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:
Nov. 06, 1990
Filed:
May. 22, 1989
Henry C Chan, Bellaire, TX (US);
Gary E Collier, Houston, TX (US);
Texaco Inc., White Plains, NY (US);
Abstract
In a fluid catalytic cracking process, coke is burned from spent catalyst at elevated temperature in a vertically arranged regenerator vessel. The regenerator vessel contains a lower, dense phase oxidation zone to which spent catalyst is introduced and an upper, dilute phase oxidation zone. Catalyst is fluidized and oxidized by means of air which is introduced in an amount of 5 vol % to 15 vol % to a lower air distributor at the bottom of the dense phase zone. Spent catalyst is discharged above the lower air distributor. The balance of the air is distributed in a horizontal plane in the dense phase above the catalyst discharge. As a result, a substantial proportion of the coke and carbon monoxide is burned in the dense phase zone at a lower temperature. A reduced amount of carbon monoxide is carried over to the dilute phase where higher temperature oxidation occurs.