Question

Which method is used for purification of mercury? ​

Answer 1

Mercury is purified with regard to iron, calcium and similar metallic impurities by contacting the mercury with "nascent" chlorine and with an aqueous phase capable of generating nascent chlorine. The contact step may be carried out, for example, by electrolyzing a chloride brine which is in contact with the mercury; or by washing the mercury with a mineral acid and the metal salt of an oxychloride acid. Impurity metal values are solubilized into the aqueous phase which is separated from the mercury. The process generally involves only two steps (i.e., contacting and separating), is easy to perform, and can be carried out within a relatively few minutes.

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