Process for preparing lactulose from lactose, in the form of a syrup or a crystalline product
AssigneeSirac SpA
InventorsRenato Carobbi, Sandro Miletti, Vittorio Franci
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Abstract
A process for preparing lactulose from lactose, in the form of a concentrated syrup or high purity crystals, for pharmaceutical use or for use as a sweetener. The process is characterized by using as the lactose epimerizing agent a mixture of equal parts of MgO and sodium hydrosulphite, each component being used to the extent of between 0.05 and 0.2% by weight with respect to the lactulose, at a temperature of about 100.degree. C. The epimerization is complete in a few minutes. The crystalline lactulose is obtained by crystallization from ethanol.
Claims8
A process for preparing lactulose from lactose, comprising adding to an aqueous solution containing 60%-70% of lactose, a basic magnesium compound and sodium hydrosulphite in amounts corresponding to 0.05%-0.2% by weight of each of the added compounds with respect to the lactose and heating the solution to a temperature of from 90.degree. C. to 100.degree. C. to effect isomerization of the lactose to lactulose in the presence of the magnesium compound and the sodium hydrosulfite to produce a reaction solution containing the lactulose.
Dependencies are inferred from the claim text.