Imidazoline conditioner for the flotation of oxidized coal

Patent · Tue May 22 00:00:00 EDT 1984

OSTI ID:6434961

Hefner, Jr, R E

Froth flotation of oxidized coal in the presence of certain imidazoline or imidazolinium salts improves both the selectivity and recovery attained. Imidazolines found particularly efficacious are those bearing a fatty alkyl group in the 2- position and an N-aminoethyl or N-hydroxyethyl group. Preferred imidazolinium salts are those corresponding to the following formula: 1-((-)OOC-CH/sub 2/-),1-(C/sub 11/ to C/sub 17/ alkyl or alkenyl-COO-CH/sub 2/-),2-R-2-imidazoline(+) wherein R is a C/sub 6/ to C/sub 22/ alkyl or alkenyl group.

• Assignee: The Dow Chemical Co.
• Patent Number(s): US 4450070
• OSTI ID: 6434961
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AQUEOUS SOLUTIONS
AZOLES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL PREPARATION
DISPERSIONS
ENERGY SOURCES
EQUIPMENT
FLOTATION
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
IMIDAZOLES
IMPURITIES
MATERIALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
PARTICLE SIZE CLASSIFIERS
REAGENTS
SALTS
SEPARATION PROCESSES
SOLUTIONS