JPS6050128A - Extracting method of iron (iii)
PURPOSE: To extract easily and efficiently iron ion by using an extracting solvent contg. the org. phosphinic acid expressed by the specific general formula as an extracting agent for extracting the iron ion from an aq. soln. CONSTITUTION: The extracting solvent contg. org. phosphinic acid expressed by the formula (R 1, R 2 are C 1W20 alkyl; the sum of the C atom of R 1, R 2 is 12W36, R 1