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. 28, 1986
Filed:
Dec. 24, 1984
Arthur R Greenwood, Niles, IL (US);
UOP Inc., Des Plaines, IL (US);
Abstract
Apparatus for transferring particulate contact material by gravity from an upper contact zone wherein it is contacted by a first gas flowing radially, to a lower zone wherein it is contacted by a second gas flowing upwardly. The apparatus includes a generally annular transition zone which connects the upper and lower zones. The transition zone effectively isolates the second gas from contacting the particulate material in the upper zone. In a preferred embodiment in the form of a catalyst regenerator, catalyst particles can be sampled for carbon level in the transition zone to determine if the carbon burn-off therefrom is sufficiently complete in an upper radial flow regenerator bed by contact with a first gas, having a relatively low oxygen level. The sampling can be done on stream, even though a second gas, such as relatively oxygen-rich halogenation gas, is passing up through the catalyst in the lower zone.