Collector compositions for froth flotation and process for makin

Details Collector compositions for froth flotation and process for makin Collector compositions for froth flotation and process for makin

1982-07-14

1983-10-18

Kittle, John E.

Compositions

Physical separation agents

Froth-flotation or differential adherence

209166, 209901, 260455B, 260545R, C22B 300

Patent

active

044104391

ABSTRACT:
Dialkyl xanthogen formates are known collectors, but the reaction that produces them, between an alkaline alkyl xanthate and an alkaline chloroformate, also causes side reactions which produce varying amounts of xanthic anhydride, carbonyl sulfide and dialkyl carbonate as by-products, and yield of formate may be as low as 30%. There are here disclosed processing schemes for controlling the amount and type of products and by-products produced in the reaction, and flotation tests show that certain product mixtures are significantly improved collectors for sulfide ores.

REFERENCES:
patent: 2011176 (1935-08-01), Keller
patent: 2120285 (1938-06-01), MacAfee
patent: 2412500 (1946-12-01), Fischer
patent: 4191641 (1980-03-01), Fischer et al.

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