Short residence time coal liquefaction process including catalytic hydrogenation

Patent · Tue May 18 04:00:00 EDT 1982

OSTI ID:7013626

Anderson, R P; Schmalzer, D K; Wright, C H

Normally solid dissolved coal product and a distillate liquid product are produced by continuously passing a feed slurry comprising raw feed coal and a recycle solvent oil and/or slurry together with hydrogen to a preheating-reaction zone, the hydrogen pressure in the preheating-reaction zone being at least 1,500 psig (105 kg/cm[sup 2]), reacting the slurry in the preheating-reaction zone at a temperature in the range of between about 455 and about 500 C to dissolve the coal to form normally liquid coal and normally solid dissolved coal. A total slurry residence time is maintained in the reaction zone ranging from a finite value from about 0 to about 0.2 hour, and reaction effluent is continuously and directly contacted with a quenching fluid to substantially immediately reduce the temperature of the reaction effluent to below 425 C to substantially inhibit polymerization so that the yield of insoluble organic matter comprises less than 9 weight percent of said feed coal on a moisture-free basis. The reaction is performed under conditions of temperature, hydrogen pressure and residence time such that the quantity of distillate liquid boiling within the range C[sub 5]-454 C is an amount at least equal to that obtainable by performing the process under the same condition except for a longer total slurry residence time, e.g., 0.3 hour. Solvent boiling range liquid is separated from the reaction effluent and recycled as process solvent. The amount of solvent boiling range liquid is sufficient to provide at least 80 weight percent of that required to maintain the process in overall solvent balance. 6 figs.

• Research Organization: Pittsburgh and Midway Coal; SRC International Inc.
• DOE Contract Number: AC22-79ET14800; AC05-78OR03055
• Assignee: Pittsburg Midway Coal Mining Co., Englewood, CO (United States)
• Patent Number(s): A; US 4330388
• Application Number: PPN: US 6-182697
• OSTI ID: 7013626
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
DISPERSIONS
DISSOLUTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL SLURRIES
FUELS
HYDROGENATION
KINETICS
LIQUEFACTION
LIQUIDS
MATERIALS
MIXTURES
PROCESS SOLUTIONS
REACTION KINETICS
RECYCLING
SLURRIES
SOLUTIONS
SOLVENT-REFINED COAL
SUSPENSIONS
THERMOCHEMICAL PROCESSES