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Method for Extracting Rubidium from Salt Lake Brine

A salt lake brine and extraction technology, which is applied in the direction of improving process efficiency to achieve the effect of improving extraction efficiency

Active Publication Date: 2017-12-26
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the mass concentration of potassium, the extraction process of high potassium content brine in the range of 800-3000 of rubidium mass concentration has not been reported so far

Method used

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  • Method for Extracting Rubidium from Salt Lake Brine
  • Method for Extracting Rubidium from Salt Lake Brine
  • Method for Extracting Rubidium from Salt Lake Brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Dissolve 98g of anhydrous sodium carbonate in 350mL of distilled water, slowly add to 1L of salt lake brine sample (magnesium content is 21.98g / L), stir for 10min, filter, and collect filtrate A and filter cake A respectively.

[0046] Weigh 25 g of anhydrous sodium carbonate and dissolve it in 88 mL of distilled water, slowly add it to filtrate 1, stir for 10 min, filter, and collect the first filtrate and filter cake B respectively. The content of magnesium in the collected first filtrate was 43mg / L.

[0047] The first and second precipitated filter cakes A and B were combined into the first filter cake, dried and heated in a muffle furnace at 800°C for 40 minutes, with a total weight of 180.7g. After taking it out and cooling it, add 180mL distilled water to wash once, filter, and collect filtrate C and filter cake C respectively.

[0048] Add 180 mL of distilled water to the filter cake C to wash it twice, filter, and collect the filtrate D and filter cake D respect...

Embodiment 2

[0056] The operating steps of the present embodiment are similar to those of Example 1, and the process parameters are as shown in Table 2:

[0057] The process parameter and result thereof of table 2 embodiment 2

[0058]

Embodiment 3

[0060] The operating steps of the present embodiment are similar to those of Example 1, and the process parameters are as shown in Table 3:

[0061] The process parameter and the result thereof of table 3 embodiment 3

[0062]

[0063]

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Abstract

The invention provides a method for extracting rubidium from saline lake brine. The method comprises the following steps: (1) adding water-soluble carbonate precipitated magnesium ions into the saline lake brine, carrying out solid-liquid separation to obtain a first filtrate and a second filtrated cake, and enabling the content of magnesium ions in the first filtrate to be lower than 50mg / L; (2) extracting rubidium from the first filtrate by using 4-tert-butyl-2-(alpha-methylbenzyl) phenol as an extractant and using an extraction-backextraction alternate countercurrent extraction process in an environment that the amount-of-substance concentration of [OH-] is 0.8-1mol / L, wherein the concentration of 4-tert-butyl-2-(alpha-methylbenzyl) phenol in the extractant is 0.5-1mol / L. According to the method, rubidium is effectively obtained from brine with high concentration of potassium, and the efficiency of rubidium extraction is increased.

Description

technical field [0001] The invention relates to the extraction technology of salt lake, especially the extraction of rubidium element in salt lake. Background technique [0002] The price of rubidium ore has risen due to the emergence of the worldwide energy crisis, the increase in demand for rubidium products, and the large regional differences in the distribution of rubidium ore resources. The production cost of extracting rubidium from solid ore is very high. Salt lake brine is rich in rubidium resources, but so far the development and utilization is still blank. The investigation data of salt lake rubidium resources are few and outdated. The research on the method of extracting rubidium from salt lake brine has not been systematically reported. There is no precedent for rubidium resources in the Salt Lake area. [0003] With the continuous development of salt lake resources in Qinghai, the comprehensive utilization of salt lake resources has attracted more and more atte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/10C22B3/26
CPCY02P10/20
Inventor 郑红尤志刚段东平李波王舒娅邹兴武
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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