Pre-separating and high-purity three-outlet extracting method

An extraction method and three-outlet technology, applied in the field of solvent extraction and separation of rare earth technology

Active Publication Date: 2016-05-11
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is the main shortcoming of the three-exit process

Method used

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  • Pre-separating and high-purity three-outlet extracting method
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  • Pre-separating and high-purity three-outlet extracting method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] After the rare earth chloride solution of Baotou light rare earth mine is grouped by Nd / Sm, the outlet water phase La-Nd mixed rare earth is the raw material of this example, and the rare earth concentration of the rare earth chloride feed solution is 1.5mol L -1 , pH﹦2~3, the rare earth distribution is as follows:

[0029] element La 2 o 3 CeO 2 PR 6 o 11 Nd 2 o 3 SM 2 o 3 W％ 26.3 52.1 6.8 14.8 ﹤0.01

[0030] The organic phase is extracted by the extractant P 507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester) and diluent kerosene, P in the organic phase 507 The concentration is 1.5mol L -1 , P 507 Saponification concentration is 0.56mol L -1 . With a kind of pre-separation high-purity three-outlet extraction method of the present invention, described embodiment 1——use the pre-separation high-purity three-outlet extraction method to separate the La-Nd mixed rare earths of light rare earth ore, and carry out extraction...

Embodiment 2

[0035] Sichuan bastnaesite was grouped by Nd / Sm to obtain La-Nd mixed rare earth chloride solution, which was used as the raw material of this example, and its rare earth concentration was 1.4mol L -1 , pH﹦2~3, the rare earth distribution is as follows:

[0036] element La 2 o 3 CeO 2 PR 6 o 11 Nd 2 o 3 SM 2 o 3 W％ 40.52 46.83 3.56 9.09 ﹤0.01

[0037] The organic phase is extracted by the extractant P 507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester) and diluent kerosene, P in the organic phase 507 The concentration is 1.5mol L -1 , P 507 The saponification concentration is 0.54mol L -1 . With a kind of pre-separation high-purity three-outlet extraction method of the present invention, described embodiment 1——use the pre-separation high-purity three-outlet extraction method to separate the La-Nd mixed rare earths of light rare earth ore, and carry out extraction and separation. The process flow used is shown in the appendix...

Embodiment 3

[0042] The GdTbDy enrichment produced from low yttrium ion adsorption type rare earth ore is used as raw material, and the rare earth concentration of the rare earth chloride solution is 1.2mol L -1 , pH≈3, the rare earth distribution is as follows:

[0043] element Gd 2 o 3 Tb 4 o 7 Dy 2 o 3 Ho 2 o 3 ∑ W％ 40.9 12.8 46 0.26 99.96

[0044] The organic phase is extracted by the extractant P 507 (2-ethylhexyl phosphate mono-2-ethylhexyl ester) and diluent kerosene, P in the organic phase 507 The concentration is 1.5mol L -1 , P 507 Saponification concentration is 0.56mol L -1 . With a kind of pre-separation high-purity three-outlet extraction method of the present invention, described embodiment 2---separate GdTbDy enrichment by pre-separation high-purity three-outlet extraction method, carry out extraction and separation, and the process flow used is shown in the appendix figure 2 shown. Due to the Tb in the GdTbDy enrichment ...

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Abstract

The invention belongs to the solvent extraction and rare earth separation technology, and relates to a pre-separating and high-purity three-outlet extracting method. The method comprises the pre-separating technology and the high-purity three-outlet extracting and separating technology. The pre-separating technology comprises a pre-separating and extracting section 1, a pre-separating and washing section and a pre-separating and extracting section 2. In the high-purity three-outlet technology, a third outlet serves as the boundary, the side close to an outlet water phase is a section hard to extract and separate, and the side close to an outlet organic phase is a section easy to extract and separate. According to the pre-separating and high-purity three-outlet extracting method, the pre-separating and extracting principle is adopted, multi-component raw materials are pre-separated, and the high-purity three-outlet technology is conducted through multiple ports. The content of components A easy to extract in the outlet water phase of the pre-separating and extracting section 1 and the outlet water phase of the pre-separating and extracting section 2 is controlled to be very low, the content of components C hard to extract in the outlet load organic phase in the pre-separating and washing section is controlled to be very low, high-purity products can be obtained at the third outlet, and therefore the quality and direct recovery rate of intermediate products can be improved. The overall technology treatment capability is improved, and the tank storage number of extraction agents and rare earth metals is reduced; and control is easy, the products are stable, acid-base consumption and waste water discharge are reduced, and environment friendliness is facilitated.

Description

technical field [0001] The present invention relates to a kind of pre-fractionated high-purity three-outlet extraction method, more specifically, it relates to a method for simultaneously obtaining three high-purity component products in a pre-fractionated high-purity three-outlet extraction separation process for multi-component raw materials The method belongs to the process technology of solvent extraction and separation of rare earth. Background technique [0002] Solvent extraction is a separation and purification method with a wide application field. It has the characteristics of high separation efficiency, large processing capacity, fast reaction speed, good phase separation effect, and low energy consumption. It is widely used in hydrometallurgy, petrochemical industry, non-ferrous metal smelting, Industrial fields such as nuclear fuel extraction and purification, pharmaceuticals and environmental protection. It has become an important means of production for the se...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/38
CPCC22B59/00C22B3/26Y02P10/20
Inventor 钟盛华钟业腾
Owner JIANGXI AGRICULTURAL UNIVERSITY
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