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

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...

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Bibliographic Details
Main Author STUNTZ, GORDON, F
Format Patent
LanguageEnglish
French
Published 03.03.2005
Edition7
Subjects
CHEMISTRY
CRACKING HYDROCARBON OILS
FUELS
LUBRICANTS
METALLURGY
MINERAL WAXES
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION
RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES
REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS
REFORMING OF NAPHTHA
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary: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. La présente invention concerne des flux de naphta, de préférence des flux de Naphta craqué contenant à la fois des composés oléfiniques et des mercaptans ; lesquels flux sont d'abord traités de manière à transformer au moins une partie des mercaptans en bisulfures, puis par alkylation de thiofène. Ce mode de réalisation permet d'obtenir une modification suffisante des limites d'ébullition pour permettre la séparation d'au moins une partie des espèces sulfureuses alkylées et des bisulfures du naphta léger avec une faible perte du nombre d'octanes.
Bibliography:Application Number: WO2004US24832