Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2008-12-19
2011-10-25
Griffin, Walter (Department: 1774)
Mineral oils: processes and products
Refining
Sulfur removal
C208S049000, C208S057000, C208S212000, C208S243000, C208S244000
Reexamination Certificate
active
08043495
ABSTRACT:
A process for reducing the sulfur content of a hydrocarbon stream, including: feeding a hydrocarbon stream including sulfur compounds to a catalytic distillation reactor having one or more hydrodesulfurization reaction zones; feeding hydrogen to the catalytic distillation reactor; concurrently in the catalytic distillation reactor: fractionating the hydrocarbon stream into a heavy fraction and a light fraction; contacting hydrogen and the light fraction to form H2S and a light fraction of reduced sulfur content; recovering the light fraction, H2S, and hydrogen as an overheads; recovering the heavy fraction; heating the overheads to a temperature from 500 to 700° F.; feeding the heated overheads and hydrogen to a high temperature low pressure reactor to form H2S and a reactor effluent of reduced mercaptan content; separating the reactor effluent, H2S, and unreacted hydrogen to form a light hydrocarbon fraction and a fraction including H2S and hydrogen; recycling a portion of the light hydrocarbon fraction to the catalytic distillation reactor.
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Catalytic Distillation Technologies
Griffin Walter
McCaig Brian
Osha • Liang LLP
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