Lubricity and conductivity improver additive for ultra low sulfur diesel fuels

A process for the preparation of a reaction product, comprising the steps of:

• i) stirring a fatty acid composition containing a mixture of fatty acids of carbon atoms C12-24 in the range of 60-95% wt/wt at 25-30° C.;
• ii) adding a glycerol carboxylate in the range of 1.0-10.0% wt/wt at 25° C.-30° C. in 30 minutes under continuous stirring;
• iii) adding phenol derivative compound in the range of 1.0-10.0% wt/wt at 25-30° C. under continuous stirring and continue the stirring for another 20 minutes;
• iv) heating the above reaction mixture at 50° C. and stirring continued for one hour;
• v) adding a mixture of polysulfone in the range of 0.1-5.0% wt/wt, polyamine mixture in the range of 0.1-5.0% wt/wt, and alkylated benzene sulfonic acid in the range of 0.1-5.0% wt/wt, prepared in diluent in the range of 0.5-5.0% wt/wt to the reaction mass obtained in step iv);
• vi) heating and stirring the mixture obtained after step v) at 50° C. to obtain the reaction product.