US3177151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing spherical catalyst pellets
Assignee: Oxy Catalyst Inc
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Filing: 1961-01-10
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Granted: 1965-04-06
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Expires: 1981-01-10
Abstract
No abstract record available.
Inventors
- 👤 Willard R Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:22
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01F; B01F29/00; B01F29/20; B01F29/40; B01F29/401; B01F29/4011; B01F29/40118; B01F29/403; B01F29/4036; B01F29/40363; B01F29/60; B01F29/64; B01J21/00; B01J21/02; B01J21/04; B01J35/00; B01J35/50; B01J35/51; B01F29/402; B01F29/4021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
205 words
THE STEPS IN THE METHOD OF MAKING SUBSTANTIALLY SPHERICAL CATALYST PELLETS HAVING A DIAMETER OF FROM ABOUT .020" TO ABOUT 9100" WHICH COMPRISES SPRAYING A PHOSPHORIC ACID SOLUTION CONTAINING FROM ABOUT 18% TO 72% BY WEIGHT OF PHOSPHORIC ACID INTO A MIXTURE OF (A) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER OF LESS THAN ONE MICRON AND (B) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER IN THE RANGE OF FROM 10 MICRONS TO 100 MICRONS, THE PHOSPHORIC ACID IN THE SAID SOLUTION BEING IN AN AMOUNT OF FROM ABOUT 5.7% TO ABOUT 14.3% BY WEIGHT OF THE TOTAL WEIGHT OF THE SAID MIXTURE AND THE FIRST MENTIONED ALUMINA TRIHYDRATE BEING FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF SAID MIXTURE TUMBLING SAID MIXTURE OF ALUMINA TRIHYDRATES DURING THE SPRAYING AND SUBSEQUENT THERETO, QUENCHING THE THUS FORMED SUBSTANTIALLY SPHERICAL PELLETS WITH AN ALUMINA TRIHYDRATE QUENCHING POWDER, HEATING THE PELLETS AT A TEMPERATURE IN THE RANGE OF FROM AMBIENT TO ABOUT 212*F. TO HARDEN THE PELLETS, SEPARATING OUT THE PELLETS IN THE RANGE OF FROM ABOUT .22 INCH TO ABOUT .11 INCH AND THEN MAKING THE THUS SEPARATED PELLETS CATALYTICALLY ACTIVE BY HEATING TO DECOMPOSE THE AL(OH)3 TO A MIXTURE OF ALO(OH) AND AL2O3.
Claim 2
Dependent Claim
205 words
THE STEPS IN THE METHOD OF MAKING SUBSTANTIALLY SPHERICAL CATALYST PELLETS HAVING A DIAMETER OF FROM ABOUT .020" TO ABOUT 9100" WHICH COMPRISES SPRAYING A PHOSPHORIC ACID SOLUTION CONTAINING FROM ABOUT 18% TO 72% BY WEIGHT OF PHOSPHORIC ACID INTO A MIXTURE OF (A) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER OF LESS THAN ONE MICRON AND (B) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER IN THE RANGE OF FROM 10 MICRONS TO 100 MICRONS, THE PHOSPHORIC ACID IN THE SAID SOLUTION BEING IN AN AMOUNT OF FROM ABOUT 5.7% TO ABOUT 14.3% BY WEIGHT OF THE TOTAL WEIGHT OF THE SAID MIXTURE AND THE FIRST MENTIONED ALUMINA TRIHYDRATE BEING FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF SAID MIXTURE TUMBLING SAID MIXTURE OF ALUMINA TRIHYDRATES DURING THE SPRAYING AND SUBSEQUENT THERETO, QUENCHING THE THUS FORMED SUBSTANTIALLY SPHERICAL PELLETS WITH AN ALUMINA TRIHYDRATE QUENCHING POWDER, HEATING THE PELLETS AT A TEMPERATURE IN THE RANGE OF FROM AMBIENT TO ABOUT 212*F. TO HARDEN THE PELLETS, SEPARATING OUT THE PELLETS IN THE RANGE OF FROM ABOUT .22 INCH TO ABOUT .11 INCH AND THEN MAKING THE THUS SEPARATED PELLETS CATALYTICALLY ACTIVE BY HEATING TO DECOMPOSE THE AL(OH)3 TO A MIXTURE OF ALO(OH) AND AL2O3.
Claim 3
Dependent Claim
184 words
THE STEPS IN THE METHOD OF MAKING SUBSTANTIALLY APHERICAL ALUMINA TRIHYDRATE-ALUMINUMPHOSPHATE PELLETS HAVING A DIAMETER OF FROM ABOUT .016" TO ABOUT .033" WHICH COMPRISES SPRAYING A PHOSPHORIC ACID SOLUTION CONTAINING FROM ABOUT 18% TO 72% BY WEIGHT OF PHOSPHORIC ACID INTO A MIXTURE OF (A) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER OF LESS THAN ONE MICRON AND (B) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER IN THE RANGE OF FROM 10 MICRONS TO 100 MICRONS, THE PHOSPHORIC ACID IN THE SAID SOLUTION BEING IN AN AMOUNT OF FROM ABOUT 5.7% TO ABOUT 14.3% BY WEIGHT OF THE TOTAL WEIGHT OF THE SAID MIXTURE AND THE FIRST MENTIONED ALUMINA TRIHYDRATE BEING FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF SAID MIXTURE TUMBLING SAID MIXTURE OF ALUMINA TRIHYDRATES DURING THE SPRAYING AND SUBSEQUENT THERETO, QUEWNCHING THE THUS FORMED SUBSTANTIALLY SPHERICAL PELLETS WITH AN ALUMINA TRIHYDRATE QUENCHING POWDER, HEATING THE PELLETS AT A TEMPERATURE IN THE RANGE OF FROM AMBIENT OT ABOUT 212*F TO HARDEN THE PELLETS, SEPARATING OUT THE PELLETS IN THE RANGE OF FROM ABOUT .22 INCH TO ABOUT .11 INCH.
Claim 4
Dependent Claim
184 words
THE STEPS IN THE METHOD OF MAKING SUBSTANTIALLY APHERICAL ALUMINA TRIHYDRATE-ALUMINUMPHOSPHATE PELLETS HAVING A DIAMETER OF FROM ABOUT .016" TO ABOUT .033" WHICH COMPRISES SPRAYING A PHOSPHORIC ACID SOLUTION CONTAINING FROM ABOUT 18% TO 72% BY WEIGHT OF PHOSPHORIC ACID INTO A MIXTURE OF (A) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER OF LESS THAN ONE MICRON AND (B) ALUMINA TRIHYDRATE HAVING AN AVERAGE SURFACE PARTICLE DIAMETER IN THE RANGE OF FROM 10 MICRONS TO 100 MICRONS, THE PHOSPHORIC ACID IN THE SAID SOLUTION BEING IN AN AMOUNT OF FROM ABOUT 5.7% TO ABOUT 14.3% BY WEIGHT OF THE TOTAL WEIGHT OF THE SAID MIXTURE AND THE FIRST MENTIONED ALUMINA TRIHYDRATE BEING FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF SAID MIXTURE TUMBLING SAID MIXTURE OF ALUMINA TRIHYDRATES DURING THE SPRAYING AND SUBSEQUENT THERETO, QUEWNCHING THE THUS FORMED SUBSTANTIALLY SPHERICAL PELLETS WITH AN ALUMINA TRIHYDRATE QUENCHING POWDER, HEATING THE PELLETS AT A TEMPERATURE IN THE RANGE OF FROM AMBIENT OT ABOUT 212*F TO HARDEN THE PELLETS, SEPARATING OUT THE PELLETS IN THE RANGE OF FROM ABOUT .22 INCH TO ABOUT .11 INCH.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |