir, slowly add the concentrated hydrochloric acid that concentration is 12mol / L and ammonium nitrate carry out acid dissolution, the liquid-solid ratio of hydrochloric acid and ammonium nitrate The ratio was 1.5mL:1g, and the reaction was stirred at 85°C for 2 hours. Suction filtration, separation of solid and liquid, to obtain 820mL cobalt concentration of 26.5g / L, nickel concentration of 22.61g / L, molybdenum concentration of 445....

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Abstract

The invention provides a method for selective leaching separation of cobalt, nickel and molybdenum from a high grade cobalt-nickel-molybdenum waste material. The method comprises the following steps: (1) adopting an acid dissolution method to separate molybdenum; (2) adopting a neutralization method to separate iron; and (3) carrying out extraction to separate cobalt and nickel. For a high grade cobalt-nickel-molybdenum waste material, a hydrochloric acid-solid ammonium salt system is adopted as a leaching agent in the method of the present invention, a reasonable ratio of reactants is provided, cobalt and nickel are selectively leached while molybdenum is inhibited in residue, and a selective molybdenum and cobalt separation effect is significant. Iron removing rate and molybdenum removing rate in the filtrate containing cobalt and nickel are more than 99%, and cobalt loss rat and nickel loss rate are low, wherein the loss rates are respectively less than 2% and 18%. In addition, a solvent P507 is adopted to carry out extract separation of cobalt and nickel, such that selectivity is high, operation is simple and continuous, and automatic control is easy to perform. With the present invention, resources are saved to the maximal degree, adverse effects on environment are reduced, and great social benefits and economic benefits are provided.

Description

technical field [0001] The invention relates to a treatment method for industrial waste, in particular to a method for selectively leaching and separating cobalt, nickel and molybdenum from high-grade cobalt, nickel and molybdenum waste. Background technique [0002] Metal cobalt, nickel, and molybdenum have catalytic activity and are used to prepare catalysts for chemical reactions in small and medium-sized fertilizer plants and petrochemical industries. Metal cobalt, nickel and molybdenum in this type of catalyst can exist in various forms such as sulfide, oxide and salt. The catalyst containing cobalt, nickel and molybdenum is deactivated due to the influence of high temperature and the deposition and adsorption of harmful substances during use, resulting in a large amount of waste. If the waste is directly discarded, it will not only occupy a large amount of land resources, but also cause waste of metal cobalt, nickel, and molybdenum resources. Therefore, it is of grea...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B3/26C22B3/46C22B23/00C22B34/34
CPCY02P10/20
Inventor 郭苗苗王勤何显达谭翠丽闫梨
Owner GEM CO LTD
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