Use of novel compounds for selectively extracting rare earths from aqueous solutions including phosphoric acid and associated extraction method
申请人:COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
公开号:US10450629B2
公开(公告)日:2019-10-22
The invention relates to the use, as an extraction agent for extracting at least one rare earth from an aqueous phase including phosphoric acid, of at least one compound of the following general formula (I):
where
n is an integer equal to 0, 1 or 2,
R1 and R2 are H or an aliphatic hydrocarbon group,
one of R3 and R4 has the following formula (II):
where R5 and R6 are a hydrocarbon, hydroxyl or alkoxyl group, and
the other one of R3 and R4 has one of the following formulas (II′) and (III):
where R5′ and R6′ are a hydrocarbon, hydroxyl or alkoxyl group, and R7 and R8 are H or an aliphatic hydrocarbon group.
The invention also relates to a method for recovering at least one rare earth using said compound, as well as to specific compounds as such.
本发明涉及至少一种通式 (I) 的化合物作为萃取剂,用于从包括磷酸在内的水相中萃取至少一种稀土:
其中
n 是等于 0、1 或 2 的整数、
R1 和 R2 是 H 或脂族烃基、
R3 和 R4 中的一个具有下式 (II):
其中 R5 和 R6 是烃基、羟基或烷氧基,以及
R3 和 R4 中的另一个具有下式 (II′) 和 (III) 之一:
其中 R5′和 R6′为烃基、羟基或烷氧基,R7 和 R8 为 H 或脂肪族烃基。
本发明还涉及使用上述化合物回收至少一种稀土的方法,以及此类特定化合物。