Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1997-12-19
1998-12-15
Trinh, Ba K.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549531, C07D30112, C07D30119
Patent
active
058499377
ABSTRACT:
An olefin epoxidation process is operated using a plurality of reactor vessels, each containing a fixed bed of a heterogeneous catalyst such as titania-on-silica. The reactor vessels are connected in series whereby a feedstream comprised of olefin and an active oxygen species is passed through said series of reactor vessels in contact with the heterogeneous catalyst to accomplish conversion of the olefin to the corresponding epoxide. As the activity of the catalyst in an individual reactor vessel falls to an undesirably low level, said reactor vessel is taken out of service and a replacement reactor vessel containing fresh or regenerated catalyst introduced. The replacement reactor vessel may, in alternative embodiments of the process, be the first or the last reactor vessel in said series. For example, the feedstream may first be contacted with either the most active or the least active charge of catalyst within the series of reactor vessels. Although the latter embodiment permits somewhat longer catalyst life, the former embodiment requires much smaller capacity heat exchangers. The process of this invention considerably reduces catalyst usage as compared to a conventional fixed bed epoxidation process where all of the catalyst is replaced or regenerated at the same time.
REFERENCES:
patent: 2271646 (1942-02-01), Kassel
patent: 2322366 (1943-06-01), Kassel
patent: 3829392 (1974-08-01), Wulff
patent: 4367342 (1983-01-01), Wulff et al.
patent: 4560536 (1985-12-01), Tabak
patent: 4937051 (1990-06-01), Graven et al.
patent: 5573736 (1996-11-01), Jubin, Jr.
"Shell Permit Documents for Moerdijk (Netherlands) PO/SM Plant", 12 Dec., 1996.
Yen, Yen-Chen Propylene Oxide and Ethylene Oxide, Report No. 2 C, Apr. 1977, Process Economics Program (Stanford Research Institute), pp. 221, 223.
Wang, Shao-Hwa Propylene Oxide, Report No. 2E, Aug. 1994, Process Economics Program (SRI International), pp. 6-28.
Danner Jeffrey B.
Jubin, Jr. John C.
Arco Chemical Technology L.P.
Harper Stephen D.
Trinh Ba K.
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