Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1985-05-13
1987-06-23
Brown, Johnnie R.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536119, C07H 100
Patent
active
046753931
ABSTRACT:
A cost-effective process suitable for the commercial production of the sugar acetate, glucose penta-acetate and xylose tetra-acetate is disclosed. The process comprises a first reaction stage wherein glucose or xylose is partially acetylated with acetic acid to form glucose diacetate or xylose diacetate, followed by a second reaction stage wherein said diacetate product is fully acetylated by treatment with excess acetic anhydride to form glucose penta-acetate or xylose tetra-acetate, respectively. Any excess of acetic anhydride/acetic acid and by-product acetic acid can be recycled for use in the process.
REFERENCES:
patent: 2013034 (1935-09-01), Cox et al.
patent: 2174541 (1939-10-01), Walthausen et al.
patent: 2376378 (1945-05-01), Murray
patent: 2857378 (1958-10-01), Hales
patent: 3824286 (1974-07-01), Grimmelikhuysen
Pigman, The Carbohydrates, New York: Academic Press Inc., 1957, pp. 139-142, 198-199.
Kirk-Othmer, Encycl. of Chem. Technology, vol. 19, 2nd Ed., John Wiley & Sons, NY (1969), pp. 226-227.
Japanese Patent Application 49/133,314 and what is belived to be an accurate English Translation.
Brown Johnnie R.
Farrell James J.
Lever Brothers Company
Peselev Elli
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