Method for stabilizing dried low rank coals

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6917550

Yan, T Y

A method is described for protection of heated and dried pyrophoric particles, such as low rank coals, containing a reduced moisture content by treating the particles with a pyrophoric protection fluid within a vessel having a gas-solid separator in combination with a cooling fluid comprising: (a) introducing the heated and dried pyrophoric particles into a vessel which vessel lacks a means for supporting the particles during cooling thereof; (b) fluidizing the particles with the cooling fluid at ambient temperature; (c) applying a pyrophoric protection fluid to the fluidized particles thereby coating the particles sufficiently to cause at least a substantial portion of the particles to agglomerate and fall while simultaneously cooling the agglomerated particles; and (d) removing continuously the agglomerated cooled particles and the cooling fluid from the vessel. The method is also described where in step (b) the pyrophoric protection fluid is at least one member selected from the group consisting of petroleum residual oil, heavy oil, a mixture of tall oil and rosin, and gelatinized starch, in an amount of from about 0.01 weight percent to about 5 weight percent of the particles.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4650495
• OSTI ID: 6917550
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
AGGLOMERATION
AMBIENT TEMPERATURE
CHEMICAL REACTIONS
COAL FINES
COAL PREPARATION
COAL RANK
COATINGS
COMBUSTION
CONTAINERS
COOLANTS
COOLING
DEPOSITION
DRYING
ENERGY SOURCES
FLUIDIZATION
FOSSIL FUELS
FUELS
HEATING
INHIBITION
MOISTURE
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
PROTECTIVE COATINGS
SEPARATION EQUIPMENT
SPONTANEOUS COMBUSTION
STABILIZATION
SURFACE COATING
TALL OIL
THERMOCHEMICAL PROCESSES
VISCOSITY