US3288450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for recovering substances with a high alkali percentage fromthe flue gases of cement kilns
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1963-11-19
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Granted: 1966-11-29
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Bade Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:03
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/60; F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A METHOD OF RECOVERING ALKALI FROM ALKALI CONTAINING FLUE GASES OF A CEMENT KILN, PREHEATING THE CEMENT RAW MATERIAL TO BE BURNED BY DIRECT CONTACT WITH THE FLUE GASES FROM THE CEMENT KILN, CONTACTING THE FLUE GAS PRIOR TO PREHEATING THE CEMENT RAW MATERIAL WITH A COLD FINEGRAINED MATERIAL TO CAUSE THE ALKALI TO SETTLE ON SAID FINEGRAINED MATERIAL, AND EFFECTING SEPARATION OF THE SAID FINEGRAINED MATERIAL AND THE ALKALI SETTLED THEREON FROM THE FLUE GASES AND, PRIOR TO SAID FLUE GASES BEING CONTACTED WITH SAID COLD FINE-GRAINED MATERIAL, AND WHILE THE ALKALI IN SAID FLUE GASES IS STILL IN A GASEOUS CONDITION, REMOVING FROM SAID FLUE GASES CEMENT DUST CARRIED BY SAID FLUE GASES.
Claim 2
Dependent Claim
116 words
IN A METHOD OF RECOVERING ALKALI FROM ALKALI CONTAINING FLUE GASES OF A CEMENT KILN, PREHEATING THE CEMENT RAW MATERIAL TO BE BURNED BY DIRECT CONTACT WITH THE FLUE GASES FROM THE CEMENT KILN, CONTACTING THE FLUE GAS PRIOR TO PREHEATING THE CEMENT RAW MATERIAL WITH A COLD FINEGRAINED MATERIAL TO CAUSE THE ALKALI TO SETTLE ON SAID FINEGRAINED MATERIAL, AND EFFECTING SEPARATION OF THE SAID FINEGRAINED MATERIAL AND THE ALKALI SETTLED THEREON FROM THE FLUE GASES AND, PRIOR TO SAID FLUE GASES BEING CONTACTED WITH SAID COLD FINE-GRAINED MATERIAL, AND WHILE THE ALKALI IN SAID FLUE GASES IS STILL IN A GASEOUS CONDITION, REMOVING FROM SAID FLUE GASES CEMENT DUST CARRIED BY SAID FLUE GASES.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |