Patent US3844835A successfully refreshed from Google Patents.
US3844835A
Expired / Lapsed
US
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Use of lime in sucrate - factory
Assignee: Raffinerie Tirlemontoise SA
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Filing: 1972-11-15
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Granted: 1974-10-29
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Expires: 1992-11-15
Abstract
Abstract An improvement in the cold precipitation process of sugarfactory molasses by decanting the precipitated molasses prior to filtration and then recirculating at least a portion of the thickened slurries from decantation to additional diluted molasses for the precipitation step prior to the addition of quick-lime thereto.
Inventors
- 👤 G Duchateu
- 👤 R Vandewijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:54
CPC Classifications
C; C13; C13B; C13B35/00; C13B35/02; C13B35/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
IN THE PROCESS FOR COLD TREATMENT OF SUGAR-FACTORY MOLASSES WHEREIN PRECIPITATION OF A SACCHAROSE-LIME COMBINATION IS ACCOMPLISHED BY THE ADDITION OF QUICKLIME TO MOLASSES DILUTE TO MORE THAN 6 PERCENT OF SACCHAROSE AND THE PRECIPITATED MOLASSES IS FILTERED, THE IMPROVEMENT WHICH COMPRISES DECANTING THE PRECIPITATED MOLASSES PRIOR TO FILTRATION AND DIRECTLY RECIRCULATING A PORTION OF THE DECANTATION PRODUCT TO ADDITIONAL DILUTED MOLASSES BEFFORE ADDING THE QUICKLIME THERETO.
Claim 2
Dependent Claim
67 words
IN THE PROCESS FOR COLD TREATMENT OF SUGAR-FACTORY MOLASSES WHEREIN PRECIPITATION OF A SACCHAROSE-LIME COMBINATION IS ACCOMPLISHED BY THE ADDITION OF QUICKLIME TO MOLASSES DILUTE TO MORE THAN 6 PERCENT OF SACCHAROSE AND THE PRECIPITATED MOLASSES IS FILTERED, THE IMPROVEMENT WHICH COMPRISES DECANTING THE PRECIPITATED MOLASSES PRIOR TO FILTRATION AND DIRECTLY RECIRCULATING A PORTION OF THE DECANTATION PRODUCT TO ADDITIONAL DILUTED MOLASSES BEFFORE ADDING THE QUICKLIME THERETO.
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein the amount of the decantation product recirculated to the diluted molasses corresponds to about 2 mols of lime dissolved in diluted molasses per 1 mol of saccharose initially present.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein about 90-120 grams of quicklime are added per 100 grams of saccharose present in the diluted molasses.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein cold filtrate is recirculated either to the precipitation vessel or to the decantation vessel.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein the amount of recirculated filtrate is 10-70 percent of the volume of diluted molasses.
Claim 7
Dependent Claim
18 words
The process of claim 4 wherein the saccharose concentration of the diluted molasses is higher than 12 percent.
Claim 8
Dependent Claim
17 words
The process of claim 4 wherein the concentration of the diluted molasses is higher than 15 percent.
Claim 9
Dependent Claim
21 words
The process of claim 4 wherein up to seven volumes of cold filtrate is recycled per 10 volumes of diluted molasses.
Claim 10
Dependent Claim
29 words
The process of claim 4 wherein several volumes of molasses treated in the precipitation step are recycled and mixed with diluted molasses prior to the addition of quicklime thereto.
Claim 11
Dependent Claim
17 words
The process of claim 7 wherein the sugar-factory molasses is diluted to more than 12 percent saccharose.
Claim 12
Dependent Claim
18 words
The process of claim 7 wherein the sugar-factory molasses is diluted to more than 15 percent of saccharose.
References Cited (Backward Citations)
US2016609A
Cited
US3687727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |