Patent US4252571A successfully refreshed from Google Patents.
US4252571A
Expired / Lapsed
US
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Bone char and activated carbon mixtures for sugar liquor purification
Assignee: Calgon Carbon Corp
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Filing: 1979-11-21
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Granted: 1981-02-24
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Expires: 1999-11-21
Abstract
Abstract An admixture of granular activated carbon (GAC) and bone char (BC) can be effectively employed to decolorize and to deash white cane sugar liquors. Use of this admixture in place of bone char exclusively results in significantly improved decolorization. The GAC/BC admixture can be effectively reactivated at a temperature within the limit of 900° F. to 1200° F.
Inventors
- 👤 Phillip B. Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:36
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/12; C13B20/123; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
In a system of decolorizing and deashing cane sugar liquor wherein the cane sugar liquor is passed through a carbon-containing filter to remove ash and color, the improvement consisting of providing a bed comprising an admixture of from about 10 percent to 50 percent by weight granular activated carbon and from about 50 percent to 90 percent by weight granular bone char.
Claim 2
Dependent Claim
62 words
In a system of decolorizing and deashing cane sugar liquor wherein the cane sugar liquor is passed through a carbon-containing filter to remove ash and color, the improvement consisting of providing a bed comprising an admixture of from about 10 percent to 50 percent by weight granular activated carbon and from about 50 percent to 90 percent by weight granular bone char.
Claim 3
Dependent Claim
23 words
A system according to claim 1 wherein the bed contains from about 10 percent to about 30 percent by weight granular activated carbon.
Claim 4
Dependent Claim
21 words
A system according to claim 1 wherein the granular size of the bone char and activated carbon is from 8×50 mesh.
Claim 5
Dependent Claim
63 words
In a process for deashing and decolorizing cane sugar liquor wherein the liquor is passed through a carbon-containing material for decolorizing and deashing, the improvement consisting of passing the sugar liquor through a bed comprising an admixture of from about 10 percent to 50 percent by weight granular activated carbon and from about 50 to 90 percent by weight of granular bone char.
Claim 6
Dependent Claim
63 words
In a process for deashing and decolorizing cane sugar liquor wherein the liquor is passed through a carbon-containing material for decolorizing and deashing, the improvement consisting of passing the sugar liquor through a bed comprising an admixture of from about 10 percent to 50 percent by weight granular activated carbon and from about 50 to 90 percent by weight of granular bone char.
Claim 7
Dependent Claim
23 words
A system according to claim 4 wherein the bed contains from about 10 percent to about 30 percent by weight granular activated carbon.
Claim 8
Dependent Claim
22 words
A process according to claim 4 wherein the granular size of the bone char and activated carbon is at least 8×50 mesh.
Claim 9
Dependent Claim
47 words
An admixture of bone char and activated carbon for removal of color bodies and ash from cane sugar liquor comprising from 10 percent to 50 percent by weight of a granular activated carbon and from 50 percent to 90 percent by weight of a granular bone char.
Claim 10
Dependent Claim
47 words
An admixture of bone char and activated carbon for removal of color bodies and ash from cane sugar liquor comprising from 10 percent to 50 percent by weight of a granular activated carbon and from 50 percent to 90 percent by weight of a granular bone char.
Claim 11
Dependent Claim
23 words
A system according to claim 7 wherein the bed contains from about 10 percent to about 30 percent by weight granular activated carbon.
Claim 12
Dependent Claim
18 words
An admixture according to claim 7 where the granular bone char and activated carbon is about 8×50 mesh.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |