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Method for preparation cesium sulfate from salt-containing wastewater

A technology of saline wastewater and cesium sulfate, which is applied in the direction of improving process efficiency, etc., can solve the problems that the separation effect cannot be achieved, BAMBP cannot be mass-produced, and the price is high.

Active Publication Date: 2019-03-29
GREENNOVO ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the system of separating rubidium and cesium by solvent extraction, BAMBP has the best performance, but BAMBP cannot be mass-produced in China, and the price is high, resulting in high cost of separation of rubidium and cesium, and the recovery rate cannot reach a high level
[0005] The invention patent with the publication number CN107254589A discloses a method for separating and extracting rubidium and cesium in salt lake brine by t-BAMBP extraction method. At the same time, high acid is used for washing in the washing section, which will cause cesium in the loaded organic phase to enter the washing liquid, resulting in rubidium, cesium, and potassium in the washing liquid at the same time, which cannot achieve the separation effect, let alone enrich cesium. Purification, not suitable for industrial production

Method used

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  • Method for preparation cesium sulfate from salt-containing wastewater
  • Method for preparation cesium sulfate from salt-containing wastewater
  • Method for preparation cesium sulfate from salt-containing wastewater

Examples

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Embodiment 1

[0030] Such as figure 1 Shown, a method for preparing cesium sulfate in saline waste water, comprises the following steps:

[0031] The first step, prepare extractant, take t-BAMBP, P 204 and kerosene, the t-BAMBP, P 204 Mixed with kerosene to obtain extractant;

[0032] The second step is to detect the ion concentration of the feed liquid, and detect the Cs in the saline wastewater by atomic absorption spectrometry + , Rb + 、K + and Na + concentration;

[0033] The third step is to take the saline wastewater to adjust the pH, and use alkaline substances to adjust the pH value of the saline wastewater to obtain the feed liquid;

[0034] In the fourth step, the post-extractant is subjected to multi-stage countercurrent extraction of the feed liquid to obtain a loaded organic phase;

[0035] In the fifth step, the loaded organic phase is circulated and countercurrently washed with the washing liquid to obtain the loaded organic phase after washing;

[0036] The 6th step...

Embodiment 2

[0041] A method for preparing cesium sulfate in saline waste water, comprising the following steps:

[0042] The first step, prepare extractant, take t-BAMBP, P 204 and kerosene, the t-BAMBP, P 204 Mix with kerosene to obtain extractant, t-BAMBP is 15 parts by weight, P 204 5 parts for kerosene and 75 parts for kerosene;

[0043] The second step is to detect the ion concentration of the feed liquid, and detect the Cs in the saline wastewater by atomic absorption spectrometry + , Rb + 、K + and Na + Concentration, Cs + The concentration is 0.1g / L, Rb + The concentration is 0.2g / L, K + The concentration is 25g / L, Na + The concentration is 30g / L;

[0044] The third step is to take the saline wastewater to adjust the pH, and use alkaline substances to adjust the pH value of the saline wastewater to obtain a feed liquid, wherein the alkaline substances are sodium carbonate, sodium hydroxide, and liquid caustic soda, and the pH is adjusted to > 13. The addition method inclu...

Embodiment 3

[0052] A method for preparing cesium sulfate in saline waste water, comprising the following steps:

[0053] The first step, prepare extractant, take t-BAMBP, P 204 and kerosene, the t-BAMBP, P 204 Mix with kerosene to obtain extractant, t-BAMBP is 20 parts by weight, P 204 5 parts for kerosene and 80 parts for kerosene;

[0054] The second step is to detect the ion concentration of the feed liquid, and detect the Cs in the saline wastewater by atomic absorption spectrometry + , Rb + 、K + 、Na + Concentration, Cs + The concentration is 1.2g / L, Rb + The concentration is 1.2g / L, K + The concentration is 45g / L, Na + The concentration is 80g / L;

[0055] The third step is to take the saline wastewater to adjust the pH, and use alkaline substances to adjust the pH value of the saline wastewater to obtain a feed liquid, wherein the alkaline substances are sodium carbonate, sodium hydroxide, and liquid caustic soda, and the pH is adjusted to > 13. The addition method includes...

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Abstract

The invention relates to the field of recovering high-value products from industrial waste, in particular to a method for preparing cesium sulfate from salt-containing wastewater. The method comprisesthe following steps that firstly, an extraction agent is prepared, t-BAMBP, P204 and kerosene are taken, and the t-BAMBP, the P204 and the kerosene are mixed to prepare the extraction agent; then theconcentration of material liquid ions is detected, then the salt-containing wastewater is taken for adjusting the PH value, and then multistage countercurrent extraction is carried out on the material liquid by using the extraction agent so as to prepare a load organic phase; then circulation countercurrent washing is carried out on the load organic phase by using a water washing solution, then aback-extraction agent is prepared, and then back extraction is carried out; and finally evaporation is carried out to prepare the cesium sulfate. Thus, the effect that cesium elements are separated and extracted from the salt-containing wastewater is achieved, and a method for extracting the cesium in the salt-containing wastewater which is based on the synergism of the t-BAMBP and the P204 underan alkaline condition is provided by utilizing the alkalescence of the salt-containing wastewater.

Description

technical field [0001] The invention relates to the field of recycling high-value products from industrial waste, in particular to a method for preparing cesium sulfate from saline wastewater. Background technique [0002] As important scarce alkali metal resources, rubidium and cesium are widely used in the fields of industrial catalysis, medicine and special glass. The existing methods for separating rubidium and cesium mostly use distributed precipitation, fractional crystallization, ion exchange and solvent extraction, while In order to obtain high-quality rubidium and cesium, solvent extraction is often used. [0003] In the field of comprehensive recovery of solid and hazardous waste, during the washing process of high chlorine-containing materials, rubidium and cesium elements are contained in the produced saline wastewater. In the process of washing chlorine-containing materials, in order to improve the chlorine washing effect, caustic soda, soda ash, etc. Sexual au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/10C22B7/00C22B3/40
CPCC22B7/006C22B26/10C22B3/409Y02P10/20
Inventor 马黎阳李春林白如斌魏希勇李云海张云学林琳
Owner GREENNOVO ENVIRONMENTAL TECH CO LTD
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