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Alkaline earth metal saponification and extraction method of acidic extractant

An acid extraction agent and alkaline earth metal soap technology, which is applied in the field of hydrometallurgical extraction and separation, can solve the problems of environmental discharge, use of soluble chloride, complicated treatment of harmful waste water, etc., and achieves the effect of solving environmental pollution and avoiding pollution.

Active Publication Date: 2012-02-15
GANZHOU RECYCLE NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the defects of the above-mentioned prior art that need to use soluble chloride and discharge harmful waste water to the environment or complicated follow-up treatment

Method used

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  • Alkaline earth metal saponification and extraction method of acidic extractant
  • Alkaline earth metal saponification and extraction method of acidic extractant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 2 cubic meters of saponification water in the saponification pot, then add 8.0 cubic meters of P507 blank organic phase (P507 and kerosene weight ratio 1: 1), start stirring, add 240Kg calcium carbonate powder, stop stirring after continuing to stir for 70 minutes, and let stand for 120 Minutes, after confirming that the two-phase interface is clear, open the bottom valve of the saponification pot to discharge a small amount of residue and saponification water to the low-level wastewater tank to clarify and recover a small amount of organic phase; part of the clarified saponification wastewater is pumped into the saponification pot for recycling; the residue and another part of saponification The waste water is sent to another reaction pot, and calcium carbonate powder is added to adjust the pH to 6.5-7, and the clear liquid is discharged after filtration.

[0025] This calcium saponified organic phase is introduced into the first-stage mixing chamber of the 110-stag...

Embodiment 2

[0027] Add 900 liters of clarified saponification water in the saponification pot, then add 8.0 cubic P204 blank organic phase (P204 and kerosene weight ratio 1: 2), start stirring, add 40Kg magnesium hydroxide powder, stop stirring after continuing to stir for 20 minutes, static Set aside for 20 minutes, after confirming that the two-phase interface is clear, open the bottom valve of the saponification pot to discharge a small amount of residue and saponification water into the low-level waste water tank to clarify and recover a small amount of organic phase; part of the clarified saponification waste water is pumped into the saponification pot for recycling; the residue and other Part of the saponification wastewater is sent to another reaction pot, and calcium hydroxide is added to adjust the pH to 6.5-8, and the clear liquid is discharged after clarification.

[0028] The magnesium saponified organic phase is introduced into the mixing chamber of the first stage of the 40-s...

Embodiment 3

[0030] Add 1.2 cubic meters of clear saponified water into the saponification pot, and then add 8.0 cubic meters of C 272 Blank organic phase (weight ratio C272: thinner=2: 3, diluent is weight ratio sulfonated kerosene: isooctyl alcohol=8: 2), start stirring, add 100Kg calcium hydroxide powder, stop stirring after continuing to stir for 30 minutes , let it stand for 40 minutes, and after confirming that the two-phase interface is clear, open the bottom valve of the saponification pot to discharge a small amount of residue and saponification water into the low-level wastewater tank to clarify and recover a small amount of organic phase; part of the clarified saponification wastewater is pumped into the saponification pot for recycling; the residue And another part of saponification waste water is sent to another reaction pot, and calcium hydroxide powder is added to adjust the pH to 6.5-8, and the clear liquid is discharged after filtration.

[0031] This calcium saponified or...

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Abstract

The invention discloses an alkaline earth metal saponification and extraction method of an acidic extractant. In the method, a saponification reaction is performed on alkaline earth metal oxides, hydroxides or carbonates directly to obtain an alkaline earth metal saponification salt of the acidic extractant and water; saponification water only contains a very small amount of saponifying agent residue and a very small amount of spent acid; clarified saponification water is recycled; and after recovering a small amount of organic phase, redundant saponification water can be discharged after being neutralized and filtered. The method not only realizes the direct saponification of the acidic extractant by using the low-cost and easily-obtained alkaline earth metal oxides, hydroxides or carbonates, but also solves the problems of consuming chemical raw materials such as a chloride, an ammonium salt and the like and generating harmful waste water in the prior art and simultaneously solves the problem of environmental pollution caused by ammonia nitrogen or high cost for treating ammonia nitrogen pollutants. In the extraction method, saponated alkaline earth metal ions are eluted by adopting an extraction raffinate, so the situation that the extraction raffinate is polluted by alkaline earth metal elements is avoided.

Description

technical field [0001] The invention relates to alkaline earth metal saponification of an acidic extractant and an extraction and separation method thereof, belonging to the technical field of hydrometallurgical extraction and separation. Background technique [0002] The acid-base neutralization reaction between acidic extractants such as P507, P204, C272 and alkaline substances is called saponification reaction, and the reacting substances are called saponification agents. The traditional process is to react acidic extractant with sodium hydroxide solution or ammonia water, which are called sodium soap or ammonia soap respectively. However, due to the high cost of sodium hydroxide and the harmful effects of ammonia nitrogen on the environment, people have to look for cheaper and more environmentally friendly saponification agents and saponification methods. The oxides, hydroxides and carbonates of alkaline earth metals can also undergo saponification with acidic extractan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/26
CPCY02P10/20
Inventor 刘明彪龚斌袁军肖祖高黄绍权谢楠
Owner GANZHOU RECYCLE NEW TECH
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