Gas separation: processes – Solid sorption – Including reduction of pressure
Reexamination Certificate
2007-12-11
2007-12-11
Lawrence, Frank M. (Department: 1724)
Gas separation: processes
Solid sorption
Including reduction of pressure
C095S104000, C095S106000, C095S116000, C095S148000
Reexamination Certificate
active
11092684
ABSTRACT:
Biogas released from landfills and sewage treatment plants is freed of siloxane contaminants by passing the biogas through a bed containing activated alumina, which absorbs the siloxanes. When the activated alumina becomes saturated with siloxanes, the absorption capability of the activated alumina can be recovered by passing a regeneration gas through the bed of activated alumina. A system containing two or more beds of activated alumina can use one bed to remove siloxanes from biogas while one or more of the other beds are being regenerated.
REFERENCES:
patent: 4000990 (1977-01-01), Bingham
patent: 4770676 (1988-09-01), Sircar et al.
patent: 4784672 (1988-11-01), Sircar
patent: 5089244 (1992-02-01), Parent et al.
patent: 5529612 (1996-06-01), Troost
patent: 5900532 (1999-05-01), Ikeda et al.
patent: 5922108 (1999-07-01), Lehmann et al.
patent: 6196050 (2001-03-01), Ikeda et al.
patent: 6365108 (2002-04-01), Philyaw
patent: 6391090 (2002-05-01), Alvarez, Jr. et al.
patent: 6444013 (2002-09-01), Helly et al.
patent: 6461411 (2002-10-01), Watanabe et al.
patent: 6645898 (2003-11-01), Alvarez, Jr. et al.
patent: 6712885 (2004-03-01), Basseen et al.
patent: 2003/0097932 (2003-05-01), Watanabe et al.
patent: 2004/0045440 (2004-03-01), Baseen et al.
patent: 2004/0069146 (2004-04-01), Carter et al.
patent: 2004/0123736 (2004-07-01), Torres, Jr. et al.
patent: 2004/0168571 (2004-09-01), Alvarez, Jr. et al.
patent: 2006/0000352 (2006-01-01), Tower et al.
patent: 2007/0068386 (2007-03-01), Mitariten
patent: 60-222144 (1985-11-01), None
Schweigkofler, Martin, et al., “Removal of siloxanes in biogases”, J. Haz. Mat., B83 (2001), pp. 183-196.
Letter dated Jun. 18, 2007 from Michael J. Mitariten of Guild Associates addressed to Frank Lawrence of the United States Patent and Trademark Office with reference to the within application.
Article entitled Removal of Siloxanes in Biogases, authored by Martin Schweigkofler and Reinhard Niessner, published in the Journal of Hazardous Materials (2001), pp. 183-186.
Hunter Christopher H.
Lawrence Frank M.
Parker-Hannifin Corporation
LandOfFree
Siloxane removal 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 Siloxane removal process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Siloxane removal process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3883877