Improvements in or relating to flotation agents for use in concentrating minerals

摘要

Oils for use in concentrating ores by flotation are obtained by treating coal tar or coal-tar oil containing tar acids with chloride of sulphur, or by treating coal-tar acids with chloride of sulphur and mixing the product with coal tar or coal-tar oils. For example, coaltar oils such as creosote or creosote oils containing phenols or cresols may be treated with disulphur dichloride; or the disulphur dichloride may be added to the tar acids and the product mixed with tar or oils.