Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1997-07-25
1999-11-02
Lee, Howard C.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536 58, 536 84, 536 69, 536111, 5361231, 53612312, 536124, C08B 3104, C08B 3110, C08B 3700
Patent
active
059773480
ABSTRACT:
This invention relates to a process for chemically modifying polysaccharides in a densified fluid. In particular, the modification includes esterification and/or etherification of a starch in supercritical carbon dioxide. The process is advantageous in that it allows for a high degree of substitution without the use of organic solvents or repeated reactions.
REFERENCES:
patent: 2461139 (1949-02-01), Caldwell
patent: 3839320 (1974-10-01), Bauer
patent: 4598006 (1986-07-01), Sand
patent: 4820752 (1989-04-01), Berens et al.
patent: 4990601 (1991-02-01), Skjak-Braek et al.
patent: 5321132 (1994-06-01), Billmers
patent: 5578088 (1996-11-01), Schrell et al.
patent: 5667691 (1997-09-01), Ghatta et al.
A. R. Berens, Gary S. Huvard, Richard W. Korsmeyer, F. W. Kunig, Application of Compressed Carbon Dioxide in the Incorporation of Additives into Polymers, The BF Goodrich Company, Research & Development Center, Brecksville, Ohio, pp. 231-242, 1988.
Manssur Yalpani, "Supercritical fluids: puissant media for the modification of polymers and biopolymers", Polymer 1993 vol. 34, No. 5, pp. 1102-1105, 1992.
Manssur Yalpani, "New Approaches to the Synthesis of Glycan Derivatives", Carbohydrates and Carbohydrate Polymers, Analysis, Biotechnology, Modification, Antiviral, Biomedical and Other Applications, Yalpani, M. (ed.), .COPYRGT.ATL Press, 1993.
Hyun-Song Lee, Woo Gi Lee, Sang-Woo Park, Huen Lee and Ho Nam Chang, "Starch Hydrolysis Using Enzyme in Supercritical Carbon Dioxide", Biotechnology Techniques, vol. 7 No. 4 (Apr. 1993) pp. 267-270.
Harris Rosemarie
Humphreys Robert W. R.
Jureller Sharon H.
Kerschner Judith L.
Trzasko Peter T.
Kaiser Karen G.
Lee Howard C.
National Starch and Chemical Investment Holding Corporation
LandOfFree
Polysaccharide modification in densified fluid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polysaccharide modification in densified fluid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polysaccharide modification in densified fluid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2137194