C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
C10L 1/16 (2006.01) C10L 1/14 (2006.01) C10L 1/18 (2006.01) C10L 1/22 (2006.01)
Patent
CA 2214347
The invention relates to a method of improving the cold flow characteristics of a fuel oil, the method comprising adding to the fuel oil as a wax crystal modifier an additive composition comprising: (i) an oil soluble hydrogenated block butadiene polymer, the polymer comprising at least one crystallizable block, obtained by end-to-end polymerization of a linear butadiene and at least one non-crystallizable block, the non-crystallizable block being obtained by 1,2-configuration polymerization of a linear butadiene, and (ii) a fuel oil cold flow improver other than the hydrogenated block butadiene polymer as defined in (i), and said cold flow improver is a fuel oil cold flow improver selected from: (A) ethylene-unsaturated ester compounds, (B) comb polymers, (C) polar nitrogen compounds, (D) compounds comprising a ring system having at least two substituents comprising a linear or branched aliphatic hydrocarbylene group optionally interrupted by one or more hetero atoms and carrying a secondary amino group, the substituents on the amino groups each being a hydrocarbyl group containing 9 to 40 carbons, (E) polyoxyalkylene compounds, and (F) hydrocarbon polymers. The invention also relates to methods of improving cold flow characteristics of fuel oils by use of the additives and fuel oil compositions and concentrates containing the additives.
On utilise des copolymères séquencés hydrogénés en tant que constituant dans une composition d'additifs destinés à améliorer le fluage à froid du fuel-oil.
Fetters Lewis John
Goberdhan Dhanesh Gordon
Huang John
Lewtas Kenneth
Mcaleer Andrew Matthew
Borden Ladner Gervais Llp
Exxon Chemical Patents Inc.
Exxonmobil Chemical Patents Inc.
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