CN-116426762-B - Palladium extractant and preparation method thereof

Abstract

The invention provides a palladium extractant and a preparation method thereof, wherein the extractant is prepared from the following raw materials, by weight, 20-50% of diisoamyl sulfide, 5-15% of isooctyl alcohol and 50-70% of methyl pelargonate. The extraction agent of palladium can reach 99.98 percent, and the back extraction rate can reach more than 98 percent.

Inventors

• XING XIAOZHONG
• SONG HONGRU
• ZHANG YAN
• ZHOU HELI
• CHEN GUOJU
• DAI JIANJUN
• CHEN YUNFENG
• LI RUI

Assignees

• 金川集团铜业有限公司
• 金川集团股份有限公司

Dates

Publication Date

20260505

Application Date

20230320

Claims (1)

1. 1. A preparation method of a palladium extractant is characterized in that the palladium extractant is prepared from the following raw materials, by weight, 20-50% of diisoamyl sulfide, 5-15% of isooctyl alcohol and 50-70% of methyl pelargonate, wherein the sum of the components reaches 100%; the preparation method comprises the steps of adding diisoamyl sulfide into a reaction vessel, heating to 20-50 ℃, stirring for 3-7min, adding methyl pelargonate, stirring for 3-7min, adding isooctyl alcohol, stirring for 3-7min to obtain a crude palladium extractant, and washing the crude palladium extractant twice by using a sodium chloride solution with the concentration of 40% to obtain an oil phase and a water phase, wherein the oil phase is a finished palladium extractant.

Description

Palladium extractant and preparation method thereof Technical Field The invention belongs to the technical field of metallurgical reagents, and relates to a palladium extractant and a preparation method thereof. Background In noble metal production, the conventional palladium extractant at home and abroad is prepared by combining diisoamyl sulfide, diethylbenzene and n-dodecane according to the proportion of 3:2:5, and has the following problems of small extraction capacity, low efficiency, more back extraction floccules, short service life, easy pipeline blockage in the later stage, influence on normal production, and great harm to operators because the operators work in the environment with higher diethylbenzene and n-dodecane toxicity for a long time. Disclosure of Invention The invention aims to provide a palladium extractant and a preparation method thereof, aiming at solving the problems of small extraction capacity, low efficiency, more back-extraction floccules and harm to the health of operators in the prior art. Therefore, the invention adopts the following technical scheme: the palladium extractant comprises, by mass, 20-50% of diisoamyl sulfide, 5-15% of isooctyl alcohol and 50-70% of methyl pelargonate, wherein the sum of the components reaches 100%. The invention also discloses a preparation method of the palladium extractant, which comprises the steps of adding diisoamyl sulfide into a reaction vessel, heating to 20-50 ℃, stirring for 3-7min, adding YW, stirring for 3-7min, adding isooctyl alcohol, stirring for 3-7min to obtain a crude palladium extractant, and washing the crude palladium extractant by using sodium chloride solution to obtain an oil phase and a water phase, wherein the oil phase is a finished palladium extractant. Further, washing was performed using a sodium chloride solution having a concentration of 40%. Further, the crude palladium extractant was washed twice with sodium chloride solution. The mechanism of the invention for preparing the palladium extractant is that after the preparation proportion of the reagent is changed, isooctanol and methyl nonane can reduce the specific gravity and viscosity of the extractant more than diethylbenzene and n-dodecane, the two-phase flow and separation are facilitated, the purity of the prepared extractant is higher, a large number of experiments prove that under the condition of 30 ℃, methyl nonanoate is firstly added into diisoamyl sulfide, and after the diisoamyl sulfide and the methyl nonane are mixed and stirred for 5min, the isooctanol is mixed and stirred for 5min again, and finally 40% sodium chloride is used for dissolving and washing twice, so that the efficiency of extracting palladium by the obtained palladium extract zou is higher, the extraction performance is more stable, and flocculent generation is avoided. The invention has the beneficial effects that: (1) The isooctanol is used for replacing diethylbenzene as a diluent in the extractant, compared with diethylbenzene, the isooctanol is nontoxic, the dilution effect is better, methyl pelargonate is used for replacing n-dodecane and is used as a solvent, and compared with methyl pelargonate, the methyl pelargonate has better dissolution rate and no toxicity; (2) The extractant hardly generates floccules in the back extraction process, the service life is prolonged by more than 2 times, the production operation does not generate blockage of pipelines, the production efficiency is high, the toxicity is low, and the extractant has good popularization value and economic benefit. Detailed Description The invention is illustrated in detail below with reference to examples: Example 1 The palladium extractant comprises, by mass, 30% of diisoamyl sulfide, 10% of isooctyl alcohol and 60% of methyl pelargonate. The preparation method comprises the following steps: a palladium extractant is prepared through adding diisoamyl sulfide to reactor, heating to 30 deg.C, stirring for 5min, adding methyl nonanoate, stirring for 5min, adding isooctanol, stirring for 5min, and washing with 40% sodium chloride solution to obtain oil phase and water phase. The prepared palladium extractant is compared with the existing palladium extractant under the same condition, and the analysis and statistics result is shown in table 1, TABLE 1 As shown in an analysis statistical table, the extraction efficiency of the novel prepared palladium extractant is higher than that of the original palladium extractant by 0.64 percent, the back extraction rate is also higher than that of the original palladium extractant by 1.31 percent, floccules are basically not generated in the operation process, the probability of generating the waste extractant is very low, and the performances of the novel prepared palladium extractant are superior to those of the original palladium extractant. Example 2 The palladium extractant comprises, by mass, 30% of diisoamyl sulfide, 10% of isooctyl alcohol and 60% of methyl pelargon