Petroleo Brasileiro S.a. - Petrobras

Xiaondong Hu

Rafael Menegassi De Almeida

Guilherme Luis Monteiro De Souza

Jefferson Roberto Gomes

Carlos René Klotz Rabello

Marcus Vinicius Eiffle Duarte

Joyce Leslie, Legal Representative

Joy Leslie, Legal Representative

The present invention relates to a process for removing organic silicon compounds from hydrocarbon streams by contact with an adsorbent and hydrogen. The adsorbent is composed of lamellar double hydroxides and group VI-B or group VIII hydrogenating metal. More specifically, the process of the present invention involves a stage of activation for formation of the lamellar double hydroxide, and maintaining the phase of lamellar double hydroxide by adding water.

Process for removing silicon compounds from hydrocarbon streams

A process for the selective hydrodesulfurization of naphtha streams containing olefins and organosulfur compounds that minimizes olefin hydrogenation and results in a reduced sulfur content product. This is attained by two-stage hydrodesulfurization and HS removal from the first stage effluent, with the first reaction stage catalyst being a more active HDS catalyst than the second reaction stage catalyst. Hydrogen and a non-reactive compound are fed to the first stage, with the Hmole fraction in the mixture of Hand non-reactive compound being from 0.2 to 1.0. HS at the reactor inlet is limited to not more than 0.1% by volume. Hydrogen and a non-reactive compound are fed to the second reaction stage, the Hmole fraction in the mixture of Hand non-reactive compound being from 0.2 to 0.7. HS at the reactor inlet is limited to not more than 0.05% by volume.

Process for the selective hydrodesulfurization of naphtha streams

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Louisville, KY, United States of America

Xiaondong Hu