Exxon Research and Engineering Company

Exxonmobil Research and Engineering Company

Richard Harry Ernst

Bruce R Cook

Guang Cao

Jack Wayne Johnson

Rich A McEvoy

Richard A Demmin

Stuart Leon Soled

Mark Alan Greaney

Enrique Iglesia

George M Kramer

William E Gates

John P Greeley

Robert Charles Welch

Charles Alfred Euker, Jr

William Edward Winter, Jr

Richard Alan Demmin

William Edward Winter

Charles Alfred Euker

Bruce Randall Cook

A process for reducing the amount of mercaptan sulfur in a petroleum stream without significantly changing its octane value. The process comprising a three-phase system wherein the petroleum stream to be treated is passed through a fixed bed of catalyst in the presence of a stripping gas. The stripping gas can be either hydrogen containing gas or an method wherein the composition of the catalyst utilized varies according to the stripping gas.

Catalytic stripping for mercaptan removal (ECB-0004)

The invention relates to naphtha hydrodesulfurization incorporating either high temperature depressurization or controlled heating for mercaptan removal. More particularly, the invention relates to a naphtha hydrodesulfurization process, wherein the hot naphtha exiting the desulfurization reactor contains mercaptans, most of which are removed without olefin loss, by depressurizing the hot naphtha, thermally treating the hot naphtha, or some combination thereof. The desulfurized naphtha may be cooled and condensed to a liquid, separated from the gaseous H S, stripped and sent to a mogas pool.

High temperature depressurization for naphtha mercaptan removal

The invention describes a method for preparing a low sulfur motor gasoline utilizing ethanol and caustic extraction.

Caustic extraction of mercaptans (LAW966)

A process for dewaxing waxy hydrocarbonaceous materials, such as hydrocarbon fuel and lubricating oil fractions to reduce their cloud and pour points comprises reacting the material with hydrogen in the presence of a dewaxing catalyst comprising at least one metal catalytic component and ferrierite in which at least a portion of its cation exchange positions are occupied by one or more trivalent rare earth metal cations. The rare earth ion exchanged ferrierite catalyst has good selectivity for lubricating oil production, particularly when dewaxing a Fischer-Tropsch wax hydroisomerate. Preferably at least 10% and more preferably at least 15% of the ferreirite cation exchange capacity is occupied by one or more trivalent rare earth metal cations.

Catalytic dewaxing with trivalent rare earth metal ion exchanged ferrierite

Catalytic dewaxing with trivalent rare earth metal ion exchanged

Ferrierite is ion exchanged with trivalent rare earth metals by a hydrothermal ion exchange method. The ion exchange is carried out by contacting ferrierite, in which its cation exchange positions are occupied by hydrogen or a hydrogen precursor, with an aqueous solution of one or more rare earth metal cations at a temperature above the boiling point of the solution. After the ion exchange, preferably at least 10% and more preferably at least 15% of the ferrierite cation exchange capacity is occupied by a trivalent rare earth metal cation. When combined with a catalytic metal, such as a Group VIII noble metal, the trivalent rare earth metal ion exchanged ferrierite is useful as a dewaxing catalyst having good selectivity for lubricating oil fractions, particularly when dewaxing a Fischer-Tropsch wax hydroisomerate.

Rare earth metal ion exchanged ferrierite

A process for isomerizing a paraffin feed comprising contacting the feed with a strong, solid acid catalyst comprising a sulfated Group IVB metal oxide and at least one Group VIII metal in the presence of hydrogen and an adamantane compound.

Isomerization of paraffins with strong solid acid catalyst and adamantane

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Glen Gardner, NJ, United States of America

Richard Harry Ernst