US2003000131A1PendingUtilityA1

Composition

31
Priority: Mar 26, 2001Filed: Mar 25, 2002Published: Jan 2, 2003
Est. expiryMar 26, 2021(expired)· nominal 20-yr term from priority
Inventors:Cyrus HenryDavid PinchAndrea Sneddon
C10L 1/232C10L 1/2387C10L 1/238C10L 1/224C10L 1/2225C10L 1/2222C10L 1/2283C10L 1/2383C10L 1/1852C10L 10/04C10L 1/1832
31
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

The present invention provides a composition comprising (i) an aviation fuel; and (ii) a deposit inhibiting compound of the formula P-Q-R in which P is a polymeric hydrocarbyl group in which Q is an optional ring system; in which R is a group selected from H and hydrocarbyl; wherein if R is a hydrocarbyl group it is free of a carboxylic acid group (—COOH); wherein Q together with R contains no greater than 2 nitrogens; and wherein when Q together with R contains 2 nitrogens each of the nitrogens is a member of a heterocyclic ring

Claims

exact text as granted — not AI-modified
1 . A composition comprising 
 (i) an aviation fuel; and    (ii) a deposit inhibiting compound of the formula I    P-Q-R   (I)    in which P is a polymeric hydrocarbyl group    in which Q is an optional ring system;    in which R is a group selected from H and hydrocarbyl;    wherein if R is a hydrocarbyl group it is free of a carboxylic acid group (—COOH);    wherein Q together with R contains no greater than 2 nitrogens; and    wherein when Q together with R contains 2 nitrogens each of the nitrogens is a member of a heterocyclic ring.    
     
     
         2 . A composition according to  claim 1  wherein Q together with R contains no greater than 1 nitrogen.  
     
     
         3 . A composition according to  claim 1  or  2  wherein Q together with R contains no greater than 1 basic nitrogen.  
     
     
         4 . A composition according to any one of the preceding claims wherein if R is a hydrocarbyl group it is free of a hydroxyl group (—OH).  
     
     
         5 . A composition according to any one of the preceding claims wherein the optional ring system Q is present.  
     
     
         6 . A composition according to any one of the preceding claims wherein Q is substituted.  
     
     
         7 . A composition according to any one of the preceding claims wherein Q is substituted with one or more groups selected from ═O and —OH  
     
     
         8 . A composition according to any one of the preceding claims wherein Q is an aromatic ring.  
     
     
         9 . A composition according to any one of the preceding claims wherein Q has from 4 to 10 members.  
     
     
         10 . A composition according to any one of the preceding claims wherein Q has from 4 to 6 members.  
     
     
         11 . A composition according to any one of the preceding claims wherein Q has 5 or 6 members.  
     
     
         12 . A composition according to any one of the preceding claims wherein Q is a carbon ring or a heterocyclic ring containing carbon and one nitrogen.  
     
     
         13 . A composition according to any one of the preceding claims wherein Q is selected from a ring system of the formula  
       
         
           
           
               
               
           
         
       
       wherein Z is C or N.  
     
     
         14 . A composition according to any one of the preceding claims wherein Q is selected from a ring system of the formula  
       
         
           
           
               
               
           
         
       
     
     
         15 . A composition according to any one of the preceding claims wherein P is a hydrocarbyl group having from 10 to 200 carbons.  
     
     
         16 . A composition according to any one of the preceding claims wherein P is a branched or straight chain alkyl group.  
     
     
         17 . A composition according to any one of the preceding claims wherein P is a branched alkyl group.  
     
     
         18 . A composition according to any one of the preceding claims wherein P is polyisobutene.  
     
     
         19 . A composition according to any one of the preceding claims wherein P has a molecular weight of from 700 to 2300.  
     
     
         20 . A composition according to any one of the preceding claims wherein P is polyisobutene having a molecular weight of from 800 to 1200.  
     
     
         21 . A composition according to any one of the preceding claims wherein the deposit inhibiting compound is selected from compounds of the formulae  
       
         
           
           
               
               
           
         
       
       wherein PIB is polyisobutene.  
     
     
         22 . A composition according to  claim 21  wherein PIB is polyisobutene having a molecular weight of from 800 to 1000.  
     
     
         23 . A composition according to any one of the preceding claims wherein the aviation is a jet fuel.  
     
     
         24 . A composition according to any one of the preceding claims wherein the fuel is JP-8 aviation fuel.  
     
     
         25 . A method for inhibiting deposition formation in a fuel at a temperature of from 100 to 335° C., the method comprising combining with the fuel a deposit inhibiting compound of the formula I  
       P-Q-R   (I)  
       in which P is a polymeric hydrocarbyl group; in which Q is an optional ring system; in which R is a group selected from H and hydrocarbyl; wherein if R is a hydrocarbyl group it is free of a carboxylic acid group (—COOH); wherein Q together with R contains no greater than 2 nitrogens; and wherein when Q together with R contains 2 nitrogens each of the nitrogens is a member of a heterocyclic ring.  
     
     
         26 . A method according to  claim 25  wherein the deposit inhibiting compound is a defined in any one of  claims 2  to  22 .  
     
     
         27 . A method according to  claim 25  or  26  wherein the fuel is an aviation fuel.  
     
     
         28 . Use of a deposit inhibiting compound as defined in any one of  claims 1  to  22  for 
 (i) the inhibition of deposit formation in a composition comprising the compound and a fuel; and/or  
 (ii) the inhibition of particle formation from the oxidation product(s) of a fuel; and/or  
 (iii) the solubilisation of deposits and/or deposit precursors  
 
     
     
         29 . A use according to  claim 28  wherein the fuel is an aviation fuel.  
     
     
         30 . A fuel composition as substantially herein before described with reference to any one of the Examples.  
     
     
         31 . A use as substantially herein before described with reference to any one of the Examples.  
     
     
         32 . A use as substantially herein before described with reference to any one of the Examples.

Join the waitlist — get patent alerts

Track US2003000131A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.