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1.用电导度法,电位法,郭子电迁移法,研究了Th(NO_3)_2-C_7-N_aOH-H_2O体系,确定钍与五棓子酸在PH<6时形成组份比为1:1的难溶化合物,PH>7时形成1:1的可溶性络合物。 2.从溶液中分离出了两种组份比为1:1的化合物(Ⅰ)或(Ⅰ′)及(Ⅱ)或(Ⅱ′),前者为一难溶于水,乙醇,乙醚,丙酮及苯的固体,但可溶于无机酸及过量碱中。后者为棕色无定形物质,溶于水呈橙红色,显微碱性,但不溶于乙醇,乙醚,丙酮及苯等有机溶剂中。钍在此化合物中以络阴离子形式存在,用(NH_4)_2C_2O_4,NaOH,及NaF不能自其水溶液中检出Th~(4+)。 3.提出了钍与五棓子酸相互作用的可能的反应式。
1. The system of Th (NO_3) _2-C_7-N_aOH-H_2O was studied by means of electrical conductivity, potentiometry and electrokinetic method. It was found that the ratio of thorium and pentachodonic acid was 1: 1 insoluble compounds, PH> 7 to form a 1: 1 soluble complex. 2. The two compounds (I) or (I ’) and (II) or (II’) are separated from the solution in a ratio of 1: 1, the former being a water-soluble, ethanol, And benzene solids, but soluble in mineral acids and excess base. The latter is a brown amorphous material, soluble in water, orange red, slightly alkaline, but not soluble in ethanol, ether, acetone and benzene and other organic solvents. Thorium exists as a complex anion in this compound. Th (4+) can not be detected from its aqueous solution with (NH_4) _2C_2O_4, NaOH, and NaF. Proposed a possible reaction of thorium with pentagolate acid.