Chevron U.s.a. Inc.

Christopher A Simmons

David R Johnson

Stephen Joseph Miller

John Michael Rosenbaum

Donald Henry Mohr

Stephen K Lee

Dennis John O'Rear

William L Schinski

Michael Sean Driver

Brent K Lok

Philip E Quinnett

Russell Roland Krug

William James Cannella

Russell D White

James Arthur Rutherford

A base oil slate comprising three or more base oil grades having kinematic viscosities at 100&#xb0; C. between about 1.8 cSt and about 30 cSt prepared from a waxy feed wherein each of the base oil grades is a base oil blend which comprises: (a) between about 0.1 wt. % and about 99.9 wt. % of a distillation fraction prepared in light block mode operation; and (b) between about 0.1 wt. % and about 99.9 wt. % of a distillation fraction prepared in medium block mode operation. Also, a base oil slate prepared from a waxy feed, said product slate comprising 3 or more base oil grades, each base oil grade having a kinematic viscosity at 100&#xb0; C. between about 1.8 cSt and about 30 cSt and a VI greater than an amount defined by the equation VI=Ln(Vis100, in cSt)+95, wherein Ln(Vis100, in cSt) is the natural log of the kinematic viscosity at 100&#xb0; C.

Base oil slate prepared from a waxy feed

A process for producing a product slate, which includes at least three base oil grades having kinematic viscosities at 100&#xb0; C. within the range between about 1.8 cSt and 30 cSt, from a waxy feed having an initial boiling point of about 340&#xb0; C. or less and a final boiling point of about 560&#xb0; C. or higher, said process comprising (a) isomerizing at least a portion of the waxy feed, whereby the amount of isoparaffins present are increased; (b) distilling a first portion of the isomerized waxy feed in light block mode operation into at least three base oil fractions having different boiling ranges; (c) distilling a second portion of the isomerized waxy feed in medium block mode operation into at least three base oil fractions having different boiling ranges; and (d) blending at least one base oil fraction produced from light block mode with at least one base oil fraction produced from medium block mode to produce a lubricating base oil blend meeting a target value for at least one pre-selected property.

Multiple side draws during distillation in the production of base oil blends from waxy feeds

A method for preparing low toxicity Fischer-Tropsch fuels suitable for use in a diesel engine and Fischer-Tropsch derived fuel compositions having low toxicity suitable for use in diesel engines characterized by a boiling range distribution wherein the 5 weight percent point is at a temperature of 570 degrees F. or less and the 95 weight percent point is at or above a temperature of 680 degrees F.; a kinematic viscosity at 40 degrees C. of less than 5.5 cSt; and a cloud point of less than &#x2212;18 degrees C.

Low toxicity Fischer-Tropsch derived fuel and process for making same

A process for treating nitrogen-containing, substantially paraffinic product derived from a Fischer-Tropsch process. The substantially paraffinic product is purified in a purification process to lower the concentration of oxygen, nitrogen, and other impurities. The nitrogen content of the purified product is monitored, and the conditions of the purification step are adjusted to increase nitrogen removal if the nitrogen content of the purified product exceeds a preselected value.

Process for upgrading of Fischer-Tropsch products

A process for producing low pour point diesel and lubricating base oil products by bulk dewaxing a C plus Fischer-Tropsch syncrude, hydrofinishing the dewaxed intermediate, and recovering 120 degrees C. plus products having improved properties.

Process for upgrading Fischer-Tropsch products using dewaxing and hydrofinishing

A process for upgrading a Fischer-Tropsch feedstock which comprises (a) recovering from a Fischer-Tropsch reactor a Fischer-Tropsch wax fraction and a Fischer-Tropsch condensate fraction, wherein the Fischer-Tropsch condensate fraction contains alcohols boiling below about 370&deg; C.; (b) contacting the Fischer-Tropsch condensate fraction with a dehydration catalyst in a dehydration zone under dehydration conditions pre-selected to convert at least some of the alcohols present in said fraction into olefins and recovering a first intermediate effluent from said dehydration zone; (c) pyrolyzing the paraffins in the Fischer-Tropsch wax fraction in a thermal cracking zone under thermal cracking conditions pre-selected to crack the Fischer-Tropsch wax molecules to form olefins and collecting a second intermediate effluent from the thermal cracking zone; (d) passing the first and second intermediate effluents recovered from steps (b) and (c) to an oligomerization zone containing an oligomerization catalyst under oligomerization conditions to form an oligomerization mixture having a higher molecular weight than either of said first and second intermediate effluent; (e) hydrofinishing the oligomerization mixture in a hydrofinishing zone; and (f) recovering from the hydrofinishing zone a C plus hydrocarbon product, most preferably a lubricating base oil.

Process for upgrading fischer-tropsch syncrude using thermal cracking and oligomerization

A process for increasing the yield of C plus hydrocarbon products from a Fischer-Tropsch plant which comprises (a) recovering a Fischer-Tropsch condensate fraction boiling below about 700 degrees F. from the Fischer-Tropsch plant, wherein said fraction contains at least 10 weight percent and preferably more olefins; (b) contacting the olefins in the Fischer-Tropsch condensate fraction under oligomerization conditions, at a reaction temperature between about 650 degrees F. and 800 degrees F. with an oligomerization catalyst comprising active chromium on an inert support; and (c) recovering a C plus hydrocarbon product.

Process for the oligomerization of olefins in Fischer-Tropsch condensate using chromium catalyst and high temperature

A process for increasing the yield of C plus hydrocarbon products from a Fischer-Tropsch plant which comprises the steps of (a) separating a Fischer-Tropsch product into a wax fraction and a condensate fraction; (b) dewaxing the wax fraction to produce a high boiling intermediate; (c) hydrofinishing the high boiling intermediate; (d) dehydrating the alcohols in the condensate fraction to convert them into olefins; (e) oligomerizing the olefins to form higher molecular weight hydrocarbons; (f) hydrofinishing the oligomerization mixture; and (g) and recovering a C plus hydrocarbon product from the hydrofinishing zone.

Growing community of inventors

El Cerrito, CA, United States of America

Christopher A Simmons