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. 22, 1997
Filed:
Oct. 28, 1991
George A Hadjigeorge, Sugar Land, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
An improved riser reactor containing a plurality of substantially vertically oriented venturis connected in series whereby the venturis have a maximum diameter, D.sub.1, and a minimum diameter, D.sub.2 ; and, apparatus for connecting the venturis end to end in which the cross-sectional area of the venturis at D.sub.1 is A.sub.1 and the cross sectional area at D.sub.2 is A.sub.2 and the ratio of A.sub.1 /A.sub.2 is between about 1.1 and about 113, preferably between about 2 and about 100, most preferably between about 5 and about 50. The present invention also includes a process for catalytic cracking of a liquid hydrocarbon feed by use of the riser reactor of this invention.