Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By c content reduction – e.g. – cracking – etc.
Reexamination Certificate
2007-07-17
2007-07-17
Dang, Thuan Dinh (Department: 1764)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By c content reduction, e.g., cracking, etc.
C585S652000
Reexamination Certificate
active
10851487
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.
REFERENCES:
patent: 1936699 (1933-11-01), Weaver
patent: 1984569 (1934-12-01), Cooke et al.
patent: 2091261 (1937-08-01), Alther
patent: 2158425 (1939-05-01), Ragatz
patent: 3291573 (1966-12-01), Frescoln
patent: 3341429 (1967-09-01), Fondrk
patent: 3413211 (1968-11-01), Becraft et al.
patent: 3487006 (1969-12-01), Newman et al.
patent: 3492795 (1970-02-01), Guerrieri
patent: 3505210 (1970-04-01), Wallace et al.
patent: 3617493 (1971-11-01), Wirth et al.
patent: 3677234 (1972-07-01), Dutkiewicz
patent: 3718709 (1973-02-01), Simonetta
patent: 3900300 (1975-08-01), Lehman
patent: 4199409 (1980-04-01), Skraba
patent: 4264432 (1981-04-01), Gartside
patent: 4300998 (1981-11-01), Gartside
patent: 4311580 (1982-01-01), Bartholic
patent: 4361478 (1982-11-01), Gengler et al.
patent: 4400182 (1983-08-01), Davies et al.
patent: 4426278 (1984-01-01), Kosters
patent: 4543177 (1985-09-01), Murthy et al.
patent: 4615795 (1986-10-01), Woebcke et al.
patent: 4714109 (1987-12-01), Tsao
patent: 4732740 (1988-03-01), Woebcke et al.
patent: 4840725 (1989-06-01), Paspek
patent: 4854944 (1989-08-01), Strong
patent: 4954247 (1990-09-01), Lipkin et al.
patent: 5096567 (1992-03-01), Paspek, Jr. et al.
patent: 5120892 (1992-06-01), Skraba
patent: 5190634 (1993-03-01), Fernandez-Baujin et al.
patent: 5468367 (1995-11-01), Dickakian
patent: 5580443 (1996-12-01), Yoshida et al.
patent: 5817226 (1998-10-01), Lenglet
patent: 5910440 (1999-06-01), Grossman et al.
patent: 6093310 (2000-07-01), Swan
patent: 6123830 (2000-09-01), Gupta et al.
patent: 6179997 (2001-01-01), Vedder, Jr. et al.
patent: 6190533 (2001-02-01), Bradow et al.
patent: 6210561 (2001-04-01), Bradow et al.
patent: 6303842 (2001-10-01), Bridges et al.
patent: 6376732 (2002-04-01), Ngan et al.
patent: 6632351 (2003-10-01), Ngan et al.
patent: 6743961 (2004-06-01), Powers
patent: 2001/0016673 (2001-08-01), Bridges et al.
patent: 2003/0070963 (2003-04-01), Zimmerman et al.
patent: 2004/0004022 (2004-01-01), Stell et al.
patent: 2004/0004027 (2004-01-01), Spicer et al.
patent: 2004/0004028 (2004-01-01), Stell et al.
patent: 2004/0039240 (2004-02-01), Powers
patent: 2004/0054247 (2004-03-01), Powers
patent: 2005/0010075 (2005-01-01), Powers
patent: 1093351 (1960-11-01), None
patent: 0063448 (1982-10-01), None
patent: 1472280 (1967-03-01), None
patent: 199 766 (1923-06-01), None
patent: 998 504 (1965-07-01), None
patent: 1 053 751 (1967-01-01), None
patent: 1 203 017 (1970-08-01), None
patent: 1 233 795 (1971-05-01), None
patent: 2006259 (1977-10-01), None
patent: 2012176 (1977-11-01), None
patent: 7410163 (1975-04-01), None
patent: 1491552 (1989-07-01), None
patent: WO 01/55280 (2001-08-01), None
patent: 907394 (1991-07-01), None
Dennis A. Duncan and Vance A. Ham, Stone & Webster, “The Practicalities of Stream-Cracking Heavy Oil”, Mar. 29-Apr. 2, 1992, AlChE Spring National Meeting in New Orleans, LA, pp. 1-41.
ABB Lummus Crest Inc., (presentation) HOPS, “Heavy Oil Processing System”, Jun. 15, 1992 TCC PEW Meeting, pp. 1-18.
Mitsui Sekka Engineering Co., Ltd./Mitsui Engineering & Shipbuilding Co., Ltd, “Mitsui Advanced Cracker & Mitsui Innovative Quencher”, pp. 1-16, date not available.
“Specialty Furnace Design: Steam Reformers and Steam Crackers”, presented by T.A. Wells of the M.W. Kellogg Company, 1988 AIChE Spring National Meeting.
Annamalai Subramanian
Di Nicolantonio Arthur R.
Frye James M.
Stell Richard C.
Vidonic Nicholas G.
Dang Thuan Dinh
ExxonMobil Chemical Patents Inc.
LandOfFree
Process and apparatus for removing coke formed during steam... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for removing coke formed during steam..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for removing coke formed during steam... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3738218