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:
Sep. 08, 1987
Filed:
Feb. 10, 1984
Wesley A Parker, Houston, TX (US);
Thomas S Dewitz, Houston, TX (US);
George P Hinds, Jr, Houston, TX (US);
John E Gwyn, Katy, TX (US);
A Haluk Bilgic, Houston, TX (US);
Donald E Hardesty, La Porte, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
Catalyst and hydrocarbon vapors are separated in a cyclone zone attached to the discharge of a riser cracking operation. A vortex stabilizer separating the cyclone zone from a stripping zone allows stripping gas from the stripping zone to be passed upwardly into the cyclone zone countercurrent to the downward flow of catalyst, thereby improving the separation and stripping of gaseous hydrocarbons from separated catalyst. The combined cyclone-stripping zone reduces catalyst hydrocarbon contact time, thereby improving gasoline yield and olefin content, decreasing gas make, and reducing coke deposits.