Huang, Chunhui published the artcileThe extraction of lanthanides with halogen substituted 4-acylpyrazolones, HPLC of Formula: 1691-93-6, the main research area is lanthanide extraction acylpyrazolone halogen derivative.
Equilibrium extraction behavior for a series of representative tervalent lanthanide ions, La, Pr, Eu, and Yb, using chloroform solutions containing halogenated derivatives of 4-acyl-1-phenyl-3-methyl-5-pyrazolone were studied. These lanthanides are extracted as simple chelates, LnL3. The equilibrium constants of these extraction reactions were calculated The relationships between the acid dissociation constants, Ka, determined by a 2-phase titration method, distribution constants, KDR, and the extraction equilibrium constants, Kex, are discussed.
Solvent Extraction and Ion Exchange published new progress about Extraction. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, HPLC of Formula: 1691-93-6.
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics