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Method and device for continuously preparing acidic phosphor/phosphine extractant rare earth soap by lime milk

A technology for extracting agent and milk of lime, applied in the field of continuous saponification of milk of lime to prepare extractant rare earth soap

Inactive Publication Date: 2009-03-25
张宝藏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to obtain the preparation method of acidic phosphorus / phosphine extractant rare earth soap which can effectively solve the problem of environmental pollution, is low in cost, rich in resources and easy to obtain, and can be easily connected with the existing process flow and production equipment of the rare earth separation plant

Method used

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  • Method and device for continuously preparing acidic phosphor/phosphine extractant rare earth soap by lime milk
  • Method and device for continuously preparing acidic phosphor/phosphine extractant rare earth soap by lime milk
  • Method and device for continuously preparing acidic phosphor/phosphine extractant rare earth soap by lime milk

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: the continuous preparation of extractant lanthanum soap organic phase in lanthanum cerium separation flow process

[0054] Process conditions:

[0055] Milk of lime: OH - The concentration is 5.0N, the flow rate is 3.2 liters / minute

[0056] P204 kerosene solution of organic phase 1.25mol / L, flow rate 35 liters / min

[0057] Lanthanum chloride solution LaCl 3 The concentration is 1.50mol / L, the flow rate is 3.5L / min

[0058] The above materials are introduced into the mixing and settling tank at the same time, mixed for 4 * 3 minutes, and clarified for 40 minutes. After the balance, the measured lanthanum soap concentration in the organic phase is 0.145-0.150mol / L, and the water phase remains (LaCl 3 )<0.01mol / L.

Embodiment 2

[0059] Embodiment 2: the continuous preparation of extractant LaCe soap organic phase in cerium-praseodymium grouping flow process

[0060] Process conditions:

[0061] Milk of lime: OH - The concentration is 4.5N, the flow rate is 3.6 l / min

[0062] P507 kerosene solution of organic phase 1.10mol / L, flow rate 40 liters / min

[0063] Lanthanum cerium chloride solution ReCl 3 The concentration is 1.55mol / L, the flow rate is 3.5L / min

[0064] Import the above materials into the mixing and settling tank at the same time, mix for 3.5×3 minutes, and clarify for 50 minutes. After equilibrium, the measured concentration of lanthanum and cerium soap in the organic phase is 0.130-0.140mol / L, and the residual rare earth (ReCl 3 )<0.01mol / L.

Embodiment 3

[0065] Embodiment 3: Continuous preparation of extractant La—Gd mixed rare earth soap organic phase in dysprosium holmium grouping flow process

[0066] Process conditions:

[0067] Milk of lime: OH - The concentration is 4.5N, the flow rate is 5.0L / min

[0068] P507 kerosene solution of organic phase 1.30mol / L, flow rate 50 liters / min

[0069] La-Gd solution ReCl 3 The concentration is 1.45mol / L, the flow rate is 5.2L / min

[0070] Import the above materials into the mixing and settling tank at the same time, mix for 3.5×3 minutes, and clarify for 45 minutes. 3 )<0.01mol / L.

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Abstract

The invention provides a method for preparing a rare earth soap of acid organophosphorus / phosphoric extractant by lime cream continuous saponification. The method comprises the following steps: after the assimilation of calcium oxide, lime cream with the OH<-> concentration of 1.0N to 10N is prepared; extractant with 10 volume proportions to 50 volume proportions and diluent with 90 volume proportions to 50 volume proportions are prepared into an extracted organic phase, and the concentration thereof is 0.3mol / L to 1.5mol / L, wherein, the extractant is the acid organophosphorus / phosphoric extractant; rare earth salt solution with the concentration of 0mol / L to 2.0mol / L is prepared; and the obtained lime cream, the extracted organic phase and the rare earth salt solution are continuously blended and defecated according to a flow ratio of (3 to 6):(30 to 60):(3 to 6), and then a rare earth soap organic phase of the extractant is obtained, wherein, the average blending time is 3min to 20min and the average defecating time is 10min to 60min. The invention also provides a device for preparing the rare earth soap of acid organophosphorus / phosphoric extractant by lime cream continuous saponification.

Description

technical field [0001] The invention relates to a method for extracting and separating rare earth elements by a solvent extraction method, in particular to a method and a device for preparing extractant rare earth soap by continuous saponification of lime milk. Background technique [0002] The solution extraction technology in hydrometallurgy is to mix and contact the elements to be extracted and separated that exist in the aqueous solution (hereinafter referred to as the water phase) with an organic solvent (hereinafter referred to as the organic phase) that is incompatible with the aqueous solution. It is extracted into the organic phase, and the extraction and mutual separation of elements are realized by controlling the concentration, acidity and other conditions of the two phases. This technology is widely used in the extraction of rare earth metals. In addition, the extraction of certain non-ferrous metals such as nickel, cobalt, zirconium, hafnium, and trivalent and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38C22B59/00
CPCY02P10/20
Inventor 张宝藏
Owner 张宝藏
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