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:
Sep. 26, 1978
Filed:
Jun. 28, 1977
James Albert Frayer, Pittsburgh, PA (US);
Henri K Lese, Monroeville, PA (US);
Joel Drexler McKinney, Pittsburgh, PA (US);
Kirk J Metzger, Pittsburgh, PA (US);
John Angelo Paraskos, Pittsburgh, PA (US);
Gulf Research & Development Company, Pittsburgh, PA (US);
Abstract
An asphaltene-containing oil hydrodesulfurization process employing an upstream catalyst and a downstream catalyst in series. The downstream catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal in the form of particles whose surface is shaped by multiple elongated alternating grooves and protrusions. The upstream catalyst comprises Group VI and Group VIII metals without promotion with Group IV-B metal in the form of particles which may or may not be similarly shaped. Beds of the downstream and upstream catalyst may be diposed in the same or in different reactors. The adaptation of the grooved particle configuration to the promoted catalyst composition provided the early development of a plateau-like aging curve which was not achieved by the adaptation of the grooved shape to a non-promoted catalyst.