Integrated method for producing long-chain linear olefins and aviation kerosene by homogeneous metathesis

An integrated process for producing long-chain linear olefins and aviation biokerosene from homogeneous metathesis, comprising the following steps:

• (a) Subjecting the stream of fatty methyl esters obtained from the esterification of a vegetable oil to a step of Selective Hydrogenation of Esters using a specific catalyst with a low palladium content supported on alumina;
• (b) Pre-treating the stream of light olefins in the section of Contaminant Removal;
• (c) After removing the contaminants, directing the treated stream of light olefins to the section of Selective Hydrogenation of Light Olefins to transform dienes, if present, into their respective olefins;
• at the same time, drying the charge to increase the process yield;
• (d) After the respective treatments, the streams of fatty methyl esters of the charge and light olefins are mixed in appropriate proportions generating the feed stream of the Homogeneous Metathesis process, using a catalyst comprising a noble metal-based complex solubilized in organic solvent fed to the reactor;
• (e) Sending the effluent from the metathesis reactor to the section of Recovery of Light Olefins, where the stream of unreacted and recovered light olefins is recycled to the metathesis reactor;
• (f) Sending the stream containing the products formed in the metathesis to the section of Fractionation of Esters and Olefins to be separated and purified, where there are obtained 1-decene, a stream of C11-C14 linear olefins and a stream containing the C10-C14 methyl esters;
• (g) Sending the stream containing the C10-C14 methyl esters to be co-processed in the section of Co-processing of Esters with aviation kerosene (jet fuel) of fossil origin, in a hydrotreatment unit, in the presence of hydrogen.