Process for hydrocracking carbonaceous material to provide fuels or chemical feed stock
- Downers Grove, IL
A process is disclosed for hydrocracking coal or other carbonaceous material to produce various aromatic hydrocarbons including benzene, toluene, xylene, ethylbenzene, phenol and cresols in variable relative concentrations while maintaining a near constant maximum temperature. Variations in relative aromatic concentrations are achieved by changing the kinetic severity of the hydrocracking reaction by altering the temperature profile up to and quenching from the final hydrocracking temperature. The relative concentration of benzene to the alkyl and hydroxyl aromatics is increased by imposing increased kinetic severity above that corresponding to constant heating rate followed by immediate quenching at about the same rate to below the temperature at which dehydroxylation and dealkylation reactions appreciably occur. Similarly phenols, cresols and xylenes are produced in enhanced concentrations by adjusting the temperature profile to provide a reduced kinetic severity relative to that employed when high benzene concentrations are desired. These variations in concentrations can be used to produce desired materials for chemical feed stocks or for fuels.
- Research Organization:
- Gas Technology Institute, Des Plaines, IL (United States)
- DOE Contract Number:
- EX-76-C-01-2307
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4225414
- OSTI ID:
- 863666
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
hydrocracking
carbonaceous
material
provide
fuels
chemical
feed
stock
disclosed
coal
produce
various
aromatic
hydrocarbons
including
benzene
toluene
xylene
ethylbenzene
phenol
cresols
variable
relative
concentrations
maintaining
near
constant
maximum
temperature
variations
achieved
changing
kinetic
severity
reaction
altering
profile
quenching
final
concentration
alkyl
hydroxyl
aromatics
increased
imposing
corresponding
heating
rate
followed
immediate
below
dehydroxylation
dealkylation
reactions
appreciably
occur
similarly
phenols
xylenes
produced
enhanced
adjusting
reduced
employed
desired
materials
stocks
heating rate
aromatic hydrocarbons
desired material
temperature profile
carbonaceous material
maximum temperature
aromatic hydrocarbon
relative concentrations
chemical feed
relative concentration
feed stock
produce desired
hydrocracking carbonaceous
alkylation reaction
rate followed
produce various
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