US3088924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of an ionexchange material from the acid sludge resulting from sulphuric acid washing of crude light oils
Assignee: SINDRI FERTILIZERS AND CHEMICA
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Filing: 1959-12-21
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Granted: 1963-05-07
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Chakravorty Kshitish Ranjan
- 👤 Dutta Bimal Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:52
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR PRODUCING ION-EXCHANGE MATERIAL FROM ACID SLUDGE, CONSISTING ESSENTIALLY IN (A) HEATING THE ACID SLUDGE OBTAINED BY THE SULFURIC ACID-WASHING OF CRUDE LIGHT OILS IN BY-PRODUCT RECOVERY PLANTS OF COKE OVER INDUSTRIES, TO A TEMPERATURE IN THE RANGE OF 50*C. TO 150*C., (B) SEPARATING THE RESULTING SUPERNATANT RESINOUS LAYER FROM THE ACID RESIDUAL LAYER, (C) DISENTEGRATING THE RESULTING RESINOUS LUMPS, AND (D) WASHING WITH WATER UNTIL THE RESIN END PRODUCT IS SUBSTANTIALLY ACID FREE.
Claim 2
Dependent Claim
76 words
A PROCESS FOR PRODUCING ION-EXCHANGE MATERIAL FROM ACID SLUDGE, CONSISTING ESSENTIALLY IN (A) HEATING THE ACID SLUDGE OBTAINED BY THE SULFURIC ACID-WASHING OF CRUDE LIGHT OILS IN BY-PRODUCT RECOVERY PLANTS OF COKE OVER INDUSTRIES, TO A TEMPERATURE IN THE RANGE OF 50*C. TO 150*C., (B) SEPARATING THE RESULTING SUPERNATANT RESINOUS LAYER FROM THE ACID RESIDUAL LAYER, (C) DISENTEGRATING THE RESULTING RESINOUS LUMPS, AND (D) WASHING WITH WATER UNTIL THE RESIN END PRODUCT IS SUBSTANTIALLY ACID FREE.
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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |