Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2007-02-20
2007-02-20
Caldarola, Glenn (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S196000, C208S20800M, C208S226000, C208S240000
Reexamination Certificate
active
10169030
ABSTRACT:
The invention concerns a method for selectively desulphurizing thiopene compounds contained in hydrocarbons derived from crude oil distillation, whether refined or not, which consists in oxidising the thiophene sulphur atoms into sulphone in the presence of an oxidising agent and in separating said sulphonated compounds from said hydrocarbons. The invention is characterised in that it consists in oxidising the thiophene compounds in a two-phase turbulent medium comprising a hydrocarbon phase and an aqueous phase, in the presence of at least an oxidising agent soluble in at least one of the two phases and of at least a metal catalyst in soluble or dispersed form in a liquid of in solid form, separation and oxidation occurring simultaneously.
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Bernard Jean Rene
Fajula Francois
Hulea Vasile
Rabion Alain
Caldarola Glenn
Douglas John
ELF Antar France
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