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:
Dec. 31, 2013
Filed:
Jun. 09, 2010
Manoj Yadav, Maharashtra, IN;
Sukumar Mandal, Maharashtra, IN;
Asit Kumar Das, Maharashtra, IN;
Yogesh Gupta, Maharashtra, IN;
Minaz Makhania, Maharashtra, IN;
Gobind Tulsi, Maharashtra, IN;
Shailendra Arora, Maharashtra, IN;
Shubhangi Jaguste, Maharashtra, IN;
Manoj Yadav, Maharashtra, IN;
Sukumar Mandal, Maharashtra, IN;
Asit Kumar Das, Maharashtra, IN;
Yogesh Gupta, Maharashtra, IN;
Minaz Makhania, Maharashtra, IN;
Gobind Tulsi, Maharashtra, IN;
Shailendra Arora, Maharashtra, IN;
Shubhangi Jaguste, Maharashtra, IN;
Reliance Industries Limited, Navi Mumbai, IN;
Abstract
A process is disclosed for enhanced recovery of propylene and LPG from the fuel gas produced in Fluid catalytic cracking unit by contacting a heavier hydrocarbon feed with FCC catalyst. In the conventional process, the product mixture from FCC main column overhead comprising naphtha, LPG and fuel gas, are first condensed and gravity separated to produce unstabilized naphtha, which is subsequently used in the absorber to absorb propylene and LPG from fuel gas. However, the recovery of propylene beyond 97 wt % is difficult in this process since unstabilized naphtha already contains propylene of 5 mol % or above. In the present invention, Cand lighter components from unstabilized naphtha are first stripped off in a separate column to obtain a liquid fraction almost free from propylene (<0.1 mol %) and other LPG components. Such a stripped liquid fraction, after cooling to 20° C. to 30° C., is used in the absorber to absorb higher amounts of propylene and LPG from fuel gas, leading to improved recovery of propylene.