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A kind of impurity removal recovery method of rare earth extraction emulsified organic phase

A recovery method and organic phase technology, applied in the field of hydrometallurgy, can solve the problems of high reaction temperature, high energy consumption, and high acidity of the organic phase, and achieve the effects of high removal rate, low energy consumption, and low reaction temperature

Active Publication Date: 2022-03-25
中稀(寿光)资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the prior art methods for removing impurities and recovering rare earth organic phases have the following defects: (1) The acidity of the organic phase after removing impurities is high and requires multiple washings with water; (2) The reaction temperature is high and energy consumption is high. (3) The removal rate of iron impurities is low

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  • A kind of impurity removal recovery method of rare earth extraction emulsified organic phase
  • A kind of impurity removal recovery method of rare earth extraction emulsified organic phase
  • A kind of impurity removal recovery method of rare earth extraction emulsified organic phase

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Embodiment 1

[0039] Example 1 A method for removing impurities and recovering the emulsified organic phase of rare earth extraction

[0040] A method for removing impurities and recovering rare earth extracted emulsified organic phases of the present invention comprises the steps of separation of organic phases, back extraction with hydrochloric acid, acid washing and water washing, specifically:

[0041] 1. Separation of organic phase (first organic phase):

[0042] Let the three phases stand for more than 48 hours to separate the solid and liquid naturally, and separate the organic phase (the first organic phase) for 8m 3 , into the reaction tank.

[0043] The three phases are emulsified three phases produced by the p507-hydrochloric acid-kerosene system due to the influence of non-rare earth metal ions and inorganic impurities in the rare earth extraction process.

[0044] The composition content of the organic phase (the first organic phase) is:

[0045] Organic phase (first organic...

Embodiment 2

[0066] Embodiment 2 A kind of impurity removal recovery method of rare earth extraction emulsified organic phase

[0067] The impurity removal and recovery method of a rare earth extraction emulsified organic phase in this embodiment includes the steps of separation of the organic phase, back extraction with hydrochloric acid, acid washing and water washing, specifically:

[0068] 1. Separation of organic phase (first organic phase):

[0069] Let the three phases stand for more than 48 hours to separate the organic phase (the first organic phase) 4.5m 3 , into the reaction tank.

[0070] The three phases are emulsified three phases produced by the p507-hydrochloric acid-kerosene system due to the influence of non-rare earth metal ions and inorganic impurities in the rare earth extraction process.

[0071] Organic phase (first organic phase) component content:

[0072]

[0073] 2. Hydrochloric acid stripping:

[0074] (1) will 0.5m 3 6N hydrochloric acid was added to th...

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Abstract

The invention provides a rare earth extraction and emulsified organic phase impurity removal and recovery method, which comprises organic phase separation, hydrochloric acid back extraction, acid washing and water washing. The hydrochloric acid stripping, 5-8N hydrochloric acid is added in the first organic phase, V 第一有机相 :V 酸 =4‑8:1, temperature 30‑40°C, let stand for 12 hours, recover the water phase, and obtain the second organic phase: the index of the second organic phase is Fe 2 o 3 0.118‑0.31g / l, Al 2 o 3 0-0.01g / l, Na 2 O 0g / l, load 1.2-2.1g / l, acid value 1.4-1.43mol / L, the impurity-removing recovery method of rare earth extraction emulsified organic phase of the present invention is to carry out further optimized treatment to the waste water that produces in the rare earth production process method, the rare earth wastewater treated by this method meets the industrial wastewater discharge standard required by the state, and the pollution-free whole treatment process belongs to clean treatment.

Description

technical field [0001] The invention relates to a method for removing impurities and recovering an emulsified organic phase by rare earth extraction, and relates to the technical field of hydrometallurgy. Background technique [0002] p-507, whose chemical name is 2-ethylhexyl phosphate mono-2-ethylhexyl ester, is a colorless or pale yellow transparent oily liquid. It is currently the extraction agent used in the extraction and separation of rare earths. Since the rare earth feed liquid contains Fe 3+ , Al 3+ , Ca 2+ ,Mg 2+ Such as impurity ions, impurities enriched for a long time, will form precipitation or cationic hydrolysis to produce hydroxide mixed with organic matter to form an emulsified three-phase, the organic phase will also form three-phase after long-term aging and degradation, and the three-phase will be enriched in the extraction tank It is difficult to eliminate by itself. If the emulsified three-phase is not treated for a long time, the extraction effic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B3/38
CPCC22B59/00C22B3/3846Y02P10/20
Inventor 孙国璐李常清郑理杰彭旭前
Owner 中稀(寿光)资源科技有限公司