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本文研究α-噻吩甲酰三氟丙酮(HTTA)、1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮(HPMBP)与四苯基砷氯(C_6H_5)_4AsCl的氯仿溶液从高氯酸中萃取U(VI).该体系属螯合、离子缔合AAC类,其二元及三元协萃平衡常数分别为:logβ_(A_1C)=3.97[HTTA-(C_6H_5)_4AsCl];logβ_(A_2C)=4.86[HPMBP-(C_6H_5)_4AsCl];logβ_(A_1A_2C)=5.52[HTTA-PMBP-(C_6H_5)_4AsCl].用亚甲基蓝光度法测定了萃合物中ClO_4~-的存在,用斜率法确定二元协萃物组成为(C_6H_5)_4As~+[UO_2(ClO_4)(TTA)_2]~-和(C_6H_5)_4As~+[UO_2(ClO_4)(PMBP)_2]~-,三元协萃配合物为(C_6H_5)_4As~+[UO_2(ClO_4)(TTA)(PMBP)]~-.
In this paper, the effects of α-butanoyltrifluoroacetone (HTTA), 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) and tetraphenyls arsenic chloride (C_6H_5) _4AsCl (VI) was extracted from perchloric acid by a chloroform solution, which belongs to the class of chelating and ionic association AAC. The equilibrium constants of binary and ternary cocultivation are log β_ (A_1C) = 3.97 [HTTA- (C_6H_5) (A_2C) = 4.86 [HPMBP- (C_6H_5) _4AsCl]; logβ_ (A_1A_2C) = 5.52 [HTTA-PMBP- (C_6H_5) _4AsCl] .The methylene blue photometric method was used to determine the presence of ClO_4 ~ (C_6H_5) _4As ~ + [UO_2 (ClO_4) (TTA) _2] ~ - and (C_6H_5) _4As ~ + [UO_2 (ClO_4) (PMBP) _2] The ternary compound complex is (C_6H_5) _4As ~ + [UO_2 (ClO_4) (TTA) (PMBP)] ~ -.