Method for extracting rubidium salt from brine, and method for extracting cesium salt from brine

An extraction method and brine technology, which are applied in the extraction of cesium salts in brine, and the extraction of rubidium salts in brine, can solve the problems of inability to extract and separate rubidium salts and cesium salts.

Active Publication Date: 2015-02-04
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide an extraction method for rubidium salt in brine and an extraction method for cesium salt in brine to solve the prob

Method used

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  • Method for extracting rubidium salt from brine, and method for extracting cesium salt from brine
  • Method for extracting rubidium salt from brine, and method for extracting cesium salt from brine
  • Method for extracting rubidium salt from brine, and method for extracting cesium salt from brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The source of brine in this example is sodium sulfate subtype salt lake brine, and the mass fractions of some elements in its composition are as follows:

[0066]

[0067] The extraction method of rubidium salt and cesium salt in brine is as follows:

[0068] Ammonium bicarbonate modified zeolite was loaded into the ion exchange column, the aspect ratio of the ion exchange column was 38, and the flow rate was 0.8mL / min. Brine is introduced until the ammonium bicarbonate modified zeolite reaches the saturated adsorption capacity, and the adsorption rates of potassium, rubidium and cesium are 90.21%, 93.42% and 92.96% respectively. Subsequently, the ammonium bicarbonate modified zeolite is desorbed by using ammonium bicarbonate as a desorbent to obtain a first enrichment solution containing potassium, rubidium and cesium. Among them, the resolution rates of potassium, rubidium and cesium are 98.84%, 99.01% and 99.33%, respectively.

[0069] The first enrichment solut...

Embodiment 2

[0075] The source of brine in this embodiment is chloride type deep underground brine, and the mass fractions of some elements in its composition are as follows:

[0076]

[0077] The extraction method of rubidium salt and cesium salt in brine is as follows:

[0078] Ammonium bicarbonate modified zeolite was loaded into the ion exchange column, the aspect ratio of the ion exchange column was 20, and the flow rate was 0.5mL / min. Brine is introduced until the ammonium bicarbonate modified zeolite reaches the saturated adsorption capacity, and the adsorption rates of potassium, rubidium and cesium are 91.27%, 94.38% and 95.66% respectively. Subsequently, the ammonium bicarbonate modified zeolite is desorbed by using ammonium bicarbonate as a desorbent to obtain a first enrichment solution containing potassium, rubidium and cesium. Among them, the resolution rates of potassium, rubidium and cesium are 98.24%, 98.89% and 99.45%, respectively.

[0079] The first enrichment solu...

Embodiment 3

[0085] The brine source in the present embodiment is oil brine, and the mass fraction of some elements in its composition is as follows:

[0086]

[0087] The extraction method of rubidium salt and cesium salt in brine is as follows:

[0088] Ammonium bicarbonate modified zeolite was loaded into the ion exchange column, the aspect ratio of the ion exchange column was 50, and the flow rate was 2.5mL / min. Pass brine until the ammonium bicarbonate modified zeolite reaches the saturated adsorption capacity, and the adsorption rates of potassium, rubidium and cesium are 89.56%, 92.08% and 93.34% respectively. Subsequently, the ammonium bicarbonate modified zeolite is desorbed by using ammonium bicarbonate as a desorbent to obtain a first enrichment solution containing potassium, rubidium and cesium. Among them, the resolution rates of potassium, rubidium and cesium are 98.78%, 99.01% and 99.20%, respectively.

[0089]The first enrichment solution was evaporated and concentrate...

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Abstract

The invention discloses a method for extracting a cesium salt from brine. The cesium salt extraction method comprises the following steps: mixing the brine with an adsorbent, taking out the adsorbent after complete adsorption, and desorbing the adsorbent by adopting a desorption agent to obtain a first pregnant solution; carrying out evaporative concentration on the first pregnant solution, carrying out cooling crystallization, and separating to obtain a first crystal solid and a second pregnant solution; and adjusting the alkalinity of the second pregnant solution, carrying out fractioning extraction, separating to obtain a loaded organic phase and a raffinate, stripping the loaded organic phase by using a stripping agent to obtain a stripping solution which is a cesium salt solution. The invention also discloses a method for extracting a rubidium salt. Compared with traditional methods for extracting the rubidium salt and the cesium salt from the brine, the methods disclosed in the invention adopting adsorption enrichment, fractioning extraction and stripping to obtain the cesium salt solution and a rubidium salt solution have the advantages of simple process, effective extraction and separation of the rubidium salt and the cesium salt, and prevention of the loss of the rubidium salt and the cesium salt.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a method for extracting rubidium salt in brine and a method for extracting cesium salt in brine. Background technique [0002] Potassium, rubidium and cesium are three chemical properties and their active alkali metal elements, which have excellent photoelectric properties and have important uses in the fields of catalysts, photovoltaic cells, magnetic fluid power generation and medicine. Among them, both rubidium and cesium are rare elements, and my country's salt lake brine and deep brine are rich in rubidium and cesium resources, which are high-quality ore sources for extracting rubidium and cesium, which are much easier to use than solid minerals. For example, Chaerhan Salt Lake in Qinghai has a rubidium reserve of 38,000 tons (in terms of Rb 2 O) super-large rubidium ore; Tibet Zabuye Salt Lake rubidium reserves are 5838 tons (in terms of Rb 2 O), cesium reserves are 1652 to...

Claims

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Application Information

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IPC IPC(8): C01D17/00
Inventor 谭秀民张利珍张秀峰马亚梦李琦
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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