Flotation of oxidized coal with a latex emulsion of sodium polyacrylate used as a promoter

Patent · Tue Sep 16 00:00:00 EDT 1980

OSTI ID:6738624

Finch, R E

A method and treating agent for increasing the yield of oxidized coal or coal from surface or strip mines where said coal particles are concentrated by froth flotation. The method consists of utilizing as a promoter or frothing aid about 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. The preferred promoter or frothing aid for oxidized coal is a water-in-oil latex of sodium polyacrylate 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 hydrophilic (Or activator) 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. The latex emulsion has demonstrated superiority as a flotation promoter for oxidized coal over the dry polymer and exhibits synergism over the dry polymer and over the components of the latex emulsion including a paraffin solvent, a hydrophobic emulsifier such as sorbitan monooleate, a solvent such as espersol 3-e (Charter; an aromatic blend) and stabilizers such as polyisobutylene and aluminum tristearate.

• Assignee: Nalco Chemical Co
• Patent Number(s): US 4222862
• OSTI ID: 6738624
• Resource Relation: Patent File Date: Filed date 6 Oct 1978
• Country of Publication: United States
• Language: English

Related Subjects

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