Petroleo Brasileiro S.a. - Petrobras

Rogerio Oddone

Jefferson Roberto Gomes

Rafael Menegassi De Almeida

Marcelo Edral Pacheco

Marcus Vinicius Eiffle Duarte

Raissa Maria Cotta Ferreira Da Silva

Nelmo Furtado Fernandes

Adriana De Souza Ferreira

Giane Ribeiro Stuart

Adriana Ferreira De Souza

A process is described for hydroconversion of a mixture of organic oils of different origins in a conventional hydrotreatment unit, constituted by at least two catalyst beds, under moderately severe process conditions to obtain diesel fuel oil. The process includes injection of a stream of oil of animal or plant origin, with independently adjusted flow rates, from the second catalyst bed of the hydrotreatment unit onwards, in accordance with the variations in temperature observed in each of the catalyst beds after the first bed. The process is applicable to conventional hydrotreatment units, and makes it possible to overcome the effects of the highly exothermic nature of hydroconversion reactions in oils of animal and/or plant origin in hydrotreatment process for obtaining specified diesel fuel oil.

Process for hydroconversion of a mixture of organic oils of different origins

A process for the selective hydrodesulfurization of a naphtha containing olefins and organosulfur compounds is disclosed, which minimizes the hydrogenation of the olefins and results in a product with a low sulfur content. The process involves a two-stage hydrodesulfurization with HS removed from the first stage effluent. A flow of hydrogen and at least one added non-reactive compound is fed into the first stage, wherein the Hmolar fraction ranges from 0.2 to 1.0, and with HS at the reactor intake limited to a maximum of 0.1% by volume. The second stage involves a feedstream of hydrogen and at least one added non-reactive compound, wherein the Hmolar fraction ranges from 0.2 to 0.7 and with HS at the reactor intake limited to a maximum of 0.05% by volume.

Process for selective hydrodesulfurization of naphtha

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Rio de Janeiro, Brazil

Rogerio Oddone