Sugiura, Masaaki published the artcileEffect of quaternary ammonium salts on carrier-mediated transport of lanthanide ions through cellulose triacetate membranes, Category: pyrazoles-derivatives, the main research area is lanthanide membrane transport quaternary ammonium; acetate cellulose membrane lanthanide transport; lanthanum transport cellulose acetate membrane; cerium transport cellulose acetate membrane; benzoylmethylphenylpyrazolone carrier membrane transport lanthanide; tfluoroacetylmethylphenylpyrazolone carrier membrane transport lanthanide; plasticizer quaternary ammonium salt membrane; nitrophenyloctyl ether plasticizer membrane.
Fluxes of all lanthanides, except Pm, across cellulose triacetate membranes were determined by using mixtures of o-nitrophenyl n-octyl ether and quaternary ammonium salts as plasticizers, and 4-benzoyl-3-methyl-1-phenyl-5-pyrazolone (I) and 4-trifluoroacetyl-3-methyl-1-phenyl-5-pyrazolone (II) as carriers. The quaternary ammonium salts used were didodecyldimethyl-, distearyldimethyl-, tetrahexyl-, tetraoctyl-, and tetradecylammonium bromides [referred to as (C12)2NBr, (C18)2NBr, (C6)4NBr, (C8)4NBr, and (C10)4NBr, resp.]. The effect of these quaternary ammonium bromides on the flux was demonstrated. For membranes containing 0.1 M (C12)2NBr and (C18)2NBr, I exhibited considerably high fluxes. The fluxes of La and Ce using I for (C12)2NBr were higher than those of the other lanthanides. For the membranes containing 0.5 M (C12)2NBr and 0.1 M (C18)2NBr, however, no difference in flux among the lanthanides was observed The fluxes using II for (C12)2NBr and (C18)2NBr were very small, with the exception of some lanthanides. Appreciably high fluxes were observed for membranes containing 0.1 M (C6)4NBr using I. For (C8)4NBr and (C10)4NBr, I exhibited low fluxes. For these membranes using II, the lanthanides were scarcely transported.
Separation Science and Technology published new progress about Plasticizers. 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, Category: pyrazoles-derivatives.
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Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics