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:
Apr. 11, 1989
Filed:
Aug. 06, 1987
James H Haddad, Princeton Junction, NJ (US);
Hartley Owen, Belle Mead, NJ (US);
Mobil Oil Corporation, New York, NY (US);
Abstract
A process and apparatus for mixing fluid catalytic cracking hydrocarbon feed and catalyst is disclosed. The invention passes lift gas through a first conduit which is axially aligned with a second conduit. A downstream end of the first conduit and an upstream end of the second conduit are located within a catalyst bed enclosed by a chamber. Furthermore, the second conduit axially injects catalyst and lift gas into an upstream end of an elongated fluid catalytic cracking riser while passing hydrocarbon feed into the riser through an annular zone about the upstream end of the riser. Preferably steam also passes through this annular zone. The process and apparatus achieves substantially uniform catalyst-to-oil ratio across a horizontal cross-section of the riser. A process and apparatus for control of the level of the catalyst bed in the enclosed chamber by employing a control gas stream is also disclosed.