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

Patent · 01 January 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

/208/
ammonia
ammonia gas
atmospheric
atmospheric distillation
bottoms
carbonaceous
carbonaceous feed
carbonaceous material
coal
contacted
containing
controlled
conversion process
distillation
distillations
effluent
embodiment
feed
feed material
feed materials
feeds
final
followed
gas
heavy
heavy bottoms
hydroconversion
hydroconversion process
hydrogen
increasing
liquids
material
materials
molecular
molecular hydrogen
molecular weight
petroleum
petroleum resid
preferred
preferred embodiment
presence
prevented
prior
processes
produce
produced
rapidly
reactor
reduce
remove
residuum
separation
separation step
separation steps
similar
similar carbonaceous
step
steps
stream
stream containing
streams
streams produced
subjected
treating
unconverted
vacuum
vacuum distillation
viscosity
weight