ANTIOXIDANT ADDITIVE FOR BIODIESEL FUEL Russian patent published in 2011 - IPC C10L1/14 C10L1/02 C10L1/223 C10L1/183 

FIELD: chemistry.

SUBSTANCE: composition contains biodiesel fuel and an antioxidant effective amount of a mixture of at least one aromatic diamine and at least one sterically hindered phenol. The aromatic diamines are selected from a group consisting of N-(1,4-dimethylbutyl)-N'-phenyl-p-phenylene diamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylene diamine and N,N'-di-fluoro-butyl-p- phenylene diamine. The sterically hindered phenols are selected from a group consisting of 2,4-di-methyl-6-tert-butylphenol, 2-methyl-6-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol and 1,2,3-trihydroxybenzene. The weight ratio of the aromatic diamine to the sterically hindered phenol is approximately equal to 1:1.

EFFECT: mixture of aromatic diamines and sterically hindered phenols has synergetic antioxidant activity in biodiesel fuel and actively stabilises biodiesel fuel against oxidative degradation and formation of deposits.

17 cl, 3 dwg, 3 ex