Phosphonamides, process for producing the same, and use thereof

Details Phosphonamides, process for producing the same, and use thereof Phosphonamides, process for producing the same, and use thereof

2003-03-03

2010-11-09

Havlin, Robert (Department: 1626)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Rare earth metal

C548S100000

Reexamination Certificate

active

07829044

ABSTRACT:
The invention provides a process by which rare earth metal ions can be efficiently extracted by easy operation, and effective extracting reagents for the process. Specifically, phosphonamides represented by the general formula [1]; a process for producing the same; reagents for extracting rare earth metal ions, containing the phosphonamides; and a process for extraction of rare earth metal ions with the phosphonamides: [1] wherein R1is alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, aralkyl, or a heterocyclic group, with the proviso that each group may be substituted; R2is hydrogen, alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl, aralkyl, or a heterocyclic group, with the proviso that each group may be substituted; R3is hydrogen, alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl, aralkyl, or a heterocyclic group, with the proviso that each group may be substituted, or the two R3s may be united to form alkylene, cycloalkylene, or arylene.

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