Short residence time coal liquefaction process including catalytic hydrogenation

Patent · Tue May 18 00:00:00 EDT 1982

OSTI ID:864211

Anderson, Raymond P ^[1]; Schmalzer, David K ^[2]; Wright, Charles H ^[1]

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1. Overland Park, KS
2. Englewood, CO

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 (26, alone, or 26 together with 42), the hydrogen pressure in the preheating-reaction zone being at least 1500 psig (105 kg/cm.sup.2), reacting the slurry in the preheating-reaction zone (26, or 26 with 42) at a temperature in the range of between about 455.degree. and about 500.degree. 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 (40, 68) to substantially immediately reduce the temperature of the reaction effluent to below 425.degree. 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.degree. 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 (83) and recycled as process solvent (16). 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.

• Research Organization: Pittsburgh and Midway Coal; SRC International Inc.
• Sponsoring Organization: USDOE
• DOE Contract Number: AC22-79ET14800; AC05-78OR03055
• Assignee: Pittsburg & Midway Coal Mining Co. (Englewood, CO)
• Patent Number(s): US 4330388
• Application Number: 06/182,697
• OSTI ID: 864211
• Country of Publication: United States
• Language: English

Related Subjects

residence
time
coal
liquefaction
process
including
catalytic
hydrogenation
normally
solid
dissolved
product
distillate
liquid
produced
continuously
passing
feed
slurry
comprising
raw
recycle
solvent
oil
hydrogen
preheating-reaction
zone
26
42
pressure
1500
psig
105
kg
cm
reacting
temperature
range
455
degree
500
dissolve
form
total
maintained
reaction
ranging
finite
value
hour
effluent
directly
contacted
quenching
fluid
40
68
substantially
immediately
reduce
below
425
inhibit
polymerization
yield
insoluble
organic
matter
comprises
weight
percent
moisture-free
basis
performed
conditions
quantity
boiling
-454
amount
equal
obtainable
performing
condition
separated
83
recycled
16
sufficient
provide
80
required
maintain
overall
balance
slurry residence
organic matter
recycle solvent
coal product
solid dissolved
slurry comprising
process including
catalytic hydrogenation
feed slurry
residence time
liquefaction process
weight percent
coal liquefaction
reaction zone
liquid product
boiling range
feed coal
process solvent
normally liquid
hydrogen pressure
solvent boiling
normally solid
substantially inhibit
raw feed
dissolved coal
distillate liquid
insoluble organic
solvent oil
comprising raw
time coal
soluble organic
continuously passing
/208/