US2675412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the recovery of solvents from waste gases resulting in extraction processes
Assignee: GEA Group AG
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Filing: 1950-10-25
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Granted: 1954-04-13
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Expires: 1970-10-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert Wilhelm
- 👤 Grob Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/26; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/72; C02F1/02; C02F1/04; C07C37/685; C07C37/74; C07C39/00; C07C39/02; C07C39/04; C02F2101/00; C02F2101/30; C02F2101/34; C02F2101/345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN THE METHOD FOR THE EXTRACTION OF PHENOLS FROM PHENOL CONTAINING WASTE WATERS BY CONTACTING THE WASTE WATER WITH AN ORGANIC SOLVENT HAVING A SUBSTANTIALLY LOW SOLUBILITY IN WATER, SEPARATING THE ORGANIC SOLVENT CONTAINING EXTRACTED PHENOL FROM THE WASTE WATER, SEPARATING THE EXTRACTED PHENOL FROM THE ORGANIC SOLVENT AND RECOVERING THE RESIDUE ORGANIC SOLVENT FROM THE WASTE WATER BY DISTILLATION AND CONDENSATION OF SOLVENT AND WATER, THE IMPROVEMENT FOR THE RECOVERY OF RESIDUE ORGANIC SOLVENT FROM CARBON DIOXIDE AND HYDROGEN SULFIDE CONTAINING GASES OBTAINED FROM THE DISTILLATION AFTER THE CONDENSATION WHICH COMPRISES INTIMATELY CONTACTING SUCH A CARBON DIOXIDE HYDROGEN SULFIDE CONTAINING GAS WITH AT LEAST A PORTION OF THE EXTRACTED PHENOLS FOR THE ABSORPTION OF ORGANIC SOLVENT FROM THE GASES, AND RECOVERING THE ABSORBED ORGANIC SOLVENT FROM THE EXTRACTED PHENOLS AFTER SAID CONTACTING.
Claim 2
Dependent Claim
133 words
IN THE METHOD FOR THE EXTRACTION OF PHENOLS FROM PHENOL CONTAINING WASTE WATERS BY CONTACTING THE WASTE WATER WITH AN ORGANIC SOLVENT HAVING A SUBSTANTIALLY LOW SOLUBILITY IN WATER, SEPARATING THE ORGANIC SOLVENT CONTAINING EXTRACTED PHENOL FROM THE WASTE WATER, SEPARATING THE EXTRACTED PHENOL FROM THE ORGANIC SOLVENT AND RECOVERING THE RESIDUE ORGANIC SOLVENT FROM THE WASTE WATER BY DISTILLATION AND CONDENSATION OF SOLVENT AND WATER, THE IMPROVEMENT FOR THE RECOVERY OF RESIDUE ORGANIC SOLVENT FROM CARBON DIOXIDE AND HYDROGEN SULFIDE CONTAINING GASES OBTAINED FROM THE DISTILLATION AFTER THE CONDENSATION WHICH COMPRISES INTIMATELY CONTACTING SUCH A CARBON DIOXIDE HYDROGEN SULFIDE CONTAINING GAS WITH AT LEAST A PORTION OF THE EXTRACTED PHENOLS FOR THE ABSORPTION OF ORGANIC SOLVENT FROM THE GASES, AND RECOVERING THE ABSORBED ORGANIC SOLVENT FROM THE EXTRACTED PHENOLS AFTER SAID CONTACTING.
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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |