Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Reexamination Certificate
2006-04-11
2006-04-11
Johnson, Christina (Department: 1725)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
C502S063000, C502S064000, C502S071000, C502S077000, C502S073000
Reexamination Certificate
active
07026263
ABSTRACT:
Provided herein are hybrid catalysts that are used in the deep catalytic cracking of petroleum naphthas or other hydrocarbon feedstocks, for the selective production of light olefins, in particular ethylene and propylene and BTX aromatics. The hybrid catalysts of this invention contain a chemically treated microporous crystalline silicate such as the pentasil-type silicalite, a mesoporous silica-alumina or zirconium oxide co-catalyst, into which may be incorporated aluminum oxide, molybdenum oxide, lanthanum oxide, cerium oxide or a mixture of aluminum and molybdenum oxides, and an inorganic binder such as bentonite clay. These novel catalysts show several advantages with respect to the classical steam (thermal) cracking: i) higher combined production of ethylene and propylene; ii) lower ethylene/propylene ratio; iii) much lower production of methane; iv) much lower reaction temperature resulting in significant energy savings; v) easy in-situ regeneration using air as oxidant; vi) lower carbon dioxide and other volatile oxides emitted during the regeneration phase.
REFERENCES:
patent: 4066531 (1978-01-01), Owen et al.
patent: 4732881 (1988-03-01), Le Van Mao
patent: 4808560 (1989-02-01), Oleck
patent: 5051385 (1991-09-01), Wachter
patent: 5290744 (1994-03-01), Degnan Jr. et al.
patent: 5554274 (1996-09-01), Degnan et al.
patent: 6358486 (2002-03-01), Shan et al.
patent: 6558647 (2003-05-01), Lacombe et al.
patent: 6762143 (2004-07-01), Shan et al.
patent: 6800266 (2004-10-01), Pinnavaia et al.
patent: 2389536 (2001-05-01), None
patent: WO 01/32806 (2001-05-01), None
Kung,Transition metal oxides: surface chemistry and catalysis, studies in surface science and catalysis, vol. 45:72-90, Elsevier (Amsterdam), 1989.
Le Van Mao et al., “Modification of the micropore characteristics of the desilicated ZSM-5 zeolite by thermal treatment,”Zeolitesm, 19:270-278, 1997.
Le Van Mao et al., “Selective deep catalytic cracking process (SDCC) of petroleum feedstocks for the production of light olefins,”Catalysis Letter, 73:181-186, 2001.
Le Van Mao et la., “Selective removal of silicon from zeolite frameworks using sodium carbonate,”Materials Chemistry, 4:605-610, 1994.
Le Van Mao, “Hybrid catalysts containing a microporous zeolite and mesoporous cocatalyst forming a pore continuum for a better desorption of reaction products,”Microporous and Mesoporous Material, 28:9-17, 1999.
Fulbright & Jaworski L.L.P.
Johnson Christina
Valorbec, Société en commandite
LandOfFree
Hybrid catalysts for the deep catalytic cracking of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hybrid catalysts for the deep catalytic cracking of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid catalysts for the deep catalytic cracking of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3570824