| http://www.w3.org/ns/prov#value | - After the treatment with carbon bisulphide the final xanthates may be purified or-isolated from the reaction masses, for example, by (optionally after neutralising them with a weak acid, for example acetic acid) precipitating with an alcohol, such as methylor ethyl-alcohol, or with a solu-- tion of a salt, such as sodium chloride or an ammonium salt or the like or with carbon dioxide or with sulph
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