Continuous process for the preparation of crystalline lactulose

摘要

The present invention concerns a process that can be realised continuously for the preparation of anhydrous crystalline lactulose from commercial aqueous syrups that contain it, characterised in that the crystallisation and consequent separation of the high-purity lactulose with high yields from the syrup is triggered by mixing the ore pulp (or recycled ore pulp), obtained from a previous lactulose crystallisation phase, with the syrup itself.

主权项

1. A process for continuous preparation of anhydrous crystalline lactulose from an aqueous syrup containing it, which has been concentrated to a saccharimetric degree of from 70° to 80° Brix, comprising mixing a mother liquor left following separation of lactulose crystals from a previous, lactulose crystallisation phase, said mother liquor having a saccharimetric index of from 64.0° to 69.0° Brix, with said aqueous syrup to trigger crystallisation of lactulose without the addition of any crystalline triggering agents from outside said process, and separating said anhydrous crystalline lactulose in high yield and highly purified form therefrom.