Use of ammonia to reduce the viscosity of bottoms streams produced in hydroconversion processes

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865005

Zaczepinski, Sioma ^[1]; Billimoria, Rustom M ^[1]; Tao, Frank ^[2]; Lington, Christopher G ^[1]; Plumlee, Karl W ^[2]

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1. Houston, TX
2. Baytown, TX

Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular weight liquids and produce a heavy bottoms stream containing high molecular weight liquids and unconverted carbonaceous material. The viscosity of the bottoms streams produced in the separation step or steps is prevented from increasing rapidly by treating the feed to the separation step or steps with ammonia gas prior to or during the separation step or steps. The viscosity of the heavy bottoms stream produced in the final separation step is also controlled by treating these bottoms with ammonia gas. In a preferred embodiment of the invention, the effluent from the hydroconversion reactor is subjected to an atmospheric distillation followed by a vacuum distillation and the feeds to these distillations are contacted with ammonia during the distillations.

• Research Organization: Exxon Research and Engineering Co.
• DOE Contract Number: EF-77-A-01-2893
• Assignee: Exxon Research and Engineering Co. (Florham Park, NJ)
• Patent Number(s): US 4448665
• OSTI ID: 865005
• Country of Publication: United States
• Language: English

Related Subjects

ammonia
reduce
viscosity
bottoms
streams
produced
hydroconversion
processes
coal
petroleum
residuum
similar
carbonaceous
feed
materials
subjected
presence
molecular
hydrogen
produce
effluent
separation
steps
remove
weight
liquids
heavy
stream
containing
unconverted
material
step
prevented
increasing
rapidly
treating
gas
prior
final
controlled
preferred
embodiment
reactor
atmospheric
distillation
followed
vacuum
feeds
distillations
contacted
ammonia gas
molecular hydrogen
conversion process
feed material
preferred embodiment
carbonaceous material
molecular weight
stream containing
feed materials
vacuum distillation
similar carbonaceous
separation step
streams produced
carbonaceous feed
separation steps
heavy bottoms
hydroconversion process
petroleum resid
atmospheric distillation
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