Process for production of methylene bisxanthates

Details Process for production of methylene bisxanthates Process for production of methylene bisxanthates

1989-04-28

1991-04-30

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Esters having the thiocarboxylate group, -cx-, wherein the...

558246, C07C32736

Patent

active

050119656

ABSTRACT:
A methylene bisxanthate chemical compound is produced by reaction of an aqueous solution of an alkaline xanthate with methylene chloride in the presence of a polyethylene glycol (PEG) with alcoholic terminal groups as a phase transfer catalyst. The PEG is water soluble and may be recovered and recycled in the process. The reaction product may be purified, but can be used in the crude state as a collector reagent in the froth flotation of sulfide minerals, or of sulfidized oxide minerals, from their ores.

REFERENCES:
patent: 3011887 (1961-12-01), Cupery et al.
patent: 3667931 (1972-06-01), Viste et al.
Dehmlow, et al., Phase Transfer catalysis, Verlag Chemie, Deerfield Beach, FL., 1980, p. 74.

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