Process for preparing lactulose from lactose, in the form of a syrup or a crystalline product
Patent 4536221 Issued on August 20, 1985. Estimated Expiration Date: 
August 1, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 1, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3505309 3514327 3546206 3716408 3816174 Process for the hydrolysis of lactose Conversion of aldose to ketose in the presence of oxyanions or mixed oxyanions of tin or germanium Method for preparing a non-hygroscopic lactulose-containing powder Process for purifying an aqueous solution Ketose sugars from aldose sugars InventorsApplicationNo. 06/518846 filed on 08/01/1983US Classes:127/30, Sugars only127/46.2, Involving ion manipulation, e.g., ion exchange, etc.536/125, Isomerization536/127Purification or recoveryExaminersPrimary: Cintins, IvarsAttorney, Agent or FirmInternational ClassesC13K 13/00 (20060101)C07H 3/00 (20060101) C07H 3/04 (20060101) Foreign Application Priority Data1982-12-17 ITAbstractA 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° C. The epimerization is complete in a few minutes.The crystalline lactulose is obtained by crystallization from ethanol. |
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