Danafloat 245 is an aqueous solution of dialkyl dithiophosphate.

Danafloat 245 has practically no frothing characteristics. It is fast and compared to other thiol collectors more selective in the flotation of copper sulphides in the presence of zinc and of iron sulphides and copper-activated zinc sulphides from iron sulphides. Other applications are flotation of copper-activated iron sulphides, flotation of nickel-bearing minerals, antimony minerals, chalcocite and for improvement in the recovery of precious metals, e.g. gold, silver, platinum. Danafloat 245 floats oxide copper minerals as well as sulphide copper in a sulphide-oxide ore very well. This collector has found application in the bulk flotation of copper and cobalt minerals in conjunction with other thiol collectors, usually at neutral pH.

Danafloat 245 requires only very short conditioning time and is therefore useful for staged addition. It can be used alone or in some cases in combination with an auxiliary collector, such as xanthates.

Experience has shown that a mixture of alkyldithiophosphate and a xanthate is often better than either of these two types of collectors alone.

Danafloat 245 can be added undiluted or preferably diluted with clear water to 5-20% solutions. It is good practice to stir before use.

The dosage of Danafloat 245 is usually considerably less than for other sulphide collectors and varies with the type of ore, usually falling within the range of 10 to 50 grams per metric ton ore.

Experience has shown that Danafloat 245 is effective in the pH range of 4-12. Because of its selectivity towards iron sulphides, Danafloat 245 can be used at slightly lower pH than xanthates.

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Composition

Chemical name: i-butyl-dtp-Na
CAS name: Phosphorodithioic acid, O,O-diisobutyl ester, sodium salt
Active ingredient: 49-51% by weight

Physical properties

Appearance: Light brown
Form: Liquid (aqueous solution)
Boiling point: 107 degrees C
Melting/freezing point: Minus 11 degrees C
Specific gravity: 1.13 g/ml
Flash point: None