US3762948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rejuvenation of deteriorated anion exchange resins occluded with organic impurities
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1971-07-02
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Granted: 1973-10-02
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Expires: 1991-07-02
Abstract
Abstract Anionic exchange resins exhibiting a reduced syrup refining capacity are rejuvenated to a useful state by treating the anionic exchange resins at a temperature of at least 170* F. with a concentrated acid solution for a period of time and under conditions sufficient to remove therefrom the occluded organic impurities which interfere with its anionic exchange capacity.
Inventors
- 👤 D Morton
- 👤 R Leiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:16
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06; C13K1/08; B; B01; B01J; B01J49/00; B01J49/50; B01J49/57
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
26 words
The method according to claim 1 wherein the treated resin has an anion exchange capacity of at least 50 percent of its original anion exchange capacity.
Claim 2
Dependent Claim
18 words
The method according to claim 1 wherein the anion exchange resin is a weak base anion exchange resin.
Claim 3
Dependent Claim
28 words
The method according to claim 1 wherein the anion exchange resin is a weak base anion exchange resin of a cross-linked phenol-formaldehyde matrix containing cationic tertiary amine groups.
Claim 4
Dependent Claim
32 words
The method according to claim 4 wherein the acid is a strong mineral acid having a normality of at least 4 and the temperature during the treatment is at least 180* F.
Claim 5
Dependent Claim
42 words
The method according to claim 1 wherein the weak base anion exchange resin occluded with conversion syrup organic impurities is treated under conditions sufficient to increase the anion exchange resin capacity of the deteriorated resin by at least 0.1 eq./l. of resin.
Claim 6
Dependent Claim
26 words
The method according to claim 6 wherein the anion exchange resin is a weak base resin of a cross-linked phenol-formaldehyde matrix containing cationic tertiary amine groups.
Claim 7
Dependent Claim
24 words
The method according to claim 1 wherein the treated resin is reused as an anion exchange resin in the refining of aqueous saccharide mediums.
Claim 8
Dependent Claim
49 words
The method according to claim 8 wherein the resin is occluded with organic impurities consisting essentially of impurities resulting from the refining of corn starch conversion syrups having on a solids weight basis at least one major ingredient selected from the group consisting of dextrose, maltose and mixtures thereof.
Claim 9
Dependent Claim
51 words
The method according to claim 9 wherein the temperature is at least 180* F., the acid is a strong acid aqueous solution having a normality of at least 4 and the anion exchange resin is a weak base anion exchange resin of a crosslinked phenol-formaldehyde matrix containing cationic tertiary amine groups.
Claim 10
Dependent Claim
40 words
The method according to claim 1 wherein the occluded organic impurities result from the refining of aqueous mediums which contain a fermentable saccharide as a principal constitUent on a dry solids weight basis and the acid is a strong acid.
Claim 11
Dependent Claim
28 words
The method according to claim 11 wherein the occluded impurities consist essentially of impurities resulting from the refining of a syrup containing sucrose as a major saccharide constituent.
Claim 12
Dependent Claim
27 words
The method according to claim 11 wherein the occluded organic impurities result from refining of starch hydrolyzates having a D.E. ranging from about 10 to about 100.
Claim 13
Dependent Claim
51 words
The method according to claim 13 wherein the starch hydrolyzate is a hydrolyzate of a corn starch which contains fermentable sugars as a major dry solids constituent on a weight basis and the strong acid is at least one member selected from the group consisting of hydrochloric acid and sulfuric acid.
Claim 14
Dependent Claim
32 words
The method according to claim 14 wherein the temperature ranges from about 190* F. to about 210* F. and the normality of the acid solution ranges from about 5 to about 10.
Claim 15
Dependent Claim
44 words
The method according to claim 13 wherein the anion exchange resin is primarily occluded with impurities of a corn starch hydrolysis origin and the anion exchange resin is a weak base anion exchange resin of a crosslinked phenol-formaldehyde matrix containing cationic tertiary amino groups.
Claim 16
Dependent Claim
32 words
The method according to claim 16 wherein the treatment increases the anion exchange resin capacity of the deteriorated resin by a value of at least 0.2 to about 0.4 eq./l. of resin.
Claim 17
Dependent Claim
28 words
The method according to claim 17 wherein the occluded impurities are due to the refining of a conversion syrup containing at least 90 percent by weight dextrose solids.
Claim 18
Dependent Claim
16 words
The method according to claim 17 wherein the conversion syrup has a minimum D.E. of 38.
Claim 19
Dependent Claim
20 words
The method according to claim 17 wherein the treated resin is subsequently employed to refine a corn syrup conversion product.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |