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:
Jan. 13, 2004
Filed:
Sep. 17, 2001
Montri Vichailak, Sugar Land, TX (US);
Bertrand Klussman, Houston, TX (US);
Mario J. Maraschino, Houston, TX (US);
Catalytic Distillation Technologies, Pasadena, TX (US);
Abstract
A process for the desulfurization of a light boiling range (C -350° F.) fluid catalytically cracked naphtha, which may be first subjected to a thioetherification to react the diolefins with mercaptans contained in it to form sulfides, is fed to a high pressure (>250 psig) catalytic distillation hydrodesulfurization step along with hydrogen under conditions to react most of the organic sulfur compounds, including sulfides from the thioetherification to form H S. The H S and a light product stream (C 's and C 's) are removed as overheads. The bottoms from the catalytic distillation hydrodesulfurization step is fractionated and the bottoms from the fractionation contacted with hydrogen in a straight pass hydrogenation step in the presence of a hydrodesulfurization catalyst at pressure of >250 and temperature >400° F. to further reduce the sulfur content.