Patent ID: 8501134
Filing Date: 2013-08-06
Classification: B01J,C10G

Abstract:
1. A method for removing sulfur from a hydrocarbonaceous feedstock that includes refractory sulfur compounds, comprising the steps of: contacting a hydrocarbonaceous feedstock that includes refractory sulfur compounds with an oxidative desulfurization catalyst to selectively oxidize at least a portion of the refractory sulfur compounds present to produce oxidized sulfur compounds and a low sulfur hydrocarbonaceous feedstock, said oxidative desulfurization catalyst comprising a solid carbon support material having oxidizing groups appended to the surface, the oxidizing groups being selected from the group consisting of sulfur trioxide, nitrogen dioxide, and combinations thereof, wherein the sulfur trioxide and nitrogen oxide groups are appended to the surface of the solid carbon support material by the steps of first contacting the support material with a gas that includes sulfur dioxide, nitrogen oxide, nitrogen dioxide, or a combination thereof at a temperature of between about 0° C. and 100° C., and then contacting the support material and the sulfur dioxide, nitrogen oxide, nitrogen dioxide, or combination thereof with molecular oxygen to produce the sulfur trioxide or nitrogen dioxide, and wherein the gas has a sufficiently low water content to prevent the formation of acid; separating the oxidized sulfur compounds from low sulfur hydrocarbonaceous feedstock; and recovering the low sulfur hydrocarbonaceous feedstock.