Fuel and related compositions – Liquid fuels – Inorganic component
Reexamination Certificate
2007-08-28
2007-08-28
Toomer, Cephia D. (Department: 1714)
Fuel and related compositions
Liquid fuels
Inorganic component
C044S459000, C210S728000, C585S820000, C585S823000
Reexamination Certificate
active
10795889
ABSTRACT:
The present application provides a method for removing drag reducer additive (“DRA”) from liquid hydrocarbon fuel. The method comprises: providing contaminated liquid hydrocarbon fuel comprising an initial concentration of DRA; contacting the contaminated liquid hydrocarbon fuel with a quantity of fresh attapulgus clay under conditions effective to produce decontaminated liquid hydrocarbon fuel comprising a reduced concentration of the DRA; said fresh attapulgus clay being effective to remove about 10% or more of a target DRA when 1 g of the fresh attapulgus clay is added in increments of from about 0.02 gram to about 0.1 gram, with agitation, to 100 ml. of contaminated liquid hydrocarbon fuel comprising from about 8 to about 9 ppm of the unsheared target DRA.
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Southwest Research Institute
The Morris Law Firm P.C.
Toomer Cephia D.
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