US2003150153A1PendingUtilityA1
Method
Priority: Nov 2, 2001Filed: Nov 1, 2002Published: Aug 14, 2003
Est. expiryNov 2, 2021(expired)· nominal 20-yr term from priority
C10L 1/223C10L 1/2425C10L 1/1832C10L 1/265C10L 10/04C10L 1/2383C10L 1/2608C10L 1/1855C10L 1/143C10L 1/2616C10L 1/2412C10L 1/2633C10L 1/2283C10L 1/238C10L 1/19C10L 1/2641
32
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
The present invention provides a method for inhibiting deposit formation in a fuel at a temperature of from 100 to 335° C., the method comprising combining with the fuel a composition comprising: (i) high temperature antioxidant; and (ii) a deposit inhibiting compound.
Claims
exact text as granted — not AI-modified1 . A method for inhibiting deposit formation in a fuel at a temperature of from 100 to 335° C., the method comprising combining with the fuel a composition comprising:
(i) high temperature antioxidant; and
(ii) a deposit inhibiting compound
2 . A method according to claim 1 wherein the high temperature antioxidant is a phosphorus-containing antioxidant.
3 . A composition comprising:
(i) a phosphorus-containing antioxidant; and (ii) a deposit inhibiting compound
4 . The invention according to claim 2 or 3 wherein the phosphorus-containing antioxidant is an organophosphorus-containing antioxidant.
5 . The invention according to claim 2 , 3 or 4 wherein the phosphorus-containing antioxidant is or is derived from an organophosphorus acid.
6 . The invention according to any one of claims 2 to 5 wherein the phosphorus-containing antioxidant is or is derived from an ester of an organophosphorus acid.
7 . The invention according to any one of claims 2 to 6 wherein the organophosphorus acid is selected from phosphorus acid, phosphonous acid, phosphinous acid, phosphoric acid, phosphonic acid or phosphinic acid.
8 . The invention according to claim 7 wherein the phosphorus-containing antioxidant is an ester of organophosphorus acid selected from phosphorus acid, phosphonous acid, phosphinous acid, phosphoric acid, phosphonic acid or phosphinic acid.
9 . The invention according to claim 8 wherein the phosphorus-containing antioxidant is an ester of a phosphonic acid.
10 . The invention according to any one of claims 2 to 9 wherein the phosphorus-containing antioxidant is a compound of Formula I or II:
wherein R 1 , R 2 and R 3 are independently selected from H and hydrocarbyl; and X, Y, and Z are independently selected from O and S.
11 . The invention according to claim 10 wherein at least one of X, Y or Z is O.
12 . The invention according to claim 8 or 9 wherein at least one of Y and Z is O.
13 . The invention according to claim 10 , 11 or 12 wherein X is S or O, Y is O and Z is O.
14 . The invention according to any one of claims 10 to 13 wherein each of X, Y and Z is O.
15 . The invention according to claim 10 or 11 wherein at least one of X, Y or Z is O and wherein at least one of X, Y or Z is S.
16 . The invention according to any one of claims 10 to 15 wherein R 1 is selected from H and hydrocarbon.
17 . The invention according to any one of claims 10 to 16 wherein R 1 is selected from H and C1-15 alkyl.
18 . The invention according to any one of claims 10 to 17 wherein R 1 is H.
19 . The invention according to any one of claims 10 to 18 wherein R 2 and R 3 are independently selected from H and hydrocarbon groups having from 1 to 50 carbons.
20 . The invention according to claim 19 wherein R 2 and R 3 are independently selected from H and hydrocarbon groups having from 1 to 25 carbons.
21 . The invention according to claim 19 wherein R 2 and R 3 are independently selected from H and straight chain alkyl groups having from 1 to 25 carbons.
22 . The invention according to claim 19 wherein R 2 and R 3 are independently straight chain alkyl groups having from 10 to 15 carbons.
23 . The invention according to any one of claims 2 to 22 wherein the phosphorus-containing antioxidant is a compound of Formula l:
wherein R 1 , R 2 and R 3 are independently selected from H and hydrocarbyl; and X, Y, and Z are independently selected from O and S.
23 . The invention according to claim 23 wherein the antioxidant is of the formula
24 . The invention according to any one of claims 2 to 22 wherein the phosphorus-containing antioxidant is a compound of Formula II:
wherein R 1 , R 2 and R 3 are independently selected from H and hydrocarbyl; and X, Y, and Z are independently selected from O and S.
