Two-stage hydrodesulfurization and hydrogenation process for distillate hydrocarbons

Patent · Tue May 19 04:00:00 EDT 1992

OSTI ID:5053025

Haun, E C; Thompson, G J; Gorawara, J K; Sullivan, D K

This patent describes a hydrotreating process. It comprises passing a stream of middle distillate charge stock into the first of at least two reaction zones and producing a first reaction zone effluent, the two reaction zones comprising a first catalytic reaction zone containing a fixed bed of solid desulfurization catalyst; separating the first reaction zone effluent into liquid and vapor fractions and stripping the liquid fraction with hydrogen in a stripping zone operated at stripping conditions including a temperature of 150 to 200 degrees C. to produce a first stripping zone gas stream, and then heating the resultant liquid fraction by indirect heat exchange against the first reaction zone effluent stream at a point prior to the separation of the first reaction zone effluent; removing hydrogen sulfide from the first stripping zone gas stream, and passing the first stripping zone gas stream into the second reaction zone; passing the liquid fraction of the effluent of the first reaction zone into the second reaction zone after heating from stripping conditions by indirect heat exchange against the first reaction zone effluent and producing a second reaction zone effluent; and separating hydrogen-rich gas from the second reaction zone effluent and passing portions of hydrogen-rich gas separated from the second reaction zone effluent directly into both the first and the second reaction zones, and recovering a reduced aromatic hydrocarbon content product stream from the effluent of the second reaction zone.

• Assignee: UOP Des Plaines, IL (United States)
• Patent Number(s): US 5114562; A
• Application Number: PPN: US 7-562172
• OSTI ID: 5053025
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
020800 -- Petroleum-- Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT
CRACKING
DECOMPOSITION
DESULFURIZATION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCRACKING
HYDROGEN
HYDROGENATION
KINETICS
METALS
NONMETALS
PACKED BEDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PLATINUM
PLATINUM METALS
PYROLYSIS
REACTION KINETICS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS