US2005086856A1PendingUtilityA1
Composition
Priority: Aug 6, 2002Filed: Aug 5, 2003Published: Apr 28, 2005
Est. expiryAug 6, 2022(expired)· nominal 20-yr term from priority
C10L 1/198C10L 1/1835C10L 1/1981C10L 1/1832C10L 1/2283C10L 1/2225C10L 1/2608C10L 1/14
31
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Claims
Abstract
The present invention provides a jet fuel composition comprising (i) a jet fuel; (ii) a compound of Formula I wherein m is at least 1; wherein n is 0 or 1; wherein when m is 1, n is 0; wherein the or each R 1 is a hydrocarbyl group with the proviso that the or each R 1 is free of carboxylic acid and carboxylic ester groups; and wherein when m is 1, R 1 is a polymeric group comprising at least 12 carbon atoms.
Claims
exact text as granted — not AI-modified1 . A jet fuel composition comprising
(i) a jet fuel; and (ii) a compound of Formula I wherein m is at least 1; wherein n is 0 or 1; wherein when m is 1, n is 0; wherein the or each R 1 is a hydrocarbyl group with the proviso that the or each R 1 is free of carboxylic acid and carboxylic ester groups; and wherein when m is 1, R 1 is a polymeric group comprising at least 12 carbon atoms.
2 . A jet fuel composition according to claim 1 further comprising (iii) an antioxidant.
3 . A jet fuel composition according to claim 1 further comprising (iv) a metal deactivator.
4 . A jet fuel composition according to wherein m is 1.
5 . A jet fuel composition according to claim 1 wherein R 1 is a hydrocarbon group.
6 . A jet fuel composition according to claim 1 wherein R 1 is a linear or branched alkyl group.
7 . A jet fuel composition according to claim 1 wherein R 1 is a C 1 -C 200 group.
8 . A jet fuel composition according to claim 1 wherein R 1 is a C 10 -C 200 group.
9 . A jet fuel composition according to claim 1 wherein R 1 is a C 40 -C 180 group.
10 . A jet fuel composition according to claim 1 wherein R 1 is a branched alkyl group.
11 . A jet fuel composition according to claim 1 wherein R 1 is a polyalkenyl group.
12 . A jet fuel composition according to claim 1 wherein R 1 is polyisobutene (PIB).
13 . A jet fuel composition according to claim 1 wherein R 1 has a molecular weight of from 200 to 2500.
14 . A jet fuel composition according to claim 1 wherein R 1 has a molecular weight of 500 to 2500.
15 . A jet fuel composition according to claim 1 wherein R 1 has a molecular weight of approximately 750.
16 . A jet fuel composition according to claim 1 wherein R 1 has a molecular weight of approximately 1000.
17 . A jet fuel composition according to claim 1 wherein R 1 has a molecular weight of approximately 2300.
18 . A jet fuel composition according to claim 1 comprising
(i) a jet fuel (ii) a compound of Formula I wherein m is 1 and n is 0; wherein R 1 is a polyisobutene with a molecular weight of from 200 to 2500; (iii) an antioxidant; and (iv) a metal deactivator.
19 . A jet fuel composition according to claim 1 wherein m is greater than 1.
20 . A jet fuel composition according to claim 19 wherein R 1 is a hydrocarbon group.
21 . A jet fuel composition according to claim 19 wherein R 1 is a linear or branched alkyl group.
22 . A jet fuel composition according to claim 19 wherein R 1 is a C 1 -C 50 group.
23 . A jet fuel composition according to claim 19 wherein R 1 is a C 1 -C 25 group.
24 . A jet fuel composition according to claim 19 wherein R 1 is a C 5 -C 15 group.
25 . A jet fuel composition according to claim 19 wherein m is at least 4.
26 . A jet fuel composition according to claim 19 comprising
(i) a jet fuel (ii) a compound of Formula I wherein m is greater than 1 and n is 1; wherein each R 1 is a C 1 -C 50 hydrocarbyl group free of carboxylic acid and carboxylic ester groups. (iii) an antioxidant; and (iv) a metal deactivator.
27 . A jet fuel composition according to claim 18 wherein R 1 is para substituted relative to the OH group.
28 . A jet fuel composition according to claim 18 wherein the (CH 2 ) n group is ortho substituted relative to the OH group.
29 . A jet fuel composition according to claim 2 wherein the antioxidant is a hindered phenol antioxidant.
30 . A jet fuel composition according to claim 29 wherein the antioxidant is 2,6-di-t-butyl-4-methyl phenol (BHT).
31 . A jet fuel composition according to claim 2 wherein the antioxidant is a phosphonate.
32 . A jet fuel composition according to claim 31 wherein the antioxidant is dilauryl phosphonate.
33 . A jet fuel composition according to claim 3 wherein the metal deactivator is N,N′-disalicylidene 1,2-propanediamine.
34 . A jet fuel composition according to claim 1 wherein the compound of Formula I is present in an amount of 50-200 mg/L.
35 . A jet fuel composition according to claim 1 wherein the compound of Formula I is present in an amount of 80-120 mg/L.
36 . A jet fuel composition according to claim 2 wherein the antioxidant is present in an amount of 1-50 mg/L.
37 . A jet fuel composition according to claim 36 wherein the antioxidant is present in an amount of 1-30 mg/L.
38 . A jet fuel composition according to claim 3 wherein the metal deactivator is present in an amount of 0.05-10 mg/L.
39 . A jet fuel composition according to claim 38 wherein the metal deactivator is present in an amount of 0.5-5 mg/L.
40 . A jet fuel composition according to claim 1 wherein the compound of Formula I is a compound of Formula II
wherein the or each R 2 is an optional hydrocarbyl group with the proviso that the or each R 2 is free of carboxylic acid and carboxylic ester groups; and wherein m, n and R 1 are as defined in any one of the preceding claims.
41 . Use of a compound of Formula I as defined in claim 1 for the inhibition of oxidation of a jet fuel composition as defined in any one of the preceding claims.
42 . Use of a compound of Formula I as defined in claim 1 for the inhibition of deposit formation in a jet fuel composition as defined in any one of the preceding claims.
43 . Use of a compound of Formula I as defined in claim 1 for the inhibition of particulate formation from the oxidation product(s) of a jet fuel composition as defined in any one of the preceding claims.
44 . Use of a compound of Formula I as defined in claim 1 for the solubilisation of deposits and/or deposit precursors in a jet fuel composition as defined in any one of the preceding claims.
45 . A method for inhibiting deposit formation in a jet fuel at a temperature of from 100 to 335° C., the method comprising combining with the jet fuel a compound of Formula I
wherein m is at least 1;
wherein n is 0 or 1;
wherein when m is 1, n is 0;
wherein the or each R 1 is a hydrocarbyl group with the proviso that the or each R 1 is free of carboxylic acid and carboxylic ester groups; and
wherein when m is 1, R 1 is a polymeric group comprising at least 12 carbon atoms.
46 . (canceled)
47 . (canceled)
48 . (canceled)
49 . (canceled)Join the waitlist — get patent alerts
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