Treatment and recovery of larger particles of fine oxidized coal

Patent · Tue Sep 16 00:00:00 EDT 1980

OSTI ID:6738609

Finch, R E

This invention relates to a method and treating agent for increasing the yield of larger particles of fine oxidized coal where the particle size is 28 X 100 mesh and preferably 28 X 70 mesh and where said coal particles are concentrated by froth flotation. The method consists of utilizing as a promoter an alkali metal or ammonium polyacrylate. A preferred promoter is about 0.05-1.5 lbs of sodium polyacrylate latex per ton of dry coal (0.017-0.5 lb of dry sodium polyacrylate per ton of dry coal), having an average molecular weight of about 100,000, to 1, 000,000 and more, with a preferred range of 1,000,000 or more. This preferred promoter or frothing aid for oxidized coal is a water-in-oil latex of sodium polyacrylate used with a water-inoil emulsifier and preferably used with an alcohol-type frother. The latex may be utilized neat and self inverts with the assistance of an oil-in-water surfactant and the water in the system upon application to form an oil-in-water emulsion, or it may be used as a two part system with an activator (Aqueous) to promote inversion. Additionally, the latex emulsion recovers larger particles in the size 100 mesh and greater and preferably in the range 28 X 70 mesh.

• Assignee: Nalco Chemical Co
• Patent Number(s): US 4222861
• OSTI ID: 6738609
• Resource Relation: Patent File Date: Filed date 8 Jun 1978
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
FLOTATION
EMULSIONS
LATEX
POLYACRYLATES
PROMOTERS
CARBONACEOUS MATERIALS
COLLOIDS
DISPERSIONS
ELASTOMERS
ENERGY SOURCES
ESTERS
FOSSIL FUELS
FUELS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYVINYLS
RUBBERS
SEPARATION PROCESSES
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage