US4353992A
Expired / Lapsed
US
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Process for the regeneration of a sorbent
Assignee: Akzona Inc
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Filing: 1980-12-18
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Granted: 1982-10-12
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Expires: 2000-12-18
Abstract
Abstract A process is disclosed for the regeneration of a sorbent, particularly an ion exchanger used in the recovery, isolation or production of sugars, wherein a regeneration solution is used which contains at least 20 meq/l of an alkali metal hydroxide or hydroxide of an alkaline earth metal having an atomic number of at least 20, and at least 1% by weight of a monosaccharide or disaccharide.
Inventors
- 👤 Wilhelmus Pannekeet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14; B; B01; B01J; B01J49/00; B01J49/50; B01J49/53
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
A process for regenerating an ion exchange resin sorbent which comprises washing said sorbent with an aqueous alkaline solution containing at least 20 meq/l. of an alkali metal hydroxide or alkaline earth metal hydroxide having an atomic number of at least 20, and at least one percent by weight of a monosaccharide or disaccharide.
Claim 2
Dependent Claim
54 words
A process for regenerating an ion exchange resin sorbent which comprises washing said sorbent with an aqueous alkaline solution containing at least 20 meq/l. of an alkali metal hydroxide or alkaline earth metal hydroxide having an atomic number of at least 20, and at least one percent by weight of a monosaccharide or disaccharide.
Claim 3
Dependent Claim
11 words
The process of claim 1, wherein the hydroxide is sodium hydroxide.
Claim 4
Dependent Claim
11 words
The process of claim 1, wherein the hydroxide is calcium hydroxide.
Claim 5
Dependent Claim
10 words
The process of claim 1, wherein the disaccharide is saccharose.
Claim 6
Dependent Claim
15 words
The process of claim 4, wherein the aqueous solution contains 5-75% by weight of saccharose.
Claim 7
Dependent Claim
19 words
The process of claim 1, wherein the aqueous solution contains about 0.2 to about 4 eq/l of the hydroxide.
Claim 8
Dependent Claim
34 words
The process of claims 1, 2, 3, 4 or 6 wherein the regeneration is carried out at a temperature in the range of from the solidifying point to the boiling point of the solution.
Claim 9
Dependent Claim
23 words
The process of claim 7, wherein the regeneration is carried out at a temperature in the range of from 5° to 90° C.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the said ion exchange resin is washed with water after washing with said aqueous alkaline solution.
References Cited (Backward Citations)
US2482765A
Cited
US3791866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |