US2926070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decomposition of ammonium sulfate
Assignee: Houdry Process Corp
•
Filing: 1954-02-23
•
Granted: 1960-02-23
•
Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas H Milliken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:55
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/745; C01C; C01C1/00; C01C1/02; C01C1/026; C01C1/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN THE METHOD OF PREPARING AMMONIA AND SULFURIC ACID BY DECOMPOSITION OF AT LEAST ONE SALT FROM THE GROUP CONSISTING OF AMMONIUM SULFATE AND ACID AMMONIUM SULFATE BY CONTACTING SAID SALT WITTH A CONTACT MATERIAL COMPRISING ZINC OXIDE AT 500-1000*F. TO GENERATE AMMONIA GAS AND TO FORM ZINC SULFATE IN THE CONTACT MATERIAL, HEATING THE THUS FORMED CONTACT MATERIAL TO THERMALLY DECOMPOSE THE ZILNC SULFATE TO GENERATE OXIDES OF SULFUR, AND RECYCLING THE RESULTING ZINC OXIDE CONTAINING CONTACT MATERIAL TO CONTACT ADDITIONAL AMOUNTS OF SAID SALT, THE IMPROVEMENT WHICH COMPRISES: EMPLOYING SULFUR DIOXIDE GAS AS A HEAT-TRANSFER GAS, HEATING SAID SULFUR DIOXIDE GAS TO A TEMPERATURE ABOVE ABOUT 1350*, PASSING SAID PREHEATED SULFUR DIOXIDE INTO THE
Claim 2
Dependent Claim
116 words
IN THE METHOD OF PREPARING AMMONIA AND SULFURIC ACID BY DECOMPOSITION OF AT LEAST ONE SALT FROM THE GROUP CONSISTING OF AMMONIUM SULFATE AND ACID AMMONIUM SULFATE BY CONTACTING SAID SALT WITTH A CONTACT MATERIAL COMPRISING ZINC OXIDE AT 500-1000*F. TO GENERATE AMMONIA GAS AND TO FORM ZINC SULFATE IN THE CONTACT MATERIAL, HEATING THE THUS FORMED CONTACT MATERIAL TO THERMALLY DECOMPOSE THE ZILNC SULFATE TO GENERATE OXIDES OF SULFUR, AND RECYCLING THE RESULTING ZINC OXIDE CONTAINING CONTACT MATERIAL TO CONTACT ADDITIONAL AMOUNTS OF SAID SALT, THE IMPROVEMENT WHICH COMPRISES: EMPLOYING SULFUR DIOXIDE GAS AS A HEAT-TRANSFER GAS, HEATING SAID SULFUR DIOXIDE GAS TO A TEMPERATURE ABOVE ABOUT 1350*, PASSING SAID PREHEATED SULFUR DIOXIDE INTO THE
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) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |