US3960760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewer waste water treating agent produced from waste cracking catalyst
Assignee: JGC Catalysts and Chemicals Ltd
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Filing: 1974-06-28
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Granted: 1976-06-01
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Expires: 1994-06-28
Abstract
Abstract A sewer waste-water treating agent of superior quality produced by alkali treatment of waste catalyst grains arising from the fluid-bed type catalytic cracking process, said sewer waste-water treating agent being capable of facilitating solid-liquid separation.
Inventors
- 👤 Seiji Sanga
- 👤 Yoichi Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; C; C02; C02F; C02F1/00; C02F1/28; C02F1/281; C02F1/66
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A method of treating waste silica-alumina catalyst particles previously used in a fluid-bed type catalytic cracking process, which consists essentially of the steps of: soaking said waste catalyst particles in an aqueous sodium hydroxide solution having a concentration of from 0.2N to 5N, at a temperature in the range of 70° to 105°C, for from 2 to 48 hours, employing a ratio of from 50 to 100 ml of said aqueous sodium hydroxide solution per 10 grams of said waste catalyst particles; removing the catalyst particles from said aqueous sodium hydroxide solution, washing said particles and drying them to obtain a powder useful for removing ammonium ions and heavy metal ions from waste water.
Claim 2
Independent Claim
114 words
A method of treating waste silica-alumina catalyst particles previously used in a fluid-bed type catalytic cracking process, which consists essentially of the steps of: soaking said waste catalyst particles in an aqueous sodium hydroxide solution having a concentration of from 0.2N to 5N, at a temperature in the range of 70° to 105°C, for from 2 to 48 hours, employing a ratio of from 50 to 100 ml of said aqueous sodium hydroxide solution per 10 grams of said waste catalyst particles; removing the catalyst particles from said aqueous sodium hydroxide solution, washing said particles and drying them to obtain a powder useful for removing ammonium ions and heavy metal ions from waste water.
Claim 3
Dependent Claim
18 words
A method according to claim 1, wherein said silica-alumina catalyst grains have a mean diameter of about 200μ.
References Cited (Backward Citations)
US1636942A
Cited
US2480627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |