Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Reexamination Certificate
2006-06-06
2006-06-06
Griffin, Walter D. (Department: 1764)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
C585S639000
Reexamination Certificate
active
07057083
ABSTRACT:
This invention relates to processes for converting oxygenates to olefins that include a step of pretreating molecular sieve used in the conversion reaction with a C4–C7olefin composition, which contains one or more C4–C7olefins. Fresh or regenerated molecular sieve, which is low in carbon content, is contacted or pretreated with the olefin composition to form a hydrocarbon co-catalyst within the pore structure of the molecular sieve, and the pretreated molecular sieve containing the co-catalyst is used to convert oxygenate to a lighter olefin product.
REFERENCES:
patent: 4677242 (1987-06-01), Kaiser
patent: 5817907 (1998-10-01), Benazzi et al.
patent: 6046372 (2000-04-01), Brown et al.
patent: 6051746 (2000-04-01), Sun et al.
patent: 6137022 (2000-10-01), Kuechler et al.
patent: 6225254 (2001-05-01), Janssen et al.
patent: 6436869 (2002-08-01), Searle et al.
patent: 6437208 (2002-08-01), Kuechler et al.
patent: 6657022 (2003-12-01), Williams et al.
patent: 6734330 (2004-05-01), Xu et al.
patent: 6743747 (2004-06-01), Xu et al.
patent: 0 054 375 (1982-06-01), None
patent: WO 01/62382 (2001-08-01), None
Kolboe, S., “Methanol Reactions on ZSM-5 and Other Zeolite Catalysts: Autocatalysis and Reaction Mechanism”, Acfa Chem. Scand. A 40 (1986), pp. 711-713.
Kolboe, S., “On the Mechanism of Hydrocarbon Formation from Methanol Over Protonated Zeolites”, Methane Conversion, Elsevier Science: Amsterdam, (1988), pp. 189-193.
Dahl, I. M. et al., “On the Reaction Mechanism for Hydrocarbon Formation from Methanol over SAPO-34-1. Isotopic Labeling Studies of the Co-reaction of Ethene and Methanol”, J. Catal. 149 (1994), 749, pp. 458-464.
Dahl, I.M. et al., “On the Reaction Mechanism for Hydrocarbon Formation from Methanol over SAPO-34-2. Isotopic Labeling Studies of the Co-reaction of Propene and Methanol”, J. Catal. 161 (1996), 161, pp. 304-309.
Song, W.G. et al, “Methylbenzenes Are the Organic Reaction Centers for Methanol-to-Olefin Catalysis on HSAPO-34”, J. Am. Chem. Soc. (2000), 122, pp. 10726-10727.
Song, W.G. et al, “Supramolecular Origins of Product Selectivity for Methanol-to-Olefin Catalysis on HSAPO-34”, J. Am. Chem. Soc. (2001), 123, pp. 4749-4754.
Haw, J.F. et al., “Roles for Cyclopentenyl Cations in the Synthesis of Hydrocarbons from Methanol on Zeolite Catalyst HZSM-5”, J. Am. Chem. Soc. (2000), 122, pp. 4763-4775.
Arstad, B. et al., “The Reactivity of Molecules Trapped within the SAPO-34 Cavities in the Methanol-to-Hydrocarbons Reaction”, J. Am. Chem. Soc.(2001), 123, pp. 8137-8138.
Xu, T. et al., “Toward a Systematic Chemistry of Organic Reactions in Zeolites: In Situ NMR Studies of Ketones”, J. Am. Chem. Soc. (1994), 776, pp. 1962-1972.
Song, W.G. et al, “A Persistent Carbenium Ion on the Methanol-to-Olefin Catalyst HSAPO-34: Acetone Shows the Way”, J. Phys. Chem. B (2001), 105, pp. 4317-4323.
Clem Kenneth Ray
Coute Nicolas P.
Kuechler Keith H.
Xu Teng
Bullock In Suk
ExxonMobil Chemical Patents Inc.
Griffin Walter D.
LandOfFree
Catalyst pretreatment with C4-C7 olefins in an oxygenate to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalyst pretreatment with C4-C7 olefins in an oxygenate to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst pretreatment with C4-C7 olefins in an oxygenate to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3648689