Mineral oils: processes and products – Chemical conversion of hydrocarbons – With prevention or removal of deleterious carbon...
Reexamination Certificate
2005-06-21
2005-06-21
Griffin, Walter D. (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
With prevention or removal of deleterious carbon...
C208S142000, C208S950000, C585S258000, C585S950000
Reexamination Certificate
active
06908543
ABSTRACT:
A method of minimizing the formation of polymers and other heavy molecular weight products upon heating of a hydrocarbon stream in a hydroconversion process is described. Specifically, sufficient hydrogen-containing gas is added to the hydrocarbon stream before heating to reduce its fouling tendency. The hydrogen-containing gas is added in an amount less than about 500 standard Cubic Feet per Barrel (SCFB). preferably less than about 100 SCFB and more preferably less than about 50 SCFB.
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Article “Enhance Hydroprocessor Efficiency and Reliability”, World Refining—Supplement to Mar. 2000, vol. 10, No. 2, pp. 12-15.
V. Kaiser, English translation abstract: Petrole et Techniques N. 406 58-61 (Jan.-Feb. 1997).
Burns Doane Swecker & Mathis L.L.P.
Chevron U.S.A. Inc.
Griffin Walter D.
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