US3228891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing spherical bauxite adsorbent granules
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1962-08-17
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Granted: 1966-01-11
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Expires: 1982-08-17
Abstract
No abstract record available.
Inventors
- 👤 James B Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:48
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01D; B01D2253/00; B01D2253/10; B01D2253/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF PRODUCING HARD SPHERICAL BAUXITE ADSORBENT PELLETS WHICH COMPRISES INCORPORATING A SMALL AMOUNT OF AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE INTO BAUXITE FINES WHILE PUGGING SAID FINES, THEREBY TO COAT SAID FINES WITH SAID AQUEOUS SOLUTION OF SODIUM HYDROXIDE, SAID AQUEOUS SOLUTION BEING EMPLOYED IN AMOUNT SUFFICIENT TO PROVIDE A 1% TO 6% SODIUM HYDROXIDE DOSAGE AND BEING SUFFICIENTLY CONCENTRATED THAT SAID FINES DO NOT FORM BALLS UPON BEING PUGGED THEREWITH, WHILE PUGGING SAID SODIUM HYDROXIDE COATED BAUXITE FINES, GRADUALLY ADDING THERETO WAER SUFFICIENT TO AGGLOMERATE ALL OF SAID SODIUM HYDROXIDE COATED BAUXITE FINES INTO SPHERICAL PELLETS AND, WITHOUT WASHING SAID SPHERICAL PELLETS, CALCINING THEM OUT OF DIRECT CONTACT WITH COMBUSTION GASES AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO REDUCE THE VOLATILE MATTER CONTENT OF SAID SPHERES TO AN AMOUNT WITHIN THE RANGE OF ABOUT 1% TO 15%.
Claim 2
Independent Claim
142 words
A METHOD OF PRODUCING HARD SPHERICAL BAUXITE ADSORBENT PELLETS WHICH COMPRISES INCORPORATING A SMALL AMOUNT OF AN AQUEOUS SOLUTION OF SODIUM HYDROXIDE INTO BAUXITE FINES WHILE PUGGING SAID FINES, THEREBY TO COAT SAID FINES WITH SAID AQUEOUS SOLUTION OF SODIUM HYDROXIDE, SAID AQUEOUS SOLUTION BEING EMPLOYED IN AMOUNT SUFFICIENT TO PROVIDE A 1% TO 6% SODIUM HYDROXIDE DOSAGE AND BEING SUFFICIENTLY CONCENTRATED THAT SAID FINES DO NOT FORM BALLS UPON BEING PUGGED THEREWITH, WHILE PUGGING SAID SODIUM HYDROXIDE COATED BAUXITE FINES, GRADUALLY ADDING THERETO WAER SUFFICIENT TO AGGLOMERATE ALL OF SAID SODIUM HYDROXIDE COATED BAUXITE FINES INTO SPHERICAL PELLETS AND, WITHOUT WASHING SAID SPHERICAL PELLETS, CALCINING THEM OUT OF DIRECT CONTACT WITH COMBUSTION GASES AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO REDUCE THE VOLATILE MATTER CONTENT OF SAID SPHERES TO AN AMOUNT WITHIN THE RANGE OF ABOUT 1% TO 15%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |