ANTIOXIDANT ADDITIVE COMPOSITION, SOLUTION THEREOF AND METHOD OF INCREASING STORAGE STABILITY OF BIODIESEL FUEL (VERSIONS) Russian patent published in 2013 - IPC C10L1/183 C10L10/00 

FIELD: chemistry.

SUBSTANCE: antioxidant additive composition is a mixture comprising, wt %: 2,6- di-tert-butyl-4-methylcyclohexanone 0.2-0.3; 2,6-di-tert-butylphenol 0.7-6.0; 2-sec-butyl-6-tert-butyl-p-cresol 1.5-5.0; 4,6-di-tert-butyl-o-cresol 3.0-8.0; 2,4-di-tert-butylphenol 0.3-0.5; 2,4-di-tert-butyl-6-(dimethylminomethyl)phenol 2.0-5.0; 4,4-methylene-bis(2,6-di-tert-butyl-phenol) 0.1-0.3; 2,6-di-tert-butyl-4-methylphenol - the balance. The method of increasing storage stability of biodiesel fuel involves preparation of a solution of the additive composition with said make-up in biodiesel fuel with additive concentration of 6-48 wt %; adding the solution of the composition to the biodiesel fuel to reach concentration of 0.002-1.6 wt % of the composition with respect to the entire solution of the biodiesel fuel.

EFFECT: considerable improvement in the storage stability of biodiesel fuel with reduced amount of the antioxidant additive used, preventing precipitation during the shelf life of biodiesel fuel for a longer period of time.

4 cl, 2 dwg, 4 tbl, 11 ex