Patent ID: 9181498
Filing Date: 2015-11-10
Classification: C10G

Abstract:
1. A process for removing sulfur compounds from a liquid hydrocarbon stream, the process comprising: (a) feeding a liquid hydrocarbon stream to a recirculation section of an extraction vessel, the recirculation section including a feed deck and one or more liquid-liquid contacting decks above the feed deck, the recirculation section containing a first alkaline solution suitable for converting mercaptans to mercaptides; (b) passing the hydrocarbon stream through the recirculation section; (c) withdrawing a first alkaline stream including the first alkaline solution and mercaptides from the recirculation section; (d) recirculating at least a part of the first alkaline stream to a top deck of the one or more liquid-liquid contacting decks of the recirculation section; (e) passing the hydrocarbon stream from the recirculation section to an extraction section of the extraction vessel, the extraction section including one or more liquid-liquid contacting decks; (f) feeding a second alkaline stream to an upper deck of the one or more liquid-liquid contacting decks of the extraction section, the second alkaline stream including a second alkaline solution suitable for converting mercaptans to mercaptides; and (g) withdrawing a hydrocarbon product stream from an exit opening of the extraction vessel.