Pre-fractionated high-purity three-outlet extraction method

An extraction method with three outlets, applied in the field of solvent extraction and separation of rare earths

Active Publication Date: 2017-08-11
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-fractionated high-purity three-outlet extraction method
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  • Pre-fractionated high-purity three-outlet extraction method

Examples

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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

[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 and separation. The process flow used is shown in the appendix figure 1 shown.

[0031] Thr...

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

[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 figure 2 shown.

[0038] Through a kind of pre-separation high-purity three-outlet extraction...

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

[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 with pre-separation high-purity three-outlet extraction method, carry out extraction and separation, and the technological process used is shown in the appendix figure 2 shown. Due to the Tb in the GdTbDy enrichment 4 o 7 The content of terbium is low, and terbium is a precious rare earth ...

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Abstract

A pre-separation high-purity three-outlet extraction method belongs to the solvent extraction separation rare earth technology. The invention includes a pre-separation process and a high-purity three-outlet extraction and separation process. The pre-separation extraction section 1, the pre-separation washing section and the pre-separation extraction section 2 constitute the pre-separation process. The high-purity three-outlet process is divided by the third outlet, the side close to the outlet water phase is the difficult-to-extract separation section, and the side close to the outlet organic phase is the easy-to-extract separation section. The invention adopts the principle of pre-separation and extraction, and enters into the high-purity three-outlet process through multiple ports through pre-separation of multi-component raw materials. Control the outlet water phase of the pre-subsection extraction section 1 and the pre-subsection extraction section 2 to contain the easy-to-extract component A very low, and control the outlet load of the pre-subsection washing section to contain the difficult-to-extract component C very low, which can make the third outlet Obtain high-purity products, thereby improving the quality and direct yield of intermediate products. The present invention improves the processing capacity of the overall process, reduces the amount of storage tanks for extractants and rare earth metals, and is easy to control to stabilize products, reduces acid and alkali consumption and waste water discharge, and is beneficial to environmental protection.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04
CPCC22B59/00C22B3/26Y02P10/20
Inventor 钟盛华钟业腾
Owner JIANGXI AGRICULTURAL UNIVERSITY
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