▎ 摘　　要

NOVELTY - Nano-catalyst is constituted by an active phase comprising nickel, palladium and ruthenium, and dispersed on a support comprising graphene layers with a thickness of less than 1 mu m, where the outer surface of which is covered with surfactant chains, which selectively hydrogenate triglycerides and enrich oil in monounsatured cis-isomers, due to steric hindrances, and the active phase has a nickel/(palladium and ruthenium) ratio of 1-5 wt.%. USE - The nano-catalyst is used for process of vegetable oil hydrogenation for producing bio-lubricant or biodegradable plastic for producing copolymer (claimed). ADVANTAGE - The nano-catalyst allows several cycles of reuse without showing a significant loss of catalytic activity or deactivation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) the use of the nano-catalyst in a catalytic process of vegetable oil hydrogenation for producing biolubricant or biodegradable plastic for producing copolymer, where the final product comprises fat acids having a high percentage of cis-9-octadecenoic acid (cis-oleic acid), in order to reduce the formation of trans isomers of 9-octadecenoic acid (trans-oleic acid); and (2) a method for producing the nano-catalyst, which involves performing formation of a precursor of the active phase comprising nickel, palladium and ruthenium, performing formation of an activated complex between the precursor and the surfactant molecules determined by the interaction of the metal ions with the polar head of the surfactant, where the surfactant molecules are oleic acid, linoleic acid, stearic acid, lauric acid or thiols, and performing formation of micelles, in a non-polar medium, and the progressive aggregation and growth of nanoparticles comprising the activated complex, the surface of which is conjugated with the surfactant molecules, and the dispersion of the nano-particles thus obtained on a support consisting of graphene.