A method for extracting divalent cobalt ions by p204

A technology of divalent cobalt ions and cobalt ions, applied in the direction of improving process efficiency, etc., can solve the problems of low extraction rate of divalent cobalt ions, and achieve the effects of efficient and rapid extraction, cost reduction, and high extraction efficiency

Active Publication Date: 2019-02-22
SANMING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although P204 can extract a variety of metal ions and is cheap, the extraction rate of divalent cobalt ions is very low under conventional extraction conditions

Method used

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  • A method for extracting divalent cobalt ions by p204

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Comparison scheme
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Embodiment 1

[0035] A kind of P204 method that the present embodiment provides extracts divalent cobalt ion, it comprises the following steps:

[0036] 1) The divalent cobalt ion stock solution containing divalent cobalt ion with a mass concentration of 1 g / L is adjusted to a pH value of 11.5 with sodium hydroxide, so that the divalent cobalt ion stock solution becomes a flocculent suspension;

[0037] 2) Using P204 as an extractant, adding sulfonated kerosene to prepare an extracted organic phase with a volume concentration of P204 of 8%;

[0038] 3) After mixing the flocculent suspension with the extracted organic phase, the extraction reaction is carried out, the extraction reaction time is 2min, and the ratio of the volume of the extracted organic phase to the volume of the flocculent suspension is 1:1.05;

[0039] 4) Back-extract the loaded organic phase obtained by extraction, and the stripping conditions are: the ratio (O / A) is 7, and the sulfuric acid with a concentration of 1.5mol...

Embodiment 2

[0044] A kind of P204 method that the present embodiment provides extracts divalent cobalt ion, it comprises the following steps:

[0045] 1) The divalent cobalt ion stock solution containing divalent cobalt ion with a mass concentration of 2g / L is adjusted to a pH value of 11 with sodium hydroxide, so that the divalent cobalt ion stock solution becomes a flocculent suspension;

[0046] 2) Using P204 as an extractant, adding sulfonated kerosene to prepare an extracted organic phase with a volume concentration of P204 of 6%;

[0047] 3) After mixing the flocculent suspension with the extracted organic phase, the extraction reaction is carried out, the extraction reaction time is 2min, and the ratio of the volume of the extracted organic phase to the volume of the flocculent suspension is 1:1;

[0048] 4) Back-extracting the loaded organic phase obtained by extraction, the stripping conditions are as follows: the ratio (O / A) is 5, the sulfuric acid with a concentration of 0.2mol / L...

Embodiment 3

[0052] A kind of P204 method that the present embodiment provides extracts divalent cobalt ion, it comprises the following steps:

[0053] 1) The divalent cobalt ion stock solution containing divalent cobalt ion mass concentration of 4g / L is adjusted to pH 12 with sodium hydroxide, so that the divalent cobalt ion stock solution becomes a flocculent suspension;

[0054] 2) taking P204 as an extractant, adding sulfonated kerosene to prepare an extracted organic phase with a volume concentration of P204 of 5%;

[0055] 3) After mixing the flocculent suspension with the extracted organic phase, the extraction reaction is carried out, the extraction reaction time is 5min, and the ratio of the volume of the extracted organic phase to the volume of the flocculent suspension is 1:0.9;

[0056] 4) Back-extract the loaded organic phase obtained by extraction, and the stripping conditions are: the ratio (O / A) is 10, and the sulfuric acid with a concentration of 2mol / L is used for strippi...

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Abstract

The invention provides a method of extracting divalent cobalt ions by P204 and relates to the field of separation and extraction. The method comprises the following steps of: adjusting the pH value ofa divalent cobalt ion raw liquid by using an alkaline reagent to obtain a flocculent turbid liquid; mixing the P204 with a diluent to prepare an extracted organic phase; mixing the flocculent turbidliquid with the extracted organic phase and performing an extraction reaction to obtain a loaded organic phase; and performing counter-extraction on the loaded organic phase to obtain a divalent cobalt ion-enriched solution. The divalent cobalt ion raw liquid is converted into the flocculent turbid liquid with an alkaline cobalt hydroxide precipitate, and the cobalt hydroxide turbid liquid has a very high surface energy and chemical reaction activity, an extraction reaction is quickly performed on the cobalt hydroxide turbid liquid and the acidic P204, the single-stage extraction rate is high,the extraction time is short, the extraction reaction is thorough, the dosage of the P204 is small, and the method has a wide application prospect.

Description

technical field [0001] The invention relates to the field of extraction and separation, and in particular to a method for extracting divalent cobalt ions with P204. Background technique [0002] Cobalt is an important strategic element, which has the advantages of high melting point, good wear resistance, high strength, and strong magnetism. It is widely used in national defense, atomic energy, aerospace, electronics, chemical, medical and other industries. However, cobalt ore resources in my country are scarce, and the process of leaching-extraction-electrowinning is currently used to recover cobalt from cobalt-containing waste. In the extraction process of cobalt, Cyanex 272, P507 or N235 is mainly used as the extraction agent at present, but these extraction agents have high cost of extraction agent, low single-stage extraction rate, many extraction stages, and extraction process in the process of extracting and recovering cobalt. Long-term problems, the patent CN1019746...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/38C22B23/00
CPCY02P10/20
Inventor 李强李奇勇邹晓玲林欣吴春华
Owner SANMING UNIV
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