Patent ID: 9573905
Date: 2017-02-21
CPC Classifications: C05F,C07D,C23F,Y02A,Y02E,Y02W

Claim:
1. A process for producing imidazoline mixtures, by processing oil extracted from waste coffee grounds, characterized by the following general formula in the mixture of Imidazolines (I), where the R represents the hydrocarbonated chain of one of the following fatty acids contained in coffee oil:linoleic acid in higher proportion, palmitic acid, oleic acid and stearic acid, wherein the process comprises the following stages: a) extraction of ground coffee waste through a biphasic water-methanol-heptane or water-heptane extraction procedure, with the corresponding separation of the heptanic layer and the concentration to dryness under moderately reduced pressure between 100 and 200 mmHg, retrieving heptane to be reused and leaving the oil completely free of volatile components, a majority of the methanol used is recovered through the distillation of the aqueous layer, b) coffee oil is submitted to a transesterification process catalyzed with KOH, obtaining coffee biodiesel and glycerol, with the glycerol then being separated from the mixture through a decantation process in a tank; and c) the coffee biodiesel obtained is submitted to aminolysis procedure with aminoethylethanolamine (AEEA), heating to between 140 and 160° C. and a later heat cyclation process at the same temperature and 200 to 300 mmHg until removal of the stoichiometric amount of water, to produce a mixture of imidazolines of general formula (I).