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:
Feb. 15, 1983
Filed:
Oct. 29, 1981
Robert A Farnham, San Rafael, CA (US);
Chevron Research Company, San Francisco, CA (US);
Abstract
In a radial flow catalytic reactor, a gravity supported centerpipe is restrained from vertical upward movement due to thermal cycling of the catalyst and the reactor internals by forming the centerpipe to have uniform vertical and radial permeability in a frustoconical configuration. Gravity effect of the catalyst particles forming the bed act along the tapered side of the centerpipe. Additionally improved permeability to radial flow through the uniformly packed catalyst bed, independently of radial resistance to flow through the reactor due to pressure gradient between top and bottom of the vessel is achieved by compensation for differences in radial distance to the centerpipe from the upper portion to the lower portion of the catalyst bed by changes in the permeability of the tapered conical surface of the centerpipe. Uniformity of radial flow through the catalyst bed is assured by forming the conical portion of the centerpipe from rigid screen material so that reaction 'dead' spots do not develop adjacent to the centerpipe.