A method for measuring the content of long-chain fatty alcohol in organic phosphonic acid solution

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...

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