Title:
AN IMPROVED PROCESS FOR RECOVERY OF PROPYLENE AND LPG FROM FCC FUEL GAS USING STRIPPED MAIN COLUMN OVERHEAD DISTILLATE AS ABSORBER OIL
Document Type and Number:
WIPO Patent Application WO/2011/001445
Kind Code:
A3
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, C4 and 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 2O°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.
Inventors:
YADAV MANOJ (IN)
MANDAL SUKUMAR (NI)
DAS ASIT KUMAR (IN)
GUPTA YOGESH (IN)
MAKHANIA MINAZ (IN)
TULSI GOBIND (IN)
ARORA SHAILENDRA (IN)
JAGUSTE SHUBHANGI (IN)
MANDAL SUKUMAR (NI)
DAS ASIT KUMAR (IN)
GUPTA YOGESH (IN)
MAKHANIA MINAZ (IN)
TULSI GOBIND (IN)
ARORA SHAILENDRA (IN)
JAGUSTE SHUBHANGI (IN)
Application Number:
PCT/IN2010/000386
Publication Date:
March 31, 2011
Filing Date:
June 09, 2010
Export Citation:
Assignee:
RELIANCE IND LTD (IN)
YADAV MANOJ (IN)
MANDAL SUKUMAR (NI)
DAS ASIT KUMAR (IN)
GUPTA YOGESH (IN)
MAKHANIA MINAZ (IN)
TULSI GOBIND (IN)
ARORA SHAILENDRA (IN)
JAGUSTE SHUBHANGI (IN)
YADAV MANOJ (IN)
MANDAL SUKUMAR (NI)
DAS ASIT KUMAR (IN)
GUPTA YOGESH (IN)
MAKHANIA MINAZ (IN)
TULSI GOBIND (IN)
ARORA SHAILENDRA (IN)
JAGUSTE SHUBHANGI (IN)
International Classes:
C10G53/08
Domestic Patent References:
| WO2000075263A1 | 2000-12-14 |
Foreign References:
| US4831204A | 1989-05-16 |
Other References:
See also references of EP 2449059A4
Attorney, Agent or Firm:
SUBRAMANIAM, Hariharan et al. (Nataraj & AssociatesE-556, Greater Kailash-ll, New Delhi - 8, IN)
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