Patent US4837315A successfully refreshed from Google Patents.
US4837315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating glucose and mannose with CA/NH4 - exchanged ion exchange resins
Assignee: Honeywell UOP LLC
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Filing: 1987-06-22
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Granted: 1989-06-06
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Expires: 2007-06-22
Abstract
Abstract Mannose is separated from mixtures with glucose and other saccharides by adsorption of sulfonated polystyrene divinylbenzene crosslinked ion exchange resins, and desorbing the adsorbate with water. Glucose is removed from the adsorption process in the raffinate.
Inventors
- 👤 Santi Kulprathipanja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:12
CPC Classifications
C; C07; C07H; C07H3/00; C07H3/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A process for separating mannose from a mixture of glucose and mannose which comprises contacting said mixture at a temperature of from 20° C. to 200° C. and a pressure sufficient to maintain liquid phase, with an adsorbent comprising a partial calcium and partial ammonium salt of a sulfonated polystyrene polymer, crosslinked with divinylbenzene, selectively adsorbing said mannose, removing the nonadsorbed portion of said mixture from contact with said adsorbent, thereby recovering high purity glucose and desorbent and separating said mannose by desorption with a desorbent comprising water at a temperature of from 20° C. to 200° C. and a pressure sufficient to maintain liquid phase.
Claim 2
Dependent Claim
106 words
A process for separating mannose from a mixture of glucose and mannose which comprises contacting said mixture at a temperature of from 20° C. to 200° C. and a pressure sufficient to maintain liquid phase, with an adsorbent comprising a partial calcium and partial ammonium salt of a sulfonated polystyrene polymer, crosslinked with divinylbenzene, selectively adsorbing said mannose, removing the nonadsorbed portion of said mixture from contact with said adsorbent, thereby recovering high purity glucose and desorbent and separating said mannose by desorption with a desorbent comprising water at a temperature of from 20° C. to 200° C. and a pressure sufficient to maintain liquid phase.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said polymer is crosslinked from about 4.5% to about 6.5%.
Claim 4
Dependent Claim
35 words
The process of claim 1 wherein said adsorption and desorption conditions include a temperature range of from about 20° to about 100° C. and a pressure range of from about atmospheric to about 250 psig.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the weight ratio of calcium to ammonium ions is 2:7 to 8:1.
Claim 6
Dependent Claim
94 words
A process for separating mannose from a mixture of glucose and mannose which comprises contacting said mixture with an adsorbent comprising a sulfonated polystyrene polymer, crosslinked with divinylbenzene in which the exchangeable ionic sites are exchanged with calcium and ammonium ions, selectively adsorbing said mannose, removing the nonadsorbed portion of said mixture from contact with said adsorbent with a desorbent and thereby recovering high purity glucose and desorbent, and separating said mannose by desorption with a desorbent at a temperature from 20° C. or 200° C. and a pressure sufficient to maintain liquid phase.
Claim 7
Dependent Claim
94 words
A process for separating mannose from a mixture of glucose and mannose which comprises contacting said mixture with an adsorbent comprising a sulfonated polystyrene polymer, crosslinked with divinylbenzene in which the exchangeable ionic sites are exchanged with calcium and ammonium ions, selectively adsorbing said mannose, removing the nonadsorbed portion of said mixture from contact with said adsorbent with a desorbent and thereby recovering high purity glucose and desorbent, and separating said mannose by desorption with a desorbent at a temperature from 20° C. or 200° C. and a pressure sufficient to maintain liquid phase.
References Cited (Backward Citations)
US4340724A
Cited
GB1540556A
Cited
US4295994A
Cited
US4298501A
Cited
US4287001A
Cited
US4442285A
Cited
US4444961A
Cited
US4471114A
Cited
US4516566A
Cited
US4581447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |