US 2020/0024151 A1 · METHOD OF EXTRACTING AND SEPARATING ZIRCONIUM AND HAFNIUM FROM HYDROCHLORIC ACID MEDIUM

Abstract

Provided is a method of extracting and separating zirconium and hafnium from hydrochloric acid medium, which relates to the technical field of fine separation of substance. Primarily, extraction is performed to acidic raw liquid containing zirconium compounds by a synergistic extraction system consisting of DIBK and phosphonic acids extraction agent, so that the zirconium goes to the aqueous phase and the hafnium goes to the organic phase, thus the separation is achieved. No toxic substance is involved throughout the process, so clean production is achieved.

Claims20

Dependent claims

A method of extracting and separating zirconium and hafnium from hydrochloric acid medium, comprising following steps:

mixing an extraction agent with acidic raw liquid for extraction, with the acidic raw liquid formed by mixing a zirconium-containing chemical and hydrochloric acid;
mixing obtained raffinate from phase separation of the extraction with a base solution to give zirconium hydroxide precipitate;
stripping hafnium-containing loaded organic phase with a carbonate solution;
mixing stripping liquid with a base solution to give hafnium hydroxide precipitate, and roasting the zirconium hydroxide precipitate and the hafnium hydroxide precipitate, wherein the extraction agent comprises mixture consisted of diisobutyl ketone (DIBK) and phosphonic acids extraction agent.

1 more element

Dependencies are inferred from the claim text.

Method of extracting and separating zirconium and hafnium from hydrochloric acid medium

Life of this patent

Method of extracting and separating zirconium and hafnium from hydrochloric acid medium

Life of this patent

Abstract

Claims20