Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.
Type:
Grant
Filed:
October 20, 2017
Date of Patent:
February 4, 2020
Assignee:
ExxonMobil Reseach and Engineering Company
Inventors:
Eugine Choi, Matthew W. Boland, Zhisheng Gao, Luca Salvi, Shamel Merchant, Bruce W. Crawley
Abstract: A CO2 amine scrubbing process uses an absorbent mixture combination of an amine containing a primary amino group CO2 sorbent in combination with a non-nucleophilic relatively stronger base. The weaker base(s) are nucleophilic and have the ability to react directly with the CO2 in the gas stream while the relatively stronger bases act as non-nucleophilic promoters for the reaction between the CO2 and the weaker base. Two moles of CO2 can be taken up by the primary amine groups in a dicarboxylation reaction, affording the potential for a highly efficient scrubbing process.
Type:
Grant
Filed:
September 9, 2011
Date of Patent:
May 12, 2015
Assignee:
Exxonmobil Reseach and Engineering Company
Inventors:
Pavel Kortunov, Lisa S. Baugh, David C. Calabro, Michael Siskin
Abstract: The electrodesulfurization of heavy oils wherein a feedstream comprised of bitumen or heavy oil is conducted, along with an effective amount of hydrogen, to an electrochemical cell. A current is applied to the cell wherein sulfur from the feedstream combines with hydrogen to form hydrogen sulfide which is removed.
Type:
Grant
Filed:
October 21, 2008
Date of Patent:
December 13, 2011
Assignee:
ExxonMobil Reseach and Engineering Company
Inventors:
Mark A. Greaney, Chris A. Wright, Jonathan M. McConnachie, Howard Freund, Kun Wang
Abstract: The present invention is an improvement to two-dimensional comprehensive gas chromatography. The improvement is a two-valve switching modulator connecting two gas chromatography separation columns. The modulator is located between the first and second columns and includes two valves with transfer lines between the valves for switching a carrier gas between the transfer lines.
Type:
Grant
Filed:
March 9, 2007
Date of Patent:
August 24, 2010
Assignee:
ExxonMobil Reseach and Engineering Company