Method for separating arsenic and heavy metals in an acidic washing solution
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United States of America Patent
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Jan 31, 2017
Grant Date -
Nov 20, 2014
app pub date -
Oct 26, 2012
filing date -
Dec 20, 2011
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Abstract
A method for separating arsenic and heavy metals in an acidic washing solution which contains both arsenic and heavy metal, more particularly in a washing solution which is formed in copper smelting and contains sulphuric acid, comprises a separation process section, in which arsenic and at least one primary heavy metal are separated from one another. The separation process section comprises a processing step, in which hydrogen peroxide H2O2 is added to the washing solution, and the separation process section comprises a precipitation stage, in which the washing solution is admixed with a sulphide precipitation reagent, causing the at least one primary heavy metal to precipitate in the form of a metal sulphide. The processing step in this system is carried out before the precipitation stage.
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