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Extraction method of rubidium

An extraction method and extraction technology are applied in the extraction field of rubidium, which can solve the problem that there is no one better occurrence form, and achieve the effects of short reaction time and improved leaching rate.

Inactive Publication Date: 2013-04-17
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the extraction methods of rubidium mainly include: fractional crystallization, precipitation, ion exchange, solvent extraction and other rubidium extraction processes. Most of these rubidium extraction methods are from brine with high rubidium content, rubidium-containing lepidolite or Rubidium is extracted from cesium garnet, and there is no better method for rubidium-containing feldspar with a wide range of occurrence forms and large reserves

Method used

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  • Extraction method of rubidium

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Effect test

Embodiment 1

[0033] Take 100g of mineral sample and 500ml of 120g / L NaOH solution to adjust the slurry, and then add it to the pressurized reaction kettle, the temperature is 160℃, and the time is 1h. After leaching and filtering, the filter residue can be used as cement raw material. The filtrate contains Rb 0.342g / L, and the leaching rate of rubidium reaches 84.79%. The above-mentioned filtrate was subjected to solvent extraction, the extractant was t-BAMBP and the amount of xylene was 1:2, the extraction ratio (O / A) was 3:1, the extraction time was 3min, and the number of extraction stages was 3, and the resulting Rb load The organic phase contains Rb 0.21g / L; the extraction rate is 92.23%. The Rb-loaded organic phase is back-extracted with HCl to obtain the RbCl solution; the back-extraction acid concentration is 2mol / L, the back-extraction time is 3 minutes, the number of back-extraction stages is 3, and the back-extraction ratio (O / A) is 7:1 . The water phase composition after strip...

Embodiment 2

[0035] Take 100g of 160-mesh ore sample and 500ml of 160g / L NaOH solution to adjust the slurry, and then add it to the pressurized reactor at a temperature of 180℃ and a time of 3h. After leaching and filtering, the filter residue can be used as cement raw material. The filtrate contains Rb 0.356g / L, and the leaching rate of rubidium reaches 86.7%. Solvent extraction of the above-mentioned filtrate, the extractant is t-BAMBP and the amount of xylene is 1:2, the extraction ratio (O / A) is 7:1, the extraction time is 5min, the number of extraction stages is 5, and the Rb load is obtained The organic phase contained 0.81g / L of Rb after washing, and the extraction rate was 99.3%. After washing, the organic phase loaded with Rb is back-extracted with HCl to obtain the RbCl solution; the concentration of the back-extraction acid is 5mol / L, the back-extraction time is 8min, the number of back-extraction stages is 5, and the back-extraction ratio (O / A) is 3 :1. The water phase composi...

Embodiment 3

[0037] Take 100g of the 260 mesh sample and 500ml NaOH+Na 2 CO 3 Mixed solution (NaOH and Na 2 CO 3 The mass ratio is 1:1), and the solution with a concentration of 180g / L is slurried, and then added to the pressurized reactor at a temperature of 180°C and a time of 4h. After leaching and filtering, the filter residue can be used as cement raw material. The filtrate contains Rb 0.369g / L, and the leaching rate of rubidium reaches 91.02%. The above-mentioned filtrate was subjected to solvent extraction, the extractant was t-BAMBP and the amount of xylene was 1:2, the extraction ratio (O / A) was 1:1, the extraction time was 2min, and the number of extraction stages was 7, and the resulting Rb load The organic phase contains Rb 0.645g / L, and the extraction rate is 99.3%. The Rb-loaded organic phase is back-extracted with HCl to obtain the RbCl solution; the back-extraction acid concentration is 4mol / L, the back-extraction time is 5min, the number of back-extraction stages is 7, and ...

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Abstract

The invention discloses an extraction method of rubidium, which comprises the steps of raw material treatment, alkali leaching, extraction and back extraction. The method specifically comprises the following steps: taking the raw material rubidium-containing feldspar, and pulverizing for later use; adding an alkaline solution of which the liquid-to-solid ratio is 1-6 into the treated raw material, mixing, and adding the mixture into a pressurized reaction kettle to carry out reaction to form a slurry, and filtering, wherein the filter residue is used as the raw material for producing cement, and the filtrate is for later use; adding an extractant t-BAMBP of which the volume ratio is 1-5 into the filtrate to carry out extraction, thereby obtaining a rubidium-carried organic phase; and adding HCl of which the volume ratio is 1-8 into the rubidium-carried organic phase to carry out back extraction, thereby obtaining rubidium chloride. By carrying out alkaline leaching on the raw material rubidium-containing feldspar in the pressurized reaction kettle, the invention can obviously enhance the leaching rate of rubidium (up to higher than 98%), has the advantage of short reaction time (min 0.5 hour), and provides conditions for comprehensive utilization of rubidium-containing feldspar.

Description

Technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting, and specifically relates to a method for extracting rubidium. Background technique [0002] Rubidium is an extremely important resource of rare precious metals, which has important economic and strategic significance. It has important applications in traditional fields such as electronic devices, photovoltaic cells, catalysts, special glass, biochemistry and medicine, and in some high-tech fields, such as magnetic fluid power generation, thermionic conversion power generation, ion propulsion rockets, laser conversion electric energy Devices and other aspects have also shown an increasingly important role. In particular, thermoelectric transducers made of rubidium can realize thermionic thermonuclear power generation inside the reactor if it is used in conjunction with an atomic reactor. [0003] Today, when various resources are relatively scarce in the world, rubidium, as a metal w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/26C22B26/10
CPCY02P10/20
Inventor 杨大锦廖元双彭秋燕刘俊场付维琴
Owner KUNMING METALLURGY INST
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