Danafloat 871 is an aqueous solution of dialkyl dithiophosphate and mercaptobenzothiazole.

Danafloat 871 has little or no frothing properties. It requires a longer conditioning time than do the xanthates and for this
reason is usually added to a conditioning step or in some instances to the grinding mill.

Danafloat 871 is used in the flotation of oxidized lead and copper ores after sulfidization in a soda ash circuit, alone or
in conjunction with xanthate or other dithiophosphate type collectors in the flotation of copper and lead in complex sulphide ores and gold-silver ores. In cases where copper and lead are somewhat slower floating, Danafloat 871 may produce a faster flotation kinetic than other collectors.

It has also found use in the flotation of pyrite in acid circuits in the pH range of 4 to 6. In the latter case the dosage of Danafloat 871 is considerably lower than for xanthates. Danafloat 871 is rated an excellent collector in the flotation of auriferous pyrite.

Danafloat 871 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 871 varies with the type of ore, usually falling in the range of 10 to 100 grams per metric ton.

Experience has shown that Danafloat 871 is effective in the pH range of 3-12.

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Composition

Chemical name: i-propyl-dtp-Na, s-butyl-dtp-Na and MBTNa
CAS name: Phosphorodithioic acid, O,O-bis(1-methylethyl) ester, sodium salt, phosphorodithioic acid, O,O-bis(1-methylpropyl) ester, sodium salt and 2(3H)-Benzothiazolethione, sodium salt
Active ingredient: 24-26%, 6-7% and 11-12% by weight respectively

Physical properties

Appearance: Yellow to brown
Form: Liquid (aqueous solution)
Boiling point: 104-105 degrees C
Melting/freezing point: Minus 9 to minus 11 degrees C
Specific gravity: 1.16 g/ml
Flash point: >100 degrees C