Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-01-26
2009-11-10
Oh, Taylor Victor (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C536S018500, C536S018600, C536S055300, C536S123130, C536S127000, C536S018700, C536S126000, C536S124000, C549S417000, C568S902000
Reexamination Certificate
active
07615652
ABSTRACT:
The invention includes methods for producing dianhydrosugar alcohol by providing an acid catalyst within a reactor and passing a starting material through the reactor at a first temperature. At least a portion of the staring material is converted to a monoanhydrosugar isomer during the passing through the column. The monoanhydrosugar is subjected to a second temperature which is greater than the first to produce a dianhydrosugar. The invention includes a method of producing isosorbide. An initial feed stream containing sorbitol is fed into a continuous reactor containing an acid catalyst at a temperature of less than 120° C. The residence time for the reactor is less than or equal to about 30 minutes. Sorbitol converted to 1,4-sorbitan in the continuous reactor is subsequently provided to a second reactor and is dehydrated at a temperature of at least 120° C. to produce isosorbide.
REFERENCES:
patent: 3160641 (1964-12-01), Hartmann et al.
patent: 4297290 (1981-10-01), Stockburger
patent: 4408061 (1983-10-01), Salzburg et al.
patent: 4506086 (1985-03-01), Salzburg et al.
patent: 4564692 (1986-01-01), Feldmann et al.
patent: 4861513 (1989-08-01), Lueders et al.
patent: 5093535 (1992-03-01), Harrison et al.
patent: 6013812 (2000-01-01), Haas et al.
patent: 6124443 (2000-09-01), Darsow
patent: 6392062 (2002-05-01), Haas
patent: 6407266 (2002-06-01), Bhatia
patent: 6639067 (2003-10-01), Brinegar et al.
patent: 6689892 (2004-02-01), Andrews et al.
patent: 6693209 (2004-02-01), Van Es et al.
patent: 7439352 (2008-10-01), Moore et al.
patent: 2002/0052516 (2002-05-01), Moore et al.
patent: 2003/0097028 (2003-05-01), Fuertes
patent: 2003/0229235 (2003-12-01), Bhatia
patent: 2004/0030161 (2004-02-01), Bhatia
patent: 2004/0110969 (2004-06-01), Fleche et al.
patent: 2004/0110994 (2004-06-01), Bhatia
patent: 1178288 (1984-11-01), None
patent: 0061055 (1982-09-01), None
patent: 0201067 (1986-11-01), None
patent: 0380402 (1990-08-01), None
patent: 0915091 (1999-05-01), None
patent: 1179535 (2002-02-01), None
patent: 1179536 (2002-02-01), None
patent: 9721697 (1997-06-01), None
patent: 0014081 (2000-03-01), None
patent: 0041985 (2000-07-01), None
patent: 0172136 (2001-10-01), None
patent: 0194352 (2001-12-01), None
patent: 0239957 (2002-05-01), None
patent: 03022064 (2003-03-01), None
patent: 03089436 (2003-10-01), None
patent: 03089445 (2003-10-01), None
patent: 2005047228 (2005-05-01), None
Fleche, et al., “Isosorbide” Starch/Starke, vol. 38, 1986, pp. 26-30.
2006 Chemical Abstracts Catalog, published 2006 by Chemical Abstracts Service. p. 52.
Holladay Johnathan E.
Hu Jianli
Wang Yong
Werpy Todd A.
Battelle (Memorial Institute)
Oh Taylor Victor
Wells St. Lohn P.S.
LandOfFree
Two-stage dehydration of sugars does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-stage dehydration of sugars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-stage dehydration of sugars will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4055962