7815 extracting agent as germanium extracting additive and extracting method using said additive

Abstract

The 7815 extracting agent as germanium extracting additive consists of isopentyl alcohol and ethanol in the volume ratio of 3-20. The extracting process with the 7815 extracting agent includes: extracting with the extracting organic phase comprising the 7815 extracting agent and water insoluble diluent and extracting with extracting water phase containing acid medium of germanium to make most of germanium from the extracting water phase to the extracting organic phase; back extracting the organic phase carrying germanium with the counter-extracting water phase containing back extracting agent to make most of germanium from the organic phase to the water phase. Extracting germanium with the germanium extracting additive has the features of no emulsification and fast phase separating speed.

Description

(1) Technical field: [0001] The present invention relates to the additive of extractant, especially 7815 extractant—the extractive additive of germanium; the present invention also discloses the extraction method using the additive. (2) Background technology: [0002] Extractant 7815 is a hydroxamic acid synthesized by Beijing Institute of Chemical Metallurgy of Nuclear Industry. It has good extraction effect on germanium and is widely used in the extraction of germanium. However, due to its high viscosity and serious emulsification after extraction, certain extraction additives must be added during extraction to ensure the smooth progress of two-phase stratification and back-extraction. Zhuzhou Smelter and Kunming Metallurgical Research and Design Institute and other units selected P 204 -Naphthenic acid-fatty acid is the extraction additive of 7815 extractant, and B reagent is the back-extraction agent. The extraction of germanium in zinc leaching solution has been studie...

AI Technical Summary

Problems solved by technology

Although the above studies have the same extraction effect on germanium, the former can only be back-extracted with fluoride, and the kinetic speed in the back-extraction process is slow, the back-extraction equilibrium time takes 15 minutes, the phase separation is poor, and the germanium extraction rate is 95%. ; Although the latter has been improved, it can be back-extracted with fluoride or sodium hydroxide, but the equilibrium time of the back-extraction still needs 5 to 8 minutes, and the phase separation speed is still slow, and it takes more than 4 hours for the organic phase to be completely clarified. Rate 96%

Therefore adopt existing extraction additive to extract germanium, its extraction effect is still not good