Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Reexamination Certificate
2004-11-12
2008-08-05
Caldarola, Glenn (Department: 1797)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
Reexamination Certificate
active
07408092
ABSTRACT:
The average propylene cycle selectivity of an oxygenate to propylene (OTP) process using a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a combination of: 1) moving bed reactor technology in the hydrocarbon synthesis portion of the OTP flow scheme in lieu of the fixed bed technology of the prior art; 2) a hydrothermally stabilized and dual-functional catalyst system comprising a molecular sieve having dual-function capability dispersed in a phosphorus-modified alumina matrix containing labile phosphorus and/or aluminum anions; and 3) a catalyst on-stream cycle time of 400 hours or less. These provisions stabilize the catalyst against hydrothermal deactivation and hold the build-up of coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of average propylene cycle yield near or at essentially start-of-cycle levels.
REFERENCES:
patent: 4061724 (1977-12-01), Grose et al.
patent: 4073865 (1978-02-01), Flanigen et al.
patent: 4269717 (1981-05-01), Slovinsky
patent: 4310440 (1982-01-01), Wilson et al.
patent: 4387263 (1983-06-01), Vogt et al.
patent: 4433188 (1984-02-01), Hoelderich et al.
patent: 4440871 (1984-04-01), Lok et al.
patent: 4527001 (1985-07-01), Kaiser
patent: 4554143 (1985-11-01), Messina et al.
patent: 4579999 (1986-04-01), Gould et al.
patent: 4587373 (1986-05-01), Hsia
patent: 4629717 (1986-12-01), Chao
patent: 4677243 (1987-06-01), Kaiser
patent: 4752651 (1988-06-01), Kaiser
patent: 4788377 (1988-11-01), Chang et al.
patent: 4793984 (1988-12-01), Lok et al.
patent: 4853197 (1989-08-01), Wilson et al.
patent: 4873390 (1989-10-01), Lewis et al.
patent: 5095163 (1992-03-01), Barger
patent: 5126308 (1992-06-01), Barger et al.
patent: 5157181 (1992-10-01), Stine et al.
patent: 5191141 (1993-03-01), Barger et al.
patent: 6121504 (2000-09-01), Kuechler et al.
patent: 6455749 (2002-09-01), Vaughn
patent: 2003/0139635 (2003-07-01), Hack et al.
patent: 2004/0102667 (2004-05-01), Vora et al.
patent: 0 448 000 (1994-05-01), None
patent: 1 396 481 (2004-03-01), None
patent: 2 171 718 (1986-09-01), None
Rothaemel et al., “Demonstrating the New Methanol to Propylene (MTP) Process”, Mar. 2003, ERTC Petrochemical Conference, Paris, France.
Chen John Q.
Glover Bryan K.
Pujado Peter R.
Vora Bipin V.
Bullock In Suk
Caldarola Glenn
Goldberg Mark
UOP LLC
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