25 . The invention according to claim 24 wherein the antioxidant is tridodecylphosphite.
26 . The invention according to any one of claims 1 to 25 wherein the deposit inhibiting compound is of Formula II
Polymer-Q-R (II)
wherein Polymer is a polymeric hydrocarbyl group;
wherein Q is an optional ring system; and
wherein R is a group selected from H and hydrocarbyl.
27 . The invention according to claim 26 wherein if R is a hydrocarbyl group it is free of a carboxylic acid group (—COOH).
28 . The invention according to claim 26 or 27 wherein Q together with R contains no greater than 2 nitrogens.
29 . The invention according to claim 26 , 27 or 28 wherein when Q together with R contains 2 nitrogens each of the nitrogens is a member of a heterocyclic ring.
30 . The invention according to any one of claims 26 to 29 wherein Q together with R contains only 2 nitrogens and wherein each of the nitrogens is a member of a heterocyclic ring.
31 . The invention according to claim 26 , 27 or 28 wherein Q together with R contains no greater than 1 nitrogen.
32 . The invention according to claim 31 wherein Q together with R contains no greater than 1 basic nitrogen.
33 . The invention according to any one of claims 26 to 32 wherein if R is a hydrocarbyl group it is free of a hydroxyl group (—OH).
34 . The invention according to any one of claims 26 to 33 wherein the optional ring system Q is present.
35 . The invention according to any one of claims 26 to 34 wherein Q is substituted, preferably Q is substituted with one or more groups selected from ═O and —OH.
36 . The invention according to any one of claims 26 to 35 wherein Q is an aromatic ring.
37 . The invention according to any one of claims 26 to 36 wherein Q has 4 to 10 members, preferably 4 to 6 members, preferably 5 or 6 members.
38 . The invention according to any one of claims 26 to 37 wherein Q is a carbon ring or a heterocyclic ring containing carbon and one nitrogen.
39 . The invention according to any one of claims 26 to 38 wherein Q is selected from a ring system of the formula
wherein A is C or N, preferably Q is selected from a ring system of the formula
40 . The invention according to any one of claims 26 to 39 wherein Polymer is a hydrocarbyl group having from 10 to 200 carbons.
41 . The invention according to any one of claims 26 to 40 wherein Polymer is a branched or straight chain alkyl group, preferably a branched alkyl group.
42 . The invention according to any one of claims 26 to 41 wherein Polymer is polyisobutene.
43 . The invention according to any one of claims 26 to 42 wherein Polymer has a molecular weight of from 700 to 2300, preferably 800 to 1200.
44 . The invention according to any one of the preceding claims wherein the deposit inhibiting compound is selected from compounds of the formulae
wherein PIB is polyisobutene.
45 . The invention according to claim 44 wherein PIB is polyisobutene having a molecular weight of from 1000 to 2300.
46 . The invention according to any one of the preceding claims wherein the composition further comprises a metal deactivator.
47 . The invention according to claim 46 wherein the metal deactivator is selected from N,N′-disalicylidene 1,2-propanediamine and N,N′-disalicylidene 1,2-cyclohexyldiamine.
48 . The invention according to any one of the preceding claims wherein the composition further comprises a further antioxidant.
49 . A fuel composition comprising
(a) a fuel (b) a composition as defined in any one of the preceding claims.
50 . A fuel composition according to claim 49 wherein the fuel is an aviation fuel.
51 . A fuel composition according to claim 49 or 50 wherein the fuel is JP-8 aviation fuel.
52 . Use of a composition as defined in any one of the preceding claims for
(i) the inhibition of oxidation of a fuel composition comprising the composition and a fuel; and/or (ii) the inhibition of deposit formation in a fuel composition comprising the composition and a fuel; and/or (iii) the inhibition of particle formation from the oxidation product(s) of a fuel; and/or (iv) the solubilisation of deposits and/or deposit precursors.
53 . A method as substantially herein before described with reference to any one of the Examples.
54 . A composition as substantially herein before described with reference to any one of the Examples.
55 . A fuel composition as substantially herein before described with reference to any one of the Examples.
56 . A use as substantially herein before described with reference to any one of the Examples.Join the waitlist — get patent alerts
Track US2003150153A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.