The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
Nov. 21, 2006
Rafael Menegassi DE Almeida, Rio de Janeiro, BR;
Jefferson Roberto Gomes, Rio de Janeiro, BR;
Guilherme Luis Monteiro DE Souza, Niteroi, BR;
Joy Leslie, Legal Representative, Niteroi, BR;
Xiaondong HU, Louisville, KY (US);
Rafael Menegassi De Almeida, Rio de Janeiro, BR;
Jefferson Roberto Gomes, Rio de Janeiro, BR;
Guilherme Luis Monteiro De Souza, Niteroi, BR;
Joy Leslie, legal representative, Niteroi, BR;
Xiaondong Hu, Louisville, KY (US);
Petroleo Brasileiro S.A.-Petrobras, Rio De Janerio, BR;
Abstract
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.