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Method and system for extracting rubidium salt and cesium salt from mother liquor after extracting lithium from lepidolite

A technology for extracting lithium mother liquor and lepidolite, applied in chemical instruments and methods, rubidium/cesium/francium compounds, alkali metal compounds, etc., can solve problems such as difficult operation control, reduce impurities, improve metal recovery rate, The effect of high separation coefficient

Inactive Publication Date: 2017-02-08
JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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Problems solved by technology

Therefore, the operation control of CN103787375A is not easy to grasp

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  • Method and system for extracting rubidium salt and cesium salt from mother liquor after extracting lithium from lepidolite

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Embodiment Construction

[0047] like figure 1 As shown, the system for extracting rubidium salt and cesium salt from lepidolite extracting lithium mother liquor according to the present invention comprises a pH value adjustment container 10, which is provided with a pH value adjustment agent adder 11, a pH value controller 12; extractor 20, It has lithium mica extraction mother liquor inlet 21, organic extractant additive 22, load organic phase I outlet 23, and raffinate outlet 24, extractor 20 can be made of PVC material; The organic extractant that adopts is p-xylene organic matter All contain potassium-sodium mixture in the raffinate; Scrubber 30, it has organic phase I inlet 31, water injection port 32, organic phase II outlet 33 and washing liquid discharge port 34; The first stripper 40, it has Loaded organic phase II inlet 41, stripping acid I inlet 42, rubidium salt stripping solution outlet 43, and organic phase outlet 44 of loaded cesium ions; the second stripper 50 has an organic phase inle...

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Abstract

The invention provides a method for extracting rubidium salt and cesium salt from mother liquor after extracting lithium from lepidolite, which is characterized by comprising the following steps: 1) adjusting a high salinity solution into an alkaline solution; 2) extracting rubidium ions and caesium ions in the alkaline solution obtained in the step 1) by adopting an organic extractant, so as to obtain a loaded organic phase I and raffinate; 3) washing the organic phase I obtained in the step 2), so as to obtain an organic phase II and washing liquor; 4) carrying out back extraction on the loaded organic phase II with back extraction acid I, so as to obtain rubidium salt back extraction liquor and a cesium ion-loaded organic phase; and 5) carrying out back extraction on the cesium ion-loaded organic phase obtained in the step 4) with back extraction acid II, so as to obtain cesium salt back extraction liquor and a blank organic phase. According to the invention, the mother liquor after extracting lithium from lepidolite is controlled to be a strong alkali state, and the solution after back extraction has relatively low impurity content, so that the separation coefficient is high. According to the invention, the mother liquor after extracting lithium from lepidolite is controlled to be a strong alkali state, and the extraction becomes complete, so that the recovery rate is high.

Description

[0001] This application is a divisional application, and the filing date of the parent case is May 19, 2015; the application number of the parent case is 201510255821.4; Methods and Systems". technical field [0002] The invention relates to a method and a system for extracting rubidium salt and cesium salt from mother liquor after extracting lithium from lepidolite, belonging to the technical field of metallurgy. [0003] The invention can cooperate with the comprehensive development and utilization of high-salinity media, and is applied to produce a predetermined type of rubidium salt (rubidium carbonate, rubidium sulfate, etc.) and cesium salt (cesium carbonate, cesium sulfate, etc.) products. Background technique [0004] In the prior art, the process flow for extracting rubidium salts (rubidium carbonate, rubidium sulfate, etc.) and cesium salts (cesium carbonate, cesium sulfate, etc.) from the mother liquor after lepidolite lithium extraction is: [0005] Mother liquo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D17/00
CPCC01D17/00
Inventor 戴正文
Owner JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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