Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1995-06-02
1997-02-04
Nazario-Gonzalez, Porfirio
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562580, 562582, 562587, 562590, 562593, C07C 5116, C07C 5142
Patent
active
055999778
ABSTRACT:
Rapid temperature rises which characterize carbohydrate-nitric acid oxidation reactions used to form carbohydrate-derived acids may be moderated and temperature control readily maintained by blowing a gas such as air, oxygen, nitrogen or the like into the reaction mixture as needed to control the temperature of the reaction. The more moderate reaction conditions afford higher yield of the desired product with a concomitant reduction of byproducts which may be difficult to remove and usually are unwanted as well. Upon completion the oxidation mixture is made basic (e.g. with an alkali metal base hydroxide or carbonate, ammonia or an amine) to a pH at which the the carboxyl group or groups of the product carbohydrate-derived acid are entirely in the salt form. The aqueous solution is then passed through an ion retardation resin column to recover the carbohydrate-derived salt, using water as the eluent. If desired, the carbohydrate-derived acid salt may then be recovered easily by removal of solvent water or by precipitation by addition of an water-miscible organic compound such as methanol, ethanol, acetone, isopropanol, etc.).
REFERENCES:
patent: 2472168 (1949-06-01), Mehltretter et al.
patent: 3078140 (1963-02-01), Hatch
patent: 4478722 (1984-10-01), Boom
Brown, "Ion Exchange Chromatography . . . Ion Retardation Resin", Brown's 1995 Catalog, p. 37. 1995.
"Methods in Carbohydrate Chemistry", vol. II, Whistler et al. eds., pp. 38-40, 46, 48, Academic Press 1963.
CIBA, Ltd, Belg, Pat 615,023 (Sep. 1962). C.A. 1963, 2934b.
Bio-Rad, Inc Catalog (1995), pp. 37-39.
Mehltretter and Rist, "Sugar Oxidation", Ag. and Food Chem., 1, pp. 779-783 (1953).
Roper, "Selective Oxidation of Glucose", starch/starke 42 (1990) pp. 342-349.
Stanek et al., eds. "The Monosaccharides", pp. 741-752 Academic Press (1963).
Carter Andy
Kiely Donald E.
Shrout David P.
Gates Stephen
Hendricks Glenna
Nazario-Gonzalez Porfirio
William Rosalynd A.
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