B - Operations – Transporting – 03 – D
Patent
B - Operations, Transporting
03
D
361/5, 260/467.3
B03D 1/02 (2006.01) B03D 1/012 (2006.01)
Patent
CA 1233830
ABSTRACT The invention relates to novel O- or S-(2-mercaptoalkyl) mono- or dihydrocarbyl carbamothioates and S-(2-mercaptoalkyl)mono- or dihydrocarbyl carbamodithioates of the formula Image wherein R1 is hydrogen or C1-20 hydrocarbyl; R2 is C1-20 hydrocarbyl; R3 is separately in each occurrence hydrogen or C1-20 hydrocarbyl; R4 is separately in each occurrence hydrogen or C1-20 hydrocarbyl; X is O or S, and Y is O or S; with the proviso that both X and Y cannot be oxygen and with the further proviso that at least one R3 and one R4 on the same carbon atom on each alkylene moiety must be hydrogen. The novel compounds of this invention are useful as collectors in the froth flotation of sulfide mineral ores.
469561
Smart & Biggar
The Dow Chemical Company
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