A new approach in ultrapurification of coal by selective flocculation: Quarterly report

Technical Report · Wed Mar 01 04:00:00 EST 1989

DOI:https://doi.org/10.2172/6209554· OSTI ID:6209554

Moudgil, Brij M. ^[1]

---

1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL (United States)

Preparation of coal, coal refuse, quartz and clay samples along with proximate and ultimate analyses of coal and coal refuse were completed. The coal pyrite sample is expected to be received soon. Several polymers of different nature, ionic character and molecular weight were examined for their potential as selective flocculants for only coal or coal refuse. Based on single component flocculation tests, Superfloc 362 (polyacrylamide), (highly cationic), exhibited selectivity towards flocculating quartz/coal refuse. Superfloc 206 (acrylate/acrylamide copolymer), highly anionic, on the other hand, seems to flocculate coal and clays. Flocculation tests of the coal-quartz system with Superfloc 362 indicated the possibility of separating coal from the mixture. Mathematical simulation of selective flocculation of coal/clay and coal/quartz with respect to the effect of the active sites ratio at two levels of impurity content has been completed. It is indicated that selectivity in these systems is possible even when the active sites ratio is low. In other words, it is not necessary to completely eliminate the active sites (for polymer adsorption) on the inert component to achieve the desired separation. 17 refs., 11 figs., 3 tabs.

• Research Organization: Florida Univ., Gainesville, FL (USA). Dept. of Materials Science and Engineering
• Sponsoring Organization: USDOE
• DOE Contract Number: FG22-88PC88917
• OSTI ID: 6209554
• Report Number(s): DOE/PC/88917-T1; ON: DE89010820
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ACRYLAMIDE
ALCOHOLS
AMIDES
ASH CONTENT
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CLAYS
COAL
DOCUMENT TYPES
ENERGY SOURCES
FLOCCULATION
FOSSIL FUELS
FUELS
GLYCOLS
HYDROXY COMPOUNDS
MATERIALS
MATHEMATICAL MODELS
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POLYETHYLENE GLYCOLS
POLYMERS
PRECIPITATION
PROGRESS REPORT
QUARTZ
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SPECIFICITY