Innospec Limited

Alan Norman Ross

Katherine Le Manquais

Matthew Petts

Martin Roberts

Jacqueline Reid

Adele Cross

Ian Malcolm McRobbie

Colin Snape

Michael James Simms

Nigel John Broom

James Barker

Alexander Smith

Victoria Pellegrini

A fuel composition comprising as an additive the reaction product of a polycarboxylic acid having no more than 5 carbon atoms per carboxylic acid group, or an anhydride thereof and an alcohol having at least 5 carbon atoms.

Compositions and methods and uses relating thereto

A method of cleaning up internal diesel injector deposits in a severely fouled engine, the method including combusting in the engine a diesel fuel composition having (a) a quaternary ammonium salt additive; and (b) one or more further nitrogen-containing detergents; in which the quaternary ammonium salt additive includes the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which includes a tertiary amine group; in which each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.

Fuel compositions

A method of cleaning up deposits in an indirect injection diesel engine, the method including combusting in the engine a diesel fuel composition having a quaternary ammonium salt additive; and optionally one or more further nitrogen-containing detergents; wherein the quaternary ammonium salt additive comprises the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which includes a tertiary amine group; wherein each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.

Methods and uses relating to fuel compositions

A fuel composition comprising as an additive the reaction product of a polycarboxylic acid compound of formula (I): (I) or an anhydride thereof; and an alcohol having at least 5 carbon atoms; wherein each of n and m may be 0 or a positive integer.

A diesel fuel composition comprising as an additive an ester compound which is the reaction product of an optionally substituted polycarboxylic acid or an anhydride thereof and a polyhydric alcohol of formula H&#x2014;(OR)&#x2014;OH, wherein R is an optionally substituted alkylene group and n is at least 1.

A quaternary ammonium compound of formula (I): wherein R, R, Rand Ris each independently an optionally substituted hydrocarbyl group, X is a linking group, Ris an optionally substituted alkylene group, Ris hydrogen or an optionally substituted alkyl, alkenyl or aryl group, and n is 0 or a positive integer, provided that n is not 0 when Ris hydrogen.

A quaternary ammonium compound of formula (I): wherein R, R, Rand Ris each independently an optionally substituted hydrocarbyl group; X is a linking group; Ris an optionally substituted alkylene group; n is a positive integer; W is Oor OH; b is 1 when W is OH, and b is 2 when W is O. 

Quaternary ammonium compound and fuel composition

A quaternary ammonium salt of formula (I): (I) where in X is a linking group; Y is O, NH or NRwherein Ris H or an optionally substituted hydrocarbyl group; Qis a moiety that includes a quaternary ammonium cation; Ais an anion; Ris an optionally substituted alkylene group; Ris hydrogen or an optionally substituted hydrocarbyl group; and n is 0 or a positive integer; provided that n is not 0 when Ris hydrogen. 

Composition and methods and uses relating thereto

A quaternary ammonium compound of formula (I): (I) wherein R, R, Rand Ris each independently an optionally substituted hydrocarbyl group, X is a linking group, Ris an optionally substituted alkylene group, R5 is hydrogen or an optionally substituted alkyl, alkenyl or aryl group, and n is 0 or a positive integer, provided that n is not 0 when R5 is hydrogen. 

Composition, method and use

A gasoline fuel composition comprising as an additive an ester compound which is the reaction product of an optionally substituted polycarboxylic acid or an anhydride thereof and an alcohol or formula H&#x2014;(OR)&#x2014;OR, wherein R is an optionally substituted alkylene group; Ris hydrogen or an optionally substituted hydrocarbyl group, and n is 0 or a positive integer; wherein n is not O when Ris hydrogen.

Fuel compositions, methods and uses relating to quaternary ammonium salt additives for fuel used in spark ignition engines

A diesel fuel composition comprising as an additive an ester compound which is the reaction product of an optionally substituted polycarboxylic acid or an anhydride thereof and an alcohol or formula ROH, wherein R is an optionally substituted hydrocarbyl group.

Methods and uses for improving the performance of diesel engines using fuel additives

A diesel fuel composition comprising as an additive an ester compound which is the reaction product of an optionally substituted polycarboxylic acid or an anhydride thereof and a compound or formula H&#x2014;(OR)&#x2014;OR, wherein R is an optionally substituted alkylene group, Ris an optionally substituted hydrocarbyl group and n is at least 1.

Method and use

A diesel fuel composition comprising as an additive an ester compound which is the reaction product of a polyhydric alcohol of formula H&#x2014;(OR)&#x2014;OH and at least 1.5 molar equivalents of an optionally substituted polycarboxylic acid or an anhydride thereof, wherein R is an optionally substituted alkylene group and n is at least 1.

A quaternary ammonium salt of formula (I): wherein X is a linking group; Y is O, NH or NRwherein Ris H or an optionally substituted hydrocarbyl group; Qis a moiety that includes a quaternary ammonium cation; Ais an anion; Ris an optionally substituted alkylene group; Ris hydrogen or an optionally substituted hydrocarbyl group; and n is 0 or a positive integer; provided that n is not 0 when Ris hydrogen. 

Growing community of inventors

Wigan, United Kingdom

Alan Norman Ross