Extractant composition as well as preparation method and application thereof

• Main Authors: LU CHANGLI, LI YAN, CHAI SHENGYONG, KONG LEI, LI JIDE, CHEN LIN, LI KUNQUAN
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses an extractant composition as well as a preparation method and an application thereof. The composition comprises the following components in percentages by weight: a component A: 80-99.99wt% of dialkyl phosphinic acid with a structure shown in a formula I; a component B: 0-5wt% of dialkyl phosphinic acid with a structure shown in a formula II; a component C: 0-5wt% of dialkyl phosphinic acid alkyl ester with a structure shown in a formula III; a component D: 0-10wt% of alkyl phosphorous acid mono alkyl ester with a structure shown in a formula IV; wherein, the component B, C and D are not zero at the same time, and the sum of the component A, B, C and D is always 100wt%. The extractant composition containing synergistic extractant components is prepared, the composition is used as an extractant and can be widely applied to rare earth metals, especially separation and purification of cobalt nickel bimetals, and compared with monocomponent extraction agents, the composition has more excel