Process for separating ketoses from alkaline-or pyridine-catalyz

Details Process for separating ketoses from alkaline-or pyridine-catalyz Process for separating ketoses from alkaline-or pyridine-catalyz

1987-09-04

1989-11-14

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536124, C07H 100

Patent

active

048809209

ABSTRACT:
A process for the liquid phase adsorptive separation of psicose from an aqueous feed mixture of monosaccharides containing psicose along with other aldoses and ketoses. The feed is contacted with a calcium-Y type zeolite in two stages. Psicose and fructose are selectively adsorbed to the substantial exclusion of other aldoses and ketoses. In a first embodiment, the extract from the first stage is psicose and fructose is eluted with the raffinate components. In a second embodiment, psicose is again recovered in high purity from the first place as a first extract material while a second extract material, comprising highly purified fructose, is also recovered. The process can be carried out on a commercial scale by means of a simulated moving bed flow scheme.

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"Chemistry of the Carbohydrates" by William Ward Pigman and Rudolph Maximilian Goepp, Jr., 1948 Academic Press Inc., Publishers, pp. 41, 126, 127.

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