Wednesday, June 25, 2008 - 10:20 AM
New York (Capital Hilton)
52

Improved Control of Organic Sulfur

Stephen A. Bedell, The Dow Chemical Company, Lake Jackson, TX

Mercaptans are often found in natural gas and refinery waste streams and have traditionally been among the most difficult of sulfur compounds to deal with. Though scrubbing with amine solvents is an excellent way to remove hydrogen sulfide, such technologies are limited in the amount of mercaptan removal that can be accomplished. Failure to adequately remove organic sulfur compounds in the amine scrubber results in one of two environmental problems; use of caustic scrubbers for mercaptan removal results in hard to treat mercaptide or disulfide waste products, or the sulfur ends up at higher levels in various hydrocarbon fractions which are used as fuels. A novel mercaptan removal technology will be presented which allow the existing amine scrubbers to remove substantially higher levels of mercaptans. New views of mercaptan/amine chemistry will be presented along with commercial testing results.