Abstract
BELIEVING that the usual methods of acetylation give degraded products, Wassermann1 has attempted to acetylate alginic acid with ketene. By this means he succeeded in introducing approximately one acetyl group into each repeating unit of the polymer. Some years ago we studied the action of ketene on alginic acid under various conditions, and although products with a higher acetyl content (20.9 per cent) than Wassermann's were obtained, the method was abandoned in favour of a simpler and more effective procedure2.
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References
Wassermann, Nature, 158, 271 (1946).
Cunningham, Chamberlain and Speakman, Brit. Pat. 573, 591 (1945).
Speakman and Chamberlain, J. Soc. Dyers and Col., 60, 264 (1944).
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CHAMBERLAIN, N., CUNNINGHAM, G. & SPEAKMAN, J. Alginic Acid Diacetate. Nature 158, 553 (1946). https://doi.org/10.1038/158553b0
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DOI: https://doi.org/10.1038/158553b0
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