Title:
PROCESS AND APPARATUS FOR REMOVING COKE FORMED DURING STEAM CRACKING OF HYDROCARBON FEEDSTOCKS CONTAINING RESIDS
Document Type and Number:
WIPO Patent Application WO2005113721
Kind Code:
A3
Abstract:
A process for decoking of a process that cracks hydrocarbon feedstock containing resid and coke precursors, wherein steam is added to the feedstock to form a mixture which is thereafter separated into a vapor phase and a liquid phase by flashing in a flash/separation vessel, separating and cracking the vapor phase, and recovering cracked product. Coking of internal surfaces in and proximally downstream of the vessel is controlled by interrupting the feed flow, purging the vessel with steam, introducing an air/steam mixture to at least partially combust the coke, and resuming the feed flow when sufficient coke has been removed. An apparatus for carrying out the process is also provided.
Inventors:
STELL RICHARD C (US)
DI NICOLANTONIO ARTHUR R (US)
FRYE JAMES M (US)
ANNAMALAI SUBRAMANIAN (US)
VIDONIC NICHOLAS G (US)
DI NICOLANTONIO ARTHUR R (US)
FRYE JAMES M (US)
ANNAMALAI SUBRAMANIAN (US)
VIDONIC NICHOLAS G (US)
Application Number:
PCT/US2005/017695
Publication Date:
January 26, 2006
Filing Date:
May 19, 2005
Export Citation:
Assignee:
EXXONMOBIL CHEM PATENTS INC (US)
STELL RICHARD C (US)
DI NICOLANTONIO ARTHUR R (US)
FRYE JAMES M (US)
ANNAMALAI SUBRAMANIAN (US)
VIDONIC NICHOLAS G (US)
STELL RICHARD C (US)
DI NICOLANTONIO ARTHUR R (US)
FRYE JAMES M (US)
ANNAMALAI SUBRAMANIAN (US)
VIDONIC NICHOLAS G (US)
International Classes:
C10G9/00; C10G9/14; C10G11/00; C10G; (IPC1-7): C10G9/00; C10G9/20
Foreign References:
| US20040004022A1 | 2004-01-08 | |||
| US4954247A | 1990-09-04 | |||
| US5190634A | 1993-03-02 |
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