Back to results
US 7,402,187 B2Granted
Recovery of alcohols from Fischer-Tropsch naphtha and distillate fuels containing the same
AssigneeChevron U.S.A. Inc.
InventorsDennis J. O'Rear, Thomas Van Harris, Cong-Yan Chen
Life of this patent
Estimating the term…
Abstract
Olefins and alcohols present in Fischer-Tropsch products are converted to primary and secondary alkyl alcohols having at least four carbons through acid catalyzed etherification and hydrolysis reactions. The alcohols are added to a highly isoparaffinic distillate fuel blend, improving the lubricity of the mixture, and forming a distillate fuel with improved lubricity.
Claims10
A process for making a distillate fuel blend composition comprising:
- (a) obtaining a highly paraffinic distillate fuel blend component containing at least 50 wt. % isoparaffins and having a lubricity as measured by ASTM D6078 of less than about 3100 grams;
- (b) obtaining at least one primary or secondary alkyl alcohol having at least four carbon atoms by a process selected from the group consisting of alcohol condensation, condensation of alcohols with olefins, hydration of olefins, hydrolysis of ethers, distillation, and combinations thereof;
- and
- (c) adding a sufficient amount of at least one component containing the at least one primary or secondary alkyl alcohol having at least four carbon atoms such that the distillate fuel blend composition has a lubricity as measured by ASTM D6078 at least about 225 grams higher than that of the highly paraffinic distillate fuel blend component and such that the distillate fuel blend composition has a molar ratio of olefins to alcohols of less than about 0.5.
1 more element
Dependencies are inferred from the claim text.