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RECOVERY OF LACTOSE FROM AQUEOUS SOLUTIONS: PRECIPITATION IN THE PRESENCE OF CALCIUM HYDROXIDE AND AMMONIUM CHLORIDE ADDITIONS
Author(s) -
OLANO AGUSTIN,
NICKERSON T. A.,
BERNHARD R. A.
Publication year - 1977
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1977.tb08404.x
Subject(s) - lactose , chemistry , calcium hydroxide , ammonium hydroxide , solubility , calcium , precipitation , ammonium chloride , aqueous solution , ammonium , inorganic chemistry , acetone , nuclear chemistry , food science , organic chemistry , physics , meteorology
ABSTRACT The use of calcium hydroxide instead of calcium oxide for recovery of lactose from solutions was studied. With lactose concentrations of less than 10%, recovery was unsatisfactory. Addition of NH 4 Cl increases the solubility of calcium hydroxide, and at an adequate concentration of NH 4 Cl it is possible to solubilize part of the Ca(OH) 2 without decreasing the amount of lactose in the precipitate. Then, NaOH addition improved lactose recovery markedly, precipitating more than 90% of total lactose. Acetone addition also proved effective.