American Potato Journal

, Volume 27, Issue 12, pp 425–438 | Cite as

Acid hydrolysis of potatoes under pressure

  • A. S. Hunter
  • E. A. Talley


The acid hydrolysis of potatoes does not appear promising as a method of processing cull and surplus potatoes for storage or transportation. Elevated pressures do not seem to have much advantage, although they produce results in a shorter time or with less acid. To avoid decomposition, high acid concentrations would be required, and the resulting syrups would be difficult to concentrate. The statement, “In order to be suitable for commercial use, the agent promoting hydrolysis must give a high rate of hydrolysis as compared with the rate of sugar decomposition” (3) applies with the same force to the hydrolysis of potatoes as to the hydrolysis of wood cellulose. The rate of decomposition of potato hydrolyzates seems to increase more rapidly with temperature than the rate of hydrolysis, and the ratio is more favorable for wood cellulose than for potatoes. This method of hydrolysis is more promising when the hydrolyzates are to be used as fermentation substrates and when it is not necessary to hydrolyze the starch completely to glucose. Relatively high acid concentrations and close control would be required to keep decomposition to a minimum. Under properly controlled conditions, the results might well be satisfactory. Use of the material as a fermentation substrate would not require the expensive concentration step.


Starch Acid Hydrolysis AMERICAN Potato Journal Fermentation Substrate Wood Cellulose 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature Cited

  1. 1.
    Dunning, J. W., and Lathrop, E. C. 1945. The saccharification of agricultural residues. Ind. Eng. Chem. 37: 24–29.CrossRefGoogle Scholar
  2. 2.
    Harris, E. E. 1949. Wood saccharification. Advances in Carbohydrate Chem. 4: 153–188.Google Scholar
  3. 3.
    —, and Kline, A.A. 1949. Hydrolysis of wood cellulose with hydrochloric acid and sulfur dioxide and the decomposition of its hydrolytic products. J. Physical and Colloid Chem. 53: 344–351.CrossRefGoogle Scholar
  4. 4.
    Kerr, R. W. 1944. Chemistry and industry of starch. Academic Press, Inc. New York. Chapter XIV.Google Scholar
  5. 5.
    Maillard, L. C. 1916. Synthese des matieres humiques par action des acides amines, sur les sucres reducteurs. Ann. Chim. Series 9, (5): 258–317.Google Scholar
  6. 6.
    —. 1917. Identite des matieres humiques de synthese avec les matieres humiques naturelles. Ann. Chim. Series 9, (7): 113–152.Google Scholar
  7. 7.
    Official and tentative methods of analysis of the association of official agricultural chemists. 1945. Sixth ed. Washington, D. C. pp. 409–410.Google Scholar
  8. 8.
    Saeman, J. F. 1945. Kinetics of wood saccharification hydrolysis of cellulose and decomposition of sugars in dilute acid at high temperature. Ind. Eng. Chem. 37: 43–52.CrossRefGoogle Scholar
  9. 9.
    Steiner, E. T., and Guthrie, J. D. 1944. Determination of starch in sweet potato products and other plant materials. Ind. Eng. Chem., Anal. Ed. 16: 736–739.CrossRefGoogle Scholar
  10. 10.
    Symposium. 1945. Sugars from wood. Ind. Eng. Chem. 37: 4–54.Google Scholar

Copyright information

© Springer 1950

Authors and Affiliations

  • A. S. Hunter
    • 1
  • E. A. Talley
    • 1
  1. 1.Eastern Regional Research LaboratoryPhiladelphia 18

Personalised recommendations