Exxonmobil Research and Engineering Company

Exxon Research and Engineering Company

Loren Leon Ansell

Jack Wayne Johnson

Adeana Richelle Bishop

William Berlin Genetti

Robert J Wittenbrink

Paul Joseph Berlowitz

Nancy Marie Page

Rocco A Fiato

Daniel Francis Ryan

Tapan Chakrabarty

Tapan Chakrabaty

Bruce R Cook

Eric Bart Sirota

Louis F Burns

Gregg Johnston Howsmon

Hu Gang

Louis Francis Burns

Robert Jay Wittenbrink

Fischer-Tropsch hydrocarbon synthesis using a noncobalt catalyst is used to produce waxy fuel and lubricant oil hydrocarbons from synthesis gas derived from natural gas. The waxy hydrocarbons are hydrodewaxed, with reduced conversion to lower boiling hydrocarbons, by contacting the waxy hydrocarbons, in the presence of hydrogen, with an unsulfided hydrodewaxing catalyst that has been reduced and then treated by contacting it with a stream containing one or more oxygenates.

Oxygenate treatment of dewaxing catalyst for greater yield of dewaxed product

A heavy hydrocarbon composition with utility as a heavy hydrocarbon base stock comprising at least 95 wt % paraffin molecules, of which at least 90 wt % are isoparaffin, containing hydrocarbon molecules having consecutive numbers of carbon atoms, is a liquid at 100&#xb0; C., at which temperature its kinematic viscosity, as measured by ASTM D-445, is above 8 cSt, has an initial boiling point of least 850&#xb0; F. (454&#xb0; C.) and an end boiling point of at least 1000&#xb0; F. (538&#xb0; C.), wherein the branching index (BI), as measured by the percentage of methyl hydrogens, and the branching proximity (CH&#x3e;4), as measured by the percentage of recurring methylene carbons which are four or more carbon atoms removed from an end group or branch, of said isoparaffinic hydrocarbon molecules, are such that:

Heavy hydrocarbon composition with utility as a heavy lubricant base stock

Fischer-Tropsch hydrocarbon synthesis using a cobalt catalyst is used to produce waxy fuel and lubricant oil hydrocarbons from synthesis gas derived from natural gas. The waxy hydrocarbons are hydrodewaxed, with reduced conversion to lower boiling hydrocarbons, by contacting the waxy hydrocarbons, in the presence of hydrogen, with an unsulfided 10-ring, 1-dimensional zeolite catalyst that has been reduced and then treated by contacting it with the synthesized hydrocarbons containing one or more oxygenates, including indigenous oxygenate. Tail gas from the hydrodewaxing reactor can be used for the hydrocarbon synthesis.

Dewaxed fuel and lubricant base stocks are made by (a) producing a synthesis gas from natural gas, (b) reacting the Hand CO in the gas in the presence of a cobalt Fischer-Tropsch catalyst, at reaction conditions effective to synthesize a waxy hydrocarbon feed boiling in the fuel and lubricant oil ranges, which is hydrodewaxed in a first stage to produce a dewaxed fuel and a partially dewaxed lubricant fraction. The partially dewaxed lubricant fraction is separated into heavy and lower boiling fractions each of which is separately hydrodewaxed, to produce lubricant base stocks. A hydrodewaxing catalyst comprising a hydrogenation component, binder and solid acid component used to hydrodewax at least one, and preferably at least two of the waxy feed and partially dewaxed heavy and lower boiling lubricant fractions.

Production of fuels and lube oils from fischer-tropsch wax

A hydrocarbon wax product from a hydrocarbon synthesis slurry comprising liquid synthesis product and catalyst particles is purified by introducing a portion of hydrocarbon synthesis slurry from a hydrocarbon synthesis zone to a treatment zone in which a treatment gas contacts the hydrocarbon synthesis slurry. Hydrogen or a hydrogen-containing gas is useful as the treatment gas. The gas treatment removes impurities from the hydrocarbon wax portion of the hydrocarbon synthesis slurry. Purified wax product is separated and removed in situ via wax withdrawal means. This avoids or minimizes the need for further treating the wax product.

Production of high purity fisher-tropsch wax

A synthetic, isoparaffinic heavy hydrocarbon composition useful as a heavy lubricant base stock contains hydrocarbon molecules having consecutive numbers of carbon atoms, is a liquid at 100&#xb0; C., at which temperature its kinematic viscosity is above 8 cSt and has respective initial and end boiling points of at least 850 and 1000&#xb0; F. (454 and 538&#xb0; C.). The branching index BI and the branching proximity CH&#x3e;4 of the isoparaffinic hydrocarbon molecules, are such that:BI&#x2212;0.5(CH&#x3e;4)&#x3c;15; and&#x2003;&#x2003;(a)BI+0.85(CH&#x3e;4)&#x3c;45;&#x2003;&#x2003;(b)as measured over the hydrocarbon composition as a whole.

Synthetic isoparaffinic premium heavy lubricant base stock

Wax in water emulsions prepared from Fischer-Tropsch derived waxes, Fischer-Tropsch process water, and two alkyl ethoxylated phenol nonionic surfactants having different hydrophilic-lipophilic balances provide high performance pipeline transport of waxes with reduced pipeline fouling.

Wax transport composition

Stable hydrocarbon in water emulsions are formed by emulsifying the hydrocarbon with a non-ionic surfactant and water obtained from the Fischer-Tropsch process.

Fischer-tropsch process water emulsions of hydrocarbons (law548)

Fischer-Tropsch liquids, useful as distillate fuels are emulsified with water and a non-ionic surfactant.

Water emulsions of Fischer-Tropsch liquids (LAW516)

Hydrocarbon in water emulsions comprising Fischer-Tropsch process water, at least 20 to about 90 weight percent of a Fischer-Tropsch wax, a first nonionic surfactant having an HLB of at least 11 and a second nonionic surfactant having an HLB less than 11. Said emulsions are liquid at room temperature and pour by ordinary gravity. Also disclosed are methods of making said hydrocarbon in water emulsions.

Water emulsions of Fischer-Tropsch waxes

The invention is a process for producing a mixture of wax and crude oil which can be pumped at ambient temperature. The wax is preferably a Fisher-Tropsch wax. The temperature of the crude oil is controlled to a level below the dissolution temperature of the wax. The wax crystals are homogenized and dispersed into the crude oil to form a mixture. The present invention prevents the wax from dissolving in the crude oil and subsequently re-crystallizing at lower temperatures which can substantially increase the viscosity of the mixture thereby decreasing the effectiveness of transporting the mixture.

Growing community of inventors

Baton Rouge, LA, United States of America

Loren Leon Ansell