| 简介 |
PROBLEM TO BE SOLVED : To provide an extractant which effectively extracts/separates a rare earth metal while minimizing a load on the environment, is extremely hardly soluble in water, can be completely incinerated, has superior extracting capability and selective separability both equivalent to an existing phosphorus-based compound (PC88A or D2EHPA), and is synthesized at a low cost, and to provide an extracting method using the same.
SOLUTION : The extractant to be used for extracting/separating the rare earth metal is a CHON type extractant having a skeleton of a diglycolamic acid expressed by a specified formula (extractant which is composed of only carbon, hydrogen, oxygen and nitrogen, and can be completely incinerated), and is extremely hardly soluble in water (for instance, dioctyldiglycolamic acid (DODGAA)).
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