Exxonmobil Research and Engineering Company

Exxon Research and Engineering Company

Imperial Oil Limited

Lawrence J Lawlor

Joseph L Feimer

Bal K Kaul

Robert J Falkiner

William J Murphy

Ramesh R Hemrajani

Jeenok Theresa Kim

Ashok Uppal

David J LeClair

G Bryce McGarvey

Bal Krishan Kaul

Joseph Louis Feimer

Kaul Bal K

Mcgarvey G Bryce

David J Leclair

A process for removing elemental sulfur from liquid hydrocarbon steams such as transportation fuel streams, e.g. gasoline, diesel, kerosene, and jet, by contacting such streams with an immiscible aqueous solution under static mixing conditions. The aqueous solution contains a caustic and an effective amount of a Group I or Group II metal sulfide or polysulfide. The elemental sulfur in the stream is converted to a polysulfide that is not soluble in the hydrocarbon stream but is soluble in the aqueous solution, thus resulting in a hydrocarbon product stream having a substantially lower level of elemental sulfur.

Removal of elemental sulfur in pipelines using static mixers

A method for reducing the level of elemental sulfur from sulfur-containing hydrocarbon streams as well as reducing the level of total sulfur in such streams. Preferred hydrocarbon streams include fuel streams such as naphtha and distillate streams that are transported through a pipeline. The sulfur-containing hydrocarbon stream is blended with an aqueous solution of water, a caustic, and at least one metal sulfide thereby resulting in an organic phase and an aqueous phase. The blended stream is then passed through a bed of solids having a suitable surface area so that a substantial amount of the sulfur moieties are removed by the aqueous phase.

Method for reducing the level of elemental sulfur and total sulfur in hydrocarbon streams

A process for removing relatively low levels of high molecular weight organic sulfur from hydrocarbon streams, particularly from streams that have picked-up such sulfur while being transported through a pipeline. The hydrocarbon stream containing the organic sulfur is passed through a bed of adsorbent material comprised of a high Ni content, high surface area material that also contains an effective amount of SiOor GeOand an alkaline earth metal.

Method for reducing the amount of high molecular weight organic sulfur picked-up by hydrocarbon streams transported through a pipeline

A process for removing sulfur compounds from hydrocarbon streams by contacting the hydrocarbon stream, especially a gasoline stream, with an adsorbent material. The adsorbent material is regenerated with hydrogen or a hydrogen/HS mixture.

Process to remove sulfur contaminants from hydrocarbon streams

Naphtha is isomerized using a medium-pore zeolite catalyst. Isomerization is accomplished by contacting the hydrocarbon with the medium-pore zeolite catalyst at a temperature in the range 200.degree. to 400.degree. C., preferably, at a space velocity of 0.05 to 75 v/v/hr, preferably, at a pressure at 14.7 to 1500 psig. The medium zeolite catalyst employed has a silica to alumina ratio in the range of about 5 to &gt;30, preferably 10-20, more preferably 12-17 and a pore size of about 5.5 to 6.8 .ANG.. The preferred medium pore zeolite is a zeolite of the offretite type. The zeolite preferably has associated with it a hydrogenation component which is typically a Group VIII metal, oxide or sulphide, or mixtures thereof, preferably platinum or palladium. The preferred offretite type zeolite may be any of the readily available commercial materials and may have their SiO.sub.2 /Al.sub.2 O.sub.3 ratios enhanced by typical methods such as H-EDTA or mineral acid leaching, or similarly may be any of the specialty offretites and offretite type zeolites now being described in the patent or general literature.

Naphtha isomerization using a medium pore zeolite catalyst

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Camlachie, Canada

Lawrence J Lawlor