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Method for determining content of long-chain fatty alcohol in organic phosphonic acid solution

A long-chain fatty alcohol and organic phosphonic acid technology, which is applied in chemical analysis by titration, can solve the problems of distinguishing between alcohol hydroxyl groups and phosphonate groups, and cannot monitor the content of long-chain fatty alcohols in additives, achieving accuracy High, flexible and reliable method

Active Publication Date: 2017-12-15
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problems that the existing chromatographic analysis methods cannot simply and efficiently distinguish alcohol hydroxyl groups and phosphonate groups, and cannot monitor the content of long-chain fatty alcohols in additives, and provides a direct, simple and fast method for determining long-chain fatty alcohols in organic phosphonic acid solutions. The method for the content of chain fatty alcohols, which can realize the whole-process monitoring of the stability of the content of long-chain fatty alcohols in the organic phase of the organic phase in the whole process of rare earth separation. Online whole-process monitoring and control

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  • Method for determining content of long-chain fatty alcohol in organic phosphonic acid solution
  • Method for determining content of long-chain fatty alcohol in organic phosphonic acid solution

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Embodiment 1

[0040] Prepare a series of mixed organic solutions with different concentrations of isooctyl alcohol and di(2-ethylhexyl)phosphonic acid-mono-2-ethylhexyl ester, the specific conditions are as follows: di(2-ethylhexyl)phosphonic acid-mono The concentration of 2-ethylhexyl ester is 1.20mol / L, and the volume fraction is 40%; the volume fraction of isooctanol is 0%, 3%, 6%, 9%, 12%, and 15% respectively; the volume fraction of kerosene is respectively 60%, 57%, 54%, 51% The total concentration is 0.10mol / L, and the acidity is 0.80mol / L. Take 15mL of the above six organic phases and 15mL of the feed solution, mix them in a 60mL separatory funnel, and vibrate at 180rpm for 30 minutes at room temperature. After statically separating the phases, take the lower aqueous phase clear liquid, measure the rare earth concentration in the raffinate aqueous phase by the ethylenediaminetetraacetic acid disodium salt volumetric method, and then obtain the extracted rare earth concentration in ...

Embodiment 2

[0042] Prepare a series of mixed organic solutions with different concentrations of isooctyl alcohol and di(2-ethylhexyl)phosphonic acid-mono-2-ethylhexyl ester, the specific conditions are as follows: di(2-ethylhexyl)phosphonic acid-mono The concentration of 2-ethylhexyl ester is 1.35mol / L, and the volume fraction is 33%; the volume fraction of isooctanol is 0%, 3%, 6%, 9%, 12%, and 15% respectively; 67%, 64%, 61%, 58% The total concentration is 0.10mol / L, and the acidity is 0.80mol / L. Take 15mL of the above six organic phases and 15mL of the feed solution, mix them in a 60mL separatory funnel, and vibrate at 180rpm for 30 minutes at room temperature. After statically separating the phases, take the lower aqueous phase clear liquid, measure the rare earth concentration in the raffinate aqueous phase by the ethylenediaminetetraacetic acid disodium salt volumetric method, and then obtain the extracted rare earth concentration in the organic phase by subtraction method, and cal...

Embodiment 3

[0044] Prepare a series of mixed organic solutions of different concentrations of bis(2-ethylhexyl)phosphonic acid-mono-2-ethylhexyl ester and the same concentration of isooctyl alcohol, the specific conditions are as follows: bis(2-ethylhexyl)phosphonic acid-mono-2- The volume fractions of ethylhexyl ester are 30%, 33%, 35%, 37%, 41%, 45% respectively; the volume fractions of isooctyl alcohol are 10%; the volume fractions of kerosene are 60%, 57%, 55% respectively . Acidity 0.80mol / L. Take 15mL of the above six organic phases and 15mL of the feed solution, mix them in a 60mL separatory funnel, and vibrate at 180rpm for 30 minutes at room temperature. After statically separating the phases, take the lower aqueous phase clear liquid, measure the rare earth concentration in the raffinate aqueous phase by the ethylenediaminetetraacetic acid disodium salt volumetric method, and then obtain the extracted rare earth concentration in the organic phase by subtraction method, and calc...

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Abstract

The invention relates to a method for determining content of long-chain fatty alcohol in an organic phosphonic acid solution, and relates to the field of wet type metallurgy, which solves the technical problems of failure to simply and efficiently distinguish alcoholic hydroxyl group and phosphonate group and failure to monitor content of long-chain fatty alcohol in the additive in the existing chromatographic analysis method. The method has the advantages that by extracting the organic phase of an organic phosphate extracting agent, and quantitatively adding the long-chain fatty alcohol, the extracting property of the organic phosphonic acid extracting agent under different contents can be determined, the relationship among the extracting capacity, alcohol adding amount and organic phosphonic acid concentration is obtained, and the standard curve and equation are obtained; for the alcohol in the unknown system, the corresponding content of alcohol can be quantitatively obtained according to the extracting property by referring the standard curve and equation; the stability of the content of the long-chain fatty alcohol in the additive in the organic phase in the whole rare earth separation process can be monitored, the method is flexible and reliable, the accuracy is high, and the simple and rapid online monitoring, regulation and control can be truly realized.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a method for measuring the content of long-chain fatty alcohols in organic phosphonic acid solutions. Background technique [0002] In recent years, due to the heavy rare earth elements holmium (Ho), yttrium (Y), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) in laser media, radiation sources, scintillation crystals, magnetic materials, etc. It is widely used in key core materials in the field, and has shown an irreplaceable role in the fields of high technology and national defense. [0003] The world's heavy rare earth elements are relatively rare, and the main source is concentrated in ion-type mines in southern my country, with a content of less than 5%. The traditional bis(2-ethylhexyl)phosphonic acid-mono-2-ethylhexyl ester process cannot achieve complete stripping of these heavy rare earth strategic resources with absolute competitive advantages, which restricts t...

Claims

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Application Information

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IPC IPC(8): G01N31/16
Inventor 陈继陈厉李德谦邓岳锋李海连邹丹杨茂华刘川楹
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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