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Some additional aspects of gold (III) extraction by dibutyl carbitol

机译：二丁基卡必醇提取金（III）的其他方面

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From changes of volumes of the aqueous and organic phases it was found that the extraction of HAuCl_4 from hydrochloric medium by dibutyl carbitol (DBC) involves co-extraction of about 6 mol of water per one mole of gold(III). The changes of phase volumes are equal to ΔV_(org)=0.17 n_(Au), ΔV_(aq) = - 0.20 n_(Au), where n_(Au) is the number of moles of gold(III) extracted. Distribution coefficients have been obtained for C_(Au) org= 10~(-6)-1.25 M, C_(HCl) = 1 M and for some other conditions. The electro-conductivity of extracts and solutions of HAuCl4 - 3.3H_2O in dry DBC has been measured. In the organic phase the contribution of the ionic subsystem increases with the concentration of gold(III) and at high C_(Au) org exceeds 50%. A set of species in the organic phase H~+, AuCl_4 , HAuCl_4, (HAuCl_4)_2. H(AuCl_4)_2~-, and H_2(AuCl_4)~+ containing molecules of DBC and water, is sufficient to adequately explain the exper imental data on distribution and electro-conductivity of extracts. However, it is necessary to take into account medium effects, which were simulated using simple models by Born and Debye. It has been shown that for this system the method based on the correspondence of the organic phases (equality of C_(Au) org) gives satisfactory results in recalculating data from 1 M to other C_(HCl)
机译：从水相和有机相的体积变化中发现，二丁基卡必醇（DBC）从盐酸介质中萃取HAuCl_4涉及每1摩尔金（III）共萃取约6摩尔水。相体积的变化等于ΔV_（org）= 0.17 n_（Au），ΔV_（aq）=-0.20 n_（Au），其中n_（Au）是提取的金（III）的摩尔数。对于C_（Au）org = 10〜（-6）-1.25 M，C_（HCl）= 1 M和其他一些条件，已经获得了分配系数。测量了干燥DBC中HAuCl4-3.3H_2O的提取物和溶液的电导率。在有机相中，离子子系统的贡献随着金（III）的浓度而增加，并且在高C_（Au）org时超过50％。有机相H〜+，AuCl_4，HAuCl_4，（HAuCl_4）_2中的一组物种。 H（AuCl_4）_2〜-和H_2（AuCl_4）〜+含有DBC和水的分子，足以充分解释提取物的分布和电导率的实验数据。但是，有必要考虑使用Born和Debye使用简单模型模拟的中等效果。结果表明，对于该系统，基于有机相的对应性（C_（Au）org的相等性）的方法在将数据从1 M重新计算为其他C_（HCl）时给出了令人满意的结果。

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