US3928062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for obtaining anhydrous fructose crystals
Assignee: DKS Co Ltd
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Filing: 1974-01-22
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Granted: 1975-12-23
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Expires: 1994-01-22
Abstract
Abstract Anhydrous fructose crystals are obtained from a supersaturated fructose solution in water by seeding anhydrous crystals into the solution, concentrating and/or cooling the solution while maintaining the sugar concentration and temperature in the liquid phase within a certain range, and then recovering the anhydrous fructose crystals from the massecuite.
Inventors
- 👤 Toshio Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:41
CPC Classifications
C; C13; C13K; C13K11/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
A PROCESS FOR OBTAINING ANHYDROUS FRUCTOSE CRYSTALS WITHOUT THE FORMATION OF FRUCTOSE HEMIHYDRATE OR FRUCTOSE DIHYDRATE CRYSTALS FROM AN AQUEOUS SOLUTION OF FRUTOSE, WHICH COMPRISES: A. SEEDING ANHYDROUS FRUCTOSE CRYSTALS INOT A METASTABLE SUPERSATURATED SOLUTION OF FRUCTOSE IN WATER HAVING AN INITIAL SUGAR CONCENTRATION OF LESS THAN 92% (DRY BASIS) OF TOTAL SUGAR COMPRISING 88-99% FRUCTOSE AND A TEMPERATURE OF 25*-60*C. LOCATED AT A POINT WITHIN THE RANGE DEFINED BY POINTS G, H, C AND D IN FIG. 1 OF THE ACCOMPANYING DRAWING; B. SIMULTANEOUSLY CRYSTALLIZING ANHYDROUS FRUCTOSE FROM SAID SOLUTION AND CONCENTRATING SAID SOLUTION BY EVAPORATION UNDER REDUCED PRESSURE AT A RATE SUFFICIENT TO SHIFT THE EQUILIBRIUM BETWEEN THE SOLID AND LIQUID PHASES OF THE RESULTANT SYSTEM IN A DIRECTION WHICH INCREASES THE DEGREE OF SUPERSATURATION OF THE LIQUID PHASE WIHTIN SAID RANGE TO CONTINUOUSLY CRYSTALLIZE ANHYDROUS FRUCTOSE FROM SAID METASTABLE SUPERSATURATED SOLUTION WITHOUT THE FORMATION OF HEMIHYDRATE OR DIHYDRATE CRYSTALS; AND C. RECOVERING ANHYDROUS FRUCTOSE CRYSTALS FROM THE RESULTANT MOTHER LIQUOR HAVING A FRUCTOSE CONCENTRATION WITHIN SAID RANGE.
Claim 2
Dependent Claim
170 words
A PROCESS FOR OBTAINING ANHYDROUS FRUCTOSE CRYSTALS WITHOUT THE FORMATION OF FRUCTOSE HEMIHYDRATE OR FRUCTOSE DIHYDRATE CRYSTALS FROM AN AQUEOUS SOLUTION OF FRUTOSE, WHICH COMPRISES: A. SEEDING ANHYDROUS FRUCTOSE CRYSTALS INOT A METASTABLE SUPERSATURATED SOLUTION OF FRUCTOSE IN WATER HAVING AN INITIAL SUGAR CONCENTRATION OF LESS THAN 92% (DRY BASIS) OF TOTAL SUGAR COMPRISING 88-99% FRUCTOSE AND A TEMPERATURE OF 25*-60*C. LOCATED AT A POINT WITHIN THE RANGE DEFINED BY POINTS G, H, C AND D IN FIG. 1 OF THE ACCOMPANYING DRAWING; B. SIMULTANEOUSLY CRYSTALLIZING ANHYDROUS FRUCTOSE FROM SAID SOLUTION AND CONCENTRATING SAID SOLUTION BY EVAPORATION UNDER REDUCED PRESSURE AT A RATE SUFFICIENT TO SHIFT THE EQUILIBRIUM BETWEEN THE SOLID AND LIQUID PHASES OF THE RESULTANT SYSTEM IN A DIRECTION WHICH INCREASES THE DEGREE OF SUPERSATURATION OF THE LIQUID PHASE WIHTIN SAID RANGE TO CONTINUOUSLY CRYSTALLIZE ANHYDROUS FRUCTOSE FROM SAID METASTABLE SUPERSATURATED SOLUTION WITHOUT THE FORMATION OF HEMIHYDRATE OR DIHYDRATE CRYSTALS; AND C. RECOVERING ANHYDROUS FRUCTOSE CRYSTALS FROM THE RESULTANT MOTHER LIQUOR HAVING A FRUCTOSE CONCENTRATION WITHIN SAID RANGE.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein the concentrating is carried out at a substantially constant temperature.
Claim 4
Dependent Claim
19 words
A process according to claim 1, wherein said fructose solution is the mother liquor from a previous crystallization cycle.
Claim 5
Dependent Claim
46 words
A process according to claim 1, further comprising adding 10-30 parts by weight of a fresh fructose solution or the mother liquor from a previous crystallization cycle to 100 parts by weight of the massecuite at the final stage of crystallization before separation of said crystals.
Claim 6
Dependent Claim
33 words
A process according to claim 1, further comprising centrifuging the resultant massecuite at 30*-50* C., washing the resultant crystals with warm water and drying the washed crystals at 50*-60* C. under reduced pressure.
Claim 7
Dependent Claim
39 words
A process according to claim 1, wherein the concentrating is carried out with gradual cooling at the rate of 0.2*-1.5* C. per hour such that the resultant increase in crystallization speed becomes a linear function of the operation time.
Claim 8
Dependent Claim
19 words
A process according to claim 6, wherein said cooling is at the rate of about 0.3* C. per hour.
Claim 9
Dependent Claim
25 words
A process according to claim 1, wherein said fructose solution has a sugar concentration of less than 90% by weight and a pH of 3.9-5.7.
Claim 10
Dependent Claim
35 words
A process according to claim 8, wherein said fructose solution is seeded with 1-4% by weight of seed crystals having a particle size of 100-500 mesh (Tyler) and then evacuated to remove air bubbles therefrom.
Claim 11
Dependent Claim
18 words
A process according to claim 9, wherein the concentrating is carried out at a pressure of 10-60mm Hg.
References Cited (Backward Citations)
US2007971A
Cited
US2588449A
Cited
US3513023A
Cited
US3607392A
Cited
US3684574A
Cited
US3883365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |