US3855076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for purification of effluents containing phenols and ammonium salts
Assignee: Societe pour lEquipement des Industries Chimiques SA
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Filing: 1973-06-06
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Granted: 1974-12-17
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Expires: 1993-06-06
Abstract
Abstract Effluents containing phenols and ammonium salts, e.g., from coke ovens, are purified by adding alkali to release ammonia from the ammonium salts with strong acids, partially evaporating the mixture to remove volatile constituents, incinerating the vapours so produced, evaporating the remainder to produce vapour which is scrubbed with alkali to remove phenols and concentrate which is incinerated.
Inventors
- 👤 P Marecaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:36
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/048; C02F1/58; C02F1/586; C02F11/00; C02F11/06; Y; Y02; Y02W; Y02W10/00; Y02W10/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A METHOD FOR CONTINUOUSLY DESTROYING POLLUTING COMPONENTS OF WASTE WATER, NAMELY EFFLUENTS FROM COKE OVENS, CONTAINING AMONG OTHER IMPURITIES PHENOLIC MATERIALS, AMMONIA AND AMMONIUM SALTS OF VARIOUS ACIDS, INCLUDING STRONG ACIDS, WHICH COMPRISES: CONTINUOUSLY ADDING AN AQUEOUS SOLUTION OF CAUSTIC ALKALI TO THE WASTE WATER TO SUBSTANTIALLY NEUTRALIZE THE SAME AND TO CONVERT AMMONIUM SALTS OF STRONG ACIDS IN THE WASTE WATER INTO AMMONIA AND NEUTRAL SALTS; STRIPPING THE NETURALIZED WASTE WATER TO SEPARATE VOLATILE CONSTITUENTS IN THE GASEOUS STATE; CONTINUOUSLY STAGE DISTILLING THE STRIPPED WASTE WATER AND SCRUBBING THE VAPOR FROM EACH STAGE WITH AN AQUEOUS SOLUTION CONTAINING CAUSING ALKALI; CONTINUOUSLY SUPPLYING AN AQUEOUS SOLUTION OF CAUSTIC ALKALI TO THE FIRST STAGE OF THE DISTILLATION PROCESS AND CIRCULATING SAID CASTIC ALKALI SOLUTION FROM SAID FIRST STAGE THROUGH
Claim 2
Independent Claim
128 words
A METHOD FOR CONTINUOUSLY DESTROYING POLLUTING COMPONENTS OF WASTE WATER, NAMELY EFFLUENTS FROM COKE OVENS, CONTAINING AMONG OTHER IMPURITIES PHENOLIC MATERIALS, AMMONIA AND AMMONIUM SALTS OF VARIOUS ACIDS, INCLUDING STRONG ACIDS, WHICH COMPRISES: CONTINUOUSLY ADDING AN AQUEOUS SOLUTION OF CAUSTIC ALKALI TO THE WASTE WATER TO SUBSTANTIALLY NEUTRALIZE THE SAME AND TO CONVERT AMMONIUM SALTS OF STRONG ACIDS IN THE WASTE WATER INTO AMMONIA AND NEUTRAL SALTS; STRIPPING THE NETURALIZED WASTE WATER TO SEPARATE VOLATILE CONSTITUENTS IN THE GASEOUS STATE; CONTINUOUSLY STAGE DISTILLING THE STRIPPED WASTE WATER AND SCRUBBING THE VAPOR FROM EACH STAGE WITH AN AQUEOUS SOLUTION CONTAINING CAUSING ALKALI; CONTINUOUSLY SUPPLYING AN AQUEOUS SOLUTION OF CAUSTIC ALKALI TO THE FIRST STAGE OF THE DISTILLATION PROCESS AND CIRCULATING SAID CASTIC ALKALI SOLUTION FROM SAID FIRST STAGE THROUGH
Claim 3
Dependent Claim
36 words
A method according to claim 1 wherein heat continuously produced by burning the volatile constituents and the concentrate is used for producing vapor for stripping the neutralized waste water and stage distilling the stripped waste water.
Claim 4
Dependent Claim
25 words
A method according to claim 1 in which the vapor condensed to a liquid is passed in contact with activated carbon before discharging said liquid.
Claim 5
Dependent Claim
45 words
A method according to claim 1 wherein heat for stage distilling the stripped waste water is limited to vaporize about nine-tenths of said waste water whereby the volume of the concentrate to be burned is about one-tenth of the volume of the initial waste water.
Claim 6
Dependent Claim
17 words
A method according to claim 1 wherein the caustic alkali of the aqueous solution is sodium hydroxide.
References Cited (Backward Citations)
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US2056748A
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US2343165A
Cited
US2786082A
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US3299942A
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US3546078A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |