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Technology for separating light rare earth from southern ion-absorbing type rare earth ore

An ion adsorption type, light rare earth technology, applied in separation, can solve the problems of high acid-base consumption and insufficient product purity, and achieve the effects of reducing acid-base consumption, saving acid-base consumption, and high purity

Inactive Publication Date: 2019-10-08
NANCHANG HANGKONG UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

[0005] A process for separating light rare earths in southern ion-adsorption rare earth mines according to the present invention aims at the disadvantages of insufficient product purity and high acid-base consumption in existing methods for separating light rare-earth mixtures of lanthanum, cerium, praseodymium, and neodymium, and establishes a low-acid-base consumption separation process The process of directly obtaining 5N-grade lanthanum chloride, 3N-grade cerium chloride, 3N-grade praseodymium chloride and 4N-grade neodymium chloride from the light rare earth mixture obtained by grouping separation of southern ion-adsorption rare earth ores

Method used

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  • Technology for separating light rare earth from southern ion-absorbing type rare earth ore

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Experimental program
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Effect test

Embodiment 1

[0027] The P507 organic phase is a sulfonated kerosene solution of extractant P507, wherein the volume percentage of P507 is 30%, and the volume percentage of sulfonated kerosene is 70%. When used, a general saponification method must be adopted to obtain the corresponding rare earth saponified organic phase after corresponding saponification.

[0028] The composition of the light rare earth chloride aqueous solution obtained by group separation of the southern ion-adsorption type rare earth ore is: La60.0g / L, Ce7.0g / L, Pr13.0g / L, Nd60.0g / L, Sm0.00050g / L.

[0029] 1) La / LaCe / PrNd / Nd four-outlet fractional distillation extraction separation system

[0030] The 2N lanthanum saponification P507 organic phase is used as the extraction organic phase, the light rare earth chloride aqueous solution obtained by group separation of the southern ion-adsorption type rare earth ore is used as the feed liquid, and 3.0mol / L HCl is used as the washing acid. The 2N lanthanum saponification P...

Embodiment 2

[0040] The P507 organic phase is a sulfonated kerosene solution of extractant P507, wherein the volume percentage of P507 is 30%, and the volume percentage of sulfonated kerosene is 70%. When used, a general saponification method must be adopted to obtain the corresponding rare earth saponified organic phase after corresponding saponification.

[0041] The composition of the light rare earth chloride aqueous solution obtained by group separation of ion-adsorption type rare earth ores in the south is: La65.0g / L, Ce6.0g / L, Pr15.0g / L, Nd55.0g / L, Sm0.0010g / L.

[0042] 1) La / LaCe / PrNd / Nd four-outlet fractional distillation extraction separation system

[0043] The 2N lanthanum saponification P507 organic phase is used as the extraction organic phase, the light rare earth chloride aqueous solution obtained by group separation of the southern ion-adsorption type rare earth ore is used as the feed liquid, and 3.0mol / L HCl is used as the washing acid. The 2N lanthanum saponification P...

Embodiment 3

[0053] The P507 organic phase is a sulfonated kerosene solution of extractant P507, wherein the volume percentage of P507 is 30%, and the volume percentage of sulfonated kerosene is 70%. When used, a general saponification method must be adopted to obtain the corresponding rare earth saponified organic phase after corresponding saponification.

[0054] The composition of the light rare earth chloride aqueous solution obtained by group separation of the southern ion-adsorption type rare earth ore is: La 70.0g / L, Ce 5.0g / L, Pr 17.0g / L, Nd 50.0g / L, Sm 0.00020g / L.

[0055] 1) La / LaCe / PrNd / Nd four-outlet fractional distillation extraction separation system

[0056] The 2N lanthanum saponification P507 organic phase is used as the extraction organic phase, the light rare earth chloride aqueous solution obtained by group separation of the southern ion-adsorption type rare earth ore is used as the feed liquid, and 3.0mol / L HCl is used as the washing acid. The 2N lanthanum saponificat...

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Abstract

The invention provides a technology for separating light rare earth from southern ion-absorbing type rare earth ore. The technology is implemented by adopting an aqueous light rare earth chloride solution obtained by grouping separation from the southern ion-absorbing type rare earth ore as a feed liquid and P507 as an extraction agent, and comprises three fractional extraction systems, and the three fractional extraction systems comprise a La / LaCe / PrNd / Nd four-outlet fractional extraction and separation system, a La / Ce two-feed-inlet fractional extraction and separation system and a Pr / Nd two-feed-inlet fractional extraction and separation system. By means of combination of the three fractional extraction systems, four separation products including 5N-grade lanthanum chloride, 3N-grade cerium chloride, 3N-grade praseodymium chloride and 4N-grade neodymium chloride are obtained directly. The technology has the advantages of high purity of a target separation product, high yield of rareearth element, low acid-base consumption, short technological process, low separation cost and the like.

Description

technical field [0001] The invention relates to a process for separating light rare earths from southern ion-adsorption rare earth ores. Specifically, the aqueous solution of light rare earth chlorides obtained by group separation of southern ion-adsorption rare earth ores is used as a feed liquid, and P507 is used as an extraction agent to realize light rare earth elements lanthanum, Separation between the four elements of cerium, praseodymium and neodymium to obtain four products of 5N grade lanthanum chloride, 3N grade cerium chloride, 3N grade praseodymium chloride and 4N grade neodymium chloride. The specific technical field of the present invention is separation of light rare earth chloride by fractional distillation extraction. Background technique [0002] Although the southern ion-adsorption rare earth ore is the most important rare earth raw material for the separation and extraction of pure products of medium and heavy rare earth elements, the southern ion-adsorpt...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B59/00
CPCC22B59/00C22B3/3844Y02P10/20
Inventor 钟学明刘俊辰
Owner NANCHANG HANGKONG UNIVERSITY
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