Epoxidation catalyst and process

Details Epoxidation catalyst and process Epoxidation catalyst and process

2009-07-07

2010-10-26

Andres, Janet L (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C502S347000

Reexamination Certificate

active

07820840

ABSTRACT:
Disclosed herein is a catalytic method of converting alkenes to epoxides. This method generally includes reacting alkenes with oxygen in the presence of a specific silver catalyst under conditions suitable to produce a yield of the epoxides. The specific silver catalyst is a silver nanocrystal having a plurality of surface planes, a substantial portion of which is defined by Miller indices of (100). The reaction is performed by charging a suitable reactor with this silver catalyst and then feeding the reactants to the reactor under conditions to carry out the reaction. The reaction may be performed in batch, or as a continuous process that employs a recycle of any unreacted alkenes. The specific silver catalyst has unexpectedly high selectivity for epoxide products. Consequently, this general method (and its various embodiments) will result in extraordinarily high epoxide yields heretofore unattainable.

REFERENCES:
patent: 2279469 (1942-04-01), Law et al.
patent: 2279470 (1942-04-01), Law et al.
patent: 5008413 (1991-04-01), Liu
patent: 5374748 (1994-12-01), Rizkalla
patent: 5387751 (1995-02-01), Hayden et al.
patent: 5663385 (1997-09-01), Kemp
patent: 5780657 (1998-07-01), Cooker et al.
patent: 5905053 (1999-05-01), Rizkalla et al.
patent: 5965480 (1999-10-01), Cooker et al.
patent: 6750173 (2004-06-01), Rizkalla et al.
patent: 2004/0224841 (2004-11-01), Matusz et al.
patent: 2005/0056118 (2005-03-01), Xia et al.
patent: 54-115306 (1979-09-01), None
patent: 2002-510306 (2002-04-01), None
Williams et al., J. Am. Chem. Soc., 2004, 126, 8509-8514.
Campbell, “The selective epoxidation of ethylene catalyzed by Ag(111): a comparison with Ag(110),”J. Catal., 94:436-444 (1985).
Kokalj et al., “Adsorption of ethylene on stepped Ag(n10) surfaces,” Conference presentation at the 22nd European Conference on Surface Science (Sep. 8, 2003).
Sajkowski et al., “Structure sensitivity of the catalytic oxidation of ethene by silver,”Catal. Rev. Sci. Eng., 29:325-60 (1987).
Sun et al., “Large-scale synthesis of uniform silver nanowires through a soft, self-seeding, polyol process,”Adv. Mater., 14:833-7 (2002).
Sun et al., “Shape-controlled synthesis of gold and silver nanoparticles,”Science, 298:2176-9 (2002).
Xu, et al., “Shape-Dependent Catalytic Activity of Silver Nanoparticles for the Oxidation of Styrene,”Chemistry—An Asian Journal, 1:888-93 (2006).
International Search Report for International Application No. PCT/US2009/049816, dated Mar. 8, 2010.
Written Opinion of the International Searching Authority, International Application No. PCT/US2009/049816, dated Mar. 8, 2010.

Affiliated with

Also associated with

Rating

Epoxidation catalyst and process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Epoxidation catalyst and process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Epoxidation catalyst and process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4205621