Patent US1898474A successfully refreshed from Google Patents.
Patent US2950180A successfully refreshed from Google Patents.
US2950180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical reactor tower
Assignee: BASF SE
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Filing: 1958-03-19
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Granted: 1960-08-23
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Expires: 1978-03-19
Abstract
No abstract record available.
Inventors
- 👤 Kunzer Werner
- 👤 Leutert Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:52
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN AN APPARATUS FOR THE RECOVERY OF HYDROGEN CHLORIDE WHEREIN A SINGLE ABSORPTION TOWER IS PROVIDED WITH AN ABSORPTION ZONE INTERMEDIATE OF THE TOWER, MEANS TO INTRODUCE AN AQUEOUS ABSORPTION LIQUID AND MEANS TO REMOVE EFFLUENT FLUIDS LOCATED ABOVE SAID ABSORPTION ZONE IN SAID TOWER, AN INDIRECT HEAT EXCHANGER ZONE, AND BOTTOM OF SAID TOWER BENEATH SAID ABSORPTION ZONE, AND MEANS TO WITHDRAW HYDROCHLORIC ACID FROM SAID TOWER BELOW SAID HEAT EXCHANGER, THE IMPROVEMENT WHICH COMPRISES: A BURNER LOCATED WITHIN SAID TOWER BETWEEN THE ABSORPTION ZONE AND SAID HEAT EXCHANGER FOR THE PRODUCTION OF HYDROGEN CHLORIDE, MEANS TO INTRODUCE REACTANT GASES TO SAID BURNER, AND A BURNER CHAMBER POSITIONED ABOVE SAID BURNER BUT BELOW SAID ABSORPTION ZONE, SAID BURNER CHAMBER HAVING A CLOSED TOP AND SIDE WALLS SPACED INWARDLY FROM THE INNER WALLS OF SAID TOWER, THE SIDE WALLS HAVING OIPENINGS FOR THE PASSAGE OF HYDROGEN CHLORIDE GAS UPWARDLY INTO SAID ABSORPTION ZONE.
Claim 2
Dependent Claim
153 words
IN AN APPARATUS FOR THE RECOVERY OF HYDROGEN CHLORIDE WHEREIN A SINGLE ABSORPTION TOWER IS PROVIDED WITH AN ABSORPTION ZONE INTERMEDIATE OF THE TOWER, MEANS TO INTRODUCE AN AQUEOUS ABSORPTION LIQUID AND MEANS TO REMOVE EFFLUENT FLUIDS LOCATED ABOVE SAID ABSORPTION ZONE IN SAID TOWER, AN INDIRECT HEAT EXCHANGER ZONE, AND BOTTOM OF SAID TOWER BENEATH SAID ABSORPTION ZONE, AND MEANS TO WITHDRAW HYDROCHLORIC ACID FROM SAID TOWER BELOW SAID HEAT EXCHANGER, THE IMPROVEMENT WHICH COMPRISES: A BURNER LOCATED WITHIN SAID TOWER BETWEEN THE ABSORPTION ZONE AND SAID HEAT EXCHANGER FOR THE PRODUCTION OF HYDROGEN CHLORIDE, MEANS TO INTRODUCE REACTANT GASES TO SAID BURNER, AND A BURNER CHAMBER POSITIONED ABOVE SAID BURNER BUT BELOW SAID ABSORPTION ZONE, SAID BURNER CHAMBER HAVING A CLOSED TOP AND SIDE WALLS SPACED INWARDLY FROM THE INNER WALLS OF SAID TOWER, THE SIDE WALLS HAVING OIPENINGS FOR THE PASSAGE OF HYDROGEN CHLORIDE GAS UPWARDLY INTO SAID ABSORPTION ZONE.
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |