Compositions – Physical separation agents – Froth-flotation or differential adherence
Reexamination Certificate
2008-07-01
2008-07-01
Lithgow, Thomas M (Department: 1797)
Compositions
Physical separation agents
Froth-flotation or differential adherence
C209S166000
Reexamination Certificate
active
07393462
ABSTRACT:
A mineral beneficiating reagent containing an alkyl hydroxamic acid or salt thereof and a nonionic surfactant. The alkyl hydroxamic acid or a salt thereof is represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?R—C(═O)N(R″)—OM,in-line-formulae description="In-line Formulae" end="tail"?wherein R is linear or branched C2-C18 alkyl, linear or branched C2-C18 alkenyl, C6-C20 aryl or substituted aryl, C7-C26 aralkyl or substituted aralkyl; R″ is H, C1-C12 alkyl or aralkyl; M is hydrogen, an alkali metal, or an ammonium cation represented by N+(A,B,C,D) wherein each of A,B,C,D, respectively, are H or C1-C6 alkyl or benzyl radicals. The nonionic surfactant can be any known nonionic surfactant, including but not limited ethoxylated alcohols, esters, ethoxylated acids, ethoxylated (alkyl) phenols, alcanolamides, polyethylene oxide copolymers and mixtures thereof.
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McCutcheon's Emulsifiers and Detergents International vol. 1 (2003).
Gorken Abdul
Magliocco Lino G.
Nagaraj D. R.
Ravishankar S. A.
Rothenberg Alan S.
Cytec Technology Corp.
Lithgow Thomas M
Wasserman Fran
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