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:
Mar. 07, 1989
Filed:
Nov. 02, 1984
James H Haddad, Princeton Junction, NJ (US);
Hartley Owen, Belle Mead, NJ (US);
Klaus W Schatz, Skillman, NJ (US);
Mobil Oil Corp., New York, NY (US);
Abstract
Disclosed is a method of and apparatus for reducing the level of extremely small catalyst particles ('fines') in an FCC system by temporarily retaining particles separated from the secondary cyclone separator in a reactor vessel or catalyst regenerator. These particles can be intermittently withdrawn from the temporary retaining area in order to achieve particle flow at a low volume rate, which takes them out of the active catalyst inventory within the reactor/regenerator system. The intermittent withdrawing of catalyst 'fines']reduces the particulate contamination both in flue gas exhausted to the atmosphere from the catalyst regenreator and in the main column bottom (MCB) produces from the fractionation stage. Preferred embodiments include intermittent withdrawal of 'fines' from either the regenerator or the reactor vessels and the secondary cyclones contained in each of these vessels.