January 2007


Improve mercaptan solubility in amine units

Using this new technology can improve the bottom line

Bedell, S. A., Griffin, G. M., Pirtle, L. L., The Dow Chemical Company

More stringent regulations and legislation are pressuring gas processors to achieve deeper removal of sulfur compounds in addition to hydrogen sulfide (H2S) – namely carbonyl sulfide and mercaptans (RSHs). An increase in the amount of RSH removed by existing amine units can offer the following advantages: Elimination or reduced size of downstream treatment units Increased efficiency and extended cycle times of molecular sieve units Reducing or eliminating mercaptide or disulfide waste streams from caustic scrubbers Total sulfur content reduction in treated gas and natural gas liquids, thus increasing value. Past approaches to RSH removal. Historically, RSH elimination h

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