Patent ID: 11912950
Assignee: BASF SE
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A method for preparing a gasoline fuel composition, comprising:
adding to gasoline, a salt or a purified form thereof of a hydrocarbyl-substituted polycarboxylic acid and a hydrocarbyl epoxide quaternized nitrogen compound obtained by reaction of an amino alkanol of formula (13) with a quaternizing agent of formula (14) to obtain a quaternized nitrogen compound of formula (12a), formula (12b) or a mixture thereof according to Eq. (1); wherein the reaction with the quaternizing agent is in the presence of a free hydrocarbyl-substituted polycarboxylic acid of formula (11);, wherein
R5 is H or an aliphatic or aromatic radical comprising 1 to 10 carbon atoms,
R1 is a long-chain hydrocarbyl having a number-average molecular weight (Mn) of 85 to 20,000, or is a polyalkylene radical having a degree of polymerization of 2 to 100; and
R is H or a radical CH2CH(R5)OH or a radical CH(R5)CH2OH;
R6 and R7 are the same or different and are each alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl, aminoalkyl or aminoalkenyl, or R6 and R7 together are alkylene, oxyalkylene or aminoalkylene; and
A is a straight-chain or branched alkylene or alkenylene radical optionally interrupted by one or more heteroatoms;
wherein addition of the reaction product reduces the level of deposits in an intake system of a gasoline engine.