Oxidation of ethyl xanthate on platinum, gold, copper, and galena electrodes. Relation to the mechanism of mineral flotation
Oxidation of ethyl xanthate on platinum, gold, copper, and galena electrodes. Relation to the mechanism of mineral flotation
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DOI：
10.1021/j100673a011
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发表时间：
1971-02
期刊：
影响因子：
--
通讯作者：
R. Woods
中科院分区：
文献类型：
--
作者：
R. Woods
乙基黄原酸盐在铂、金、铜和方铅矿电极上阳极氧化生成二乙基二黄原酸盐的电化学研究表明，氧化是通过吸附的黄原酸根进行的。吸附步骤可以从方铅矿上的整体反应单独研究，并发现服从Elovich吸附动力学。双黄原酸不被化学吸附，而是在电极表面形成多层膜。氧化伴随着电极表面从亲水性到疏水性条件的变化。认为黄药捕收剂浮选矿物是通过黄药的电氧化、氧的氧化提供阴极过程进行的。
Electrochemical investigations of the anodic oxidation of ethyl xanthate to diethyl dixanthogen on platinum, gold, copper, and galena electrodes show that the oxidation proceeds through an adsorbed xanthate radical. The adsorption step can be studied separately from the overall reaction on galena and is foundto obey Elovich adsorption kinetics. The dixanthogen is not chemisorbed but builds upto multilayers on the electrode sur-face. The oxidation is accompanied by a change in thesurface of the electrodes from a hydrophilic to a hydro-phobic condition. It is concluded that mineral flotationwith xanthate collectorsproceeds through the electrooxidation of xanthate, oxygen hying required to provide a cathodic process.