Patent ID: 6960291
Filing Date: 2005-11-01
Classification: C10G

Abstract:
1. A naphtha desulfurization method, comprising: (a) contacting a sulfur-containing naphtha with hydrogen in the presence of a catalytically effective amount of a hydrotreating catalyst under catalytic hydrotreating conditions to form a hydrodesulfurized naphtha; (b) contacting the hydrodesulfurized naphtha with a first phase of a treatment composition containing water, alkali metal hydroxide, cobalt phthalocyanine sulfonate, and alkylphenols and having at least two phases, (c) extracting mercaptan sulfur from the hydrodesulfurized naphtha to the first phase; and (d) separating an upgraded naphtha having less mercaptan sulfur than the hydrodesulfurized naphtha.