Drying low rank coal and retarding spontaneous ignition

Patent · Tue Oct 04 04:00:00 EDT 1988

OSTI ID:6931591

Bixel, J C

This patent describes a method for producing a dried particulate coal fuel comprising: (a) reducing raw coal feedstock to a particle size having an average diameter of about 0.2 to 0.5 inches; (b) drying the resultant particulate raw coal to a moisture content of less than about 10 percent by weight by contacting it with a stream of drying gas in a drying zone; (c) while the coal is in the drying zone, spraying and intimately mixing the dried coal with a deactivating composition at a temperature between about 190/sup 0/F. and about 230/sup 0/F., the composition being selected from the group consisting of light cycle oil, heavy cycle oil, clarified slurry oil, solutions of durene in gasoline distillates or residuums derived from petroleum or coal and mixtures of two or more of the preceding; and, (d) subsequently removing the coal from the drying zone and cooling it.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4775390
• OSTI ID: 6931591
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL FINES
COAL RANK
COMBUSTION
COMBUSTION PROPERTIES
COMMINUTION
DISTILLATES
DRYING
DURENE
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
MATERIALS
MIXING
ORGANIC COMPOUNDS
OXIDATION
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
PRODUCTION
SPONTANEOUS COMBUSTION
THERMOCHEMICAL PROCESSES