Process for deep desulfurization of cracked gasoline with minimum octane loss (Indian Oil Corp)

Process for deep desulfurization of cracked gasoline with minimum octane loss (Indian Oil Corp)

Type	Patent
Inventor	Sarvesh Kumar
Inventor	Alok Sharma
URL	Free Full Text Source: http://www.google.com/patents/US9260672
Assignee	Indian Oil Corporation Limited
Patent Number	US9260672 B2
Issue Date	Feb 16, 2016
Abstract	The present invention provides a process for deep desulphurization of cracked gasoline with minimum octane loss of about 1-2 units. In this process full range cracked gasoline from FCC, Coker, Visbreaker etc is sent to Diolefin Saturation Reactor for selective saturation of diolefins. After saturation of diolefins, the stream is sent to Splitter for splitting into three cuts i.e Light Cut (IBP-70° C.), Intermediate Cut (70-90° C.) and Heavy Cut (90-210° C.). The Light Cut which contains majority of the high octane olefins and mercaptan sulfur is desulfurized with caustic treatment using Continuous Film Contactor (CFC). The sulfur in the Intermediate Cut is also predominantly mercaptans and the cut can be desulfurized by caustic treatment using CFC along with Light cut or separately desulfurized before being sent for isomerization. The Heavy Cut containing mainly thiophinic sulfur compounds is treated either by using conventional HDS process or reactive adsorption process.