| 摘要 |
<p>Psicose is sepatated from at least one other ketose in an adsorption step using a type Y zeolite adsorbent having calcium cations at exchangeable cationic sites. After desorption, psicose is recovered in the extract in high purity with the other ketose or ketoses being concentrated in the raffinate. In a preferred mode of operation, the psicose separation is performed with 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. In the first stage, psicose and fructose are selectively adsorbed, to the substantial exclusion from the extract of other aldoses. In the second stage, psicose is adsorbed from the extract of the first stage, and recovered in higher purity than the feed. Fructose is recovered substantially psicose-free in high purity in the raffinate.</p> |
