US4664718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating arabinose from a pentose/hexose mixture
Assignee: Honeywell UOP LLC
•
Filing: 1986-09-05
•
Granted: 1987-05-12
•
Expires: 2006-09-05
Abstract
Abstract A process for the liquid phase adsorptive separation of arabinose from an aqueous feed mixture of monosaccharides containing arabinose along with other aldopentoses and aldohexoses. The feed is contacted with a calcium-Y or clacium-X type zeolite. Arabinose is selectively adsorbed to the substantial exclusion of other aldoses and thereafter is recovered in high purity by desorption with water or ethanol. The process can be carried out on a commercial scale by means of a simulated moving bed flow scheme.
Inventors
- 👤 Chin-Hsiung Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:56
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1814; B01D15/1821; B01D15/185; C; C13; C13K; C13K13/00; C13K13/007; B01D15/26; B01D15/36; B01D15/361; B01D15/362
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A process for separating arabinose from an aqueous feed mixture containing arabinose and at least one other monosaccharide, selected from the group consisting of aldopentoses and aldohexoses, which comprises contacting at adsorption conditions said mixture with an adsorbent consisting of a type Y or type X zeolite having calcium cations at exchangeable cationic sites, selectively adsorbing said arabinose to the substantial exclusion of the other monosaccharides, removing the nonadsorbed portion of the feed mixture from contact with the adsorbent, and thereafter recovering high purity arabinose by desorption at desorption conditions.
Claim 2
Dependent Claim
90 words
A process for separating arabinose from an aqueous feed mixture containing arabinose and at least one other monosaccharide, selected from the group consisting of aldopentoses and aldohexoses, which comprises contacting at adsorption conditions said mixture with an adsorbent consisting of a type Y or type X zeolite having calcium cations at exchangeable cationic sites, selectively adsorbing said arabinose to the substantial exclusion of the other monosaccharides, removing the nonadsorbed portion of the feed mixture from contact with the adsorbent, and thereafter recovering high purity arabinose by desorption at desorption conditions.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein said feed mixture contains arabinose and at least one other monosaccharide selected from the group consisting of xylose, glucose, galactose, mannose, and rhamnose.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein said desorbent comprises water.
Claim 5
Dependent Claim
20 words
The process of claim 3 wherein said adsorbent consisting of type Y zeolite having calcium cations at exchangeable cationic sites.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said separation is effected by means of a simulated moving bed flow scheme.
Claim 7
Dependent Claim
15 words
The process of claim 5 wherein said simulated moving bed scheme uses a countercurrent flow.
Claim 8
Dependent Claim
14 words
The process of claim 5 wherein said simulated moving bed scheme uses cocurrent flow.
References Cited (Backward Citations)
US3160624A
Cited
US2985589A
Cited
US3201491A
Cited
US3265750A
Cited
US3510423A
Cited
US4442285A
Cited
US4482761A
Cited
EP0115068A1
Cited
US4471114A
Cited
US4516566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |