Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Reexamination Certificate
2006-08-29
2006-08-29
Caldarola, Glenn A (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
C208S058000, C208S067000, C208S089000, C208S095000, C208S20800M, C208S209000, C208S212000, C208S213000, C208S097000
Reexamination Certificate
active
07097760
ABSTRACT:
A catalytic hydrocracking process for the production of ultra low sulfur diesel wherein a hydrocarbonaceous feedstock is hydrocracked at elevated temperature and pressure to obtain conversion to diesel boiling range hydrocarbons. The resulting hydrocracking zone effluent is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The first gaseous hydrocarbonaceous stream containing diesel boiling range hydrocarbons is introduced into a desulfurization zone and subsequently partially condensed to produce a hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons. The first liquid stream is separated to produce a third liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons which is also introduced into the desulfurization zone. An ultra low sulfur diesel product stream is recovered.
REFERENCES:
patent: 6096191 (2000-08-01), Kalnes
patent: 6638418 (2003-10-01), Kalnes et al.
Hoehn Richard K.
Kalnes Tom N.
Thakkar Vasant P.
Caldarola Glenn A
Cutts, Jr. John G.
Nguyen Tam M.
Paschall James C.
Tolomei John G.
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