THE PRODUCTION OF LOW SULFUR NAPHTHA STREAMS VIA SWEETENING AND FRACTIONATION COMBINED WITH THIOPHENE ALKYLATION

摘要

Naphtha streams, preferably cracked naphtha streams containing both olefinic compounds and mercaptans, are first treated to convert at least a portion of the mercaptans to disulfides followed by thiophene alkylation. This results in a sufficient change in boiling range to allow for separation of at least a portion of the alkylated sulfur species and disulfides from the light naphtha. This results in a low sulfur light naphtha stream with little loss in octane number.