Patent ID: 9017430
Filing Date: 2015-04-28
Classification: C07C,C10L

Abstract:
1. A method of making a fuel additive comprising an alkanolamide, the method comprising: (a) adding diethanolamine (DEA) to a fatty acid at a rate of from 0.0001% of total DEA per minute to about 5% total DEA per minute to form a mixture of fatty acid and DEA wherein the total molar quantity of fatty acid in the mixture is in excess of the total molar quantity of DEA; (b) applying a vacuum to the mixture; and (c) maintaining the mixture at a temperature suitable for reacting the DEA with the fatty acid to form an alkanolamide and a bis-hydroxyethyl piperazine (BHEP) by-product while adding the DEA wherein the fuel additive contains less than 3000 part per million (ppm) of bis-hydroxyethyl piperazine (BHEP).