Method for saponifying organic extracting agent

Abstract

The invention relates to a method for saponifying an organic extracting agent. One or more combination of P507, P204, P229, naphthenic acid and C301 is / are dissolved and diluted with alkane, kerosene and organic alcohol and then used as the organic extracting agent; BaCO3 or BaS aqueous solution is used as a saponifying agent for the organic extracting agent; hydrochloride or nitric acid extracting solution of rare-earth is used as rare-earth salt solution; and the rare-earth salt solution is converted into rare-earth saponified substance used for separating rare-earth metals by adopting single-stage saponification, co-flowing continuous saponification or reflux continuous saponification. The method has the advantages that the problem of external emission pollution of the extraction aqueous phase during rare-earth saponification is radically solved by adopting barium carbonate or barium sulfide as the saponifying agent for the organic extracting agent, meanwhile the acidity of the extracting agent is effectively utilized, and a barium chloride or sodium hydrosulfide product of senior industrial grade is obtained. The method is applicable in the rare-earth field of extracting the rare-earth metals by saponifying the extracting agent.

Description

technical field [0001] The invention relates to a saponification method of an organic extractant in the field of extraction and separation of rare earth metals. Background technique [0002] At present, the method for extracting rare earth metals from rare earth ores is as follows: 1. Firstly, the rare earth is reacted with acid or alkali to convert it into a rare earth salt that can be dissolved in water to make a rare earth aqueous solution. 2. The organic extractant used for rare earth metal extraction is subjected to saponification reaction with alkaline substances to generate organic soap. 3. React the rare earth aqueous solution with organic soap to form rare earth soap, and then extract rare earth elements. [0003] Rare earth salts are usually hydrochlorides, nitrates or sulfates of rare earths. [0004] The used alkaline substance of saponification reaction is ammonia water, sodium hydroxide or ammonium bicarbonate etc. as saponification agent. [0005] Commonly ...

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the deficiencies in the saponification method of the existing rare earth organic extractant, the present invention proposes a saponification method of the organic extractant