US3038285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for compressing urea synthesis off-gas
Assignee: Chemical Construction Corp
•
Filing: 1960-03-18
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Granted: 1962-06-12
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Expires: 1980-03-18
Abstract
No abstract record available.
Inventors
- 👤 Mavrovic Ivo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:11
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/02; C07C273/04; C01; C01C; C01C1/00; C01C1/02; C01C1/12; Y; Y02; Y02P; Y02P20/00; Y02P20/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
METHOD OF COMPRESSING A UREA SYNTHESIS OFF-GAS STREAM CONTAINING AMMONIA, CARBON DIOXIDE AND WATER VAPOR TO ELEVATED PRESSURE WHICH COMPRISES ASPIRATING SAID OFF-GAS INTO A HIGH PRESSURE AQUEOUS LIQUID SOLUTION WHEREBY THE PRESSURE OF SAID LIQUID SOLUTION IS REDUCED AND A MIXED GAS-LIQUID STREAM IS FORMED AT ELEVATED PRESSURE, DIVIDING THE MIXED STREAM OF GAS AND LIQUID AT ELEVATED PRESSURE INTO SEPARATE GAS AND LIQUID PHASES, REMOVING SAID GAS PHASE AT ELEVATED PRESSURE AS COMPRESSED OFF-GAS, PUMPING SAID LIQUID PHASE TO HIGH PRESSURE, AND RECYCLING SAID LIQUID PHASE TO SAID ASPIRATION STEP AS SAID HIGH PRESSURE AQUEOUS LIQUID SOLUTION.
Claim 2
Dependent Claim
99 words
METHOD OF COMPRESSING A UREA SYNTHESIS OFF-GAS STREAM CONTAINING AMMONIA, CARBON DIOXIDE AND WATER VAPOR TO ELEVATED PRESSURE WHICH COMPRISES ASPIRATING SAID OFF-GAS INTO A HIGH PRESSURE AQUEOUS LIQUID SOLUTION WHEREBY THE PRESSURE OF SAID LIQUID SOLUTION IS REDUCED AND A MIXED GAS-LIQUID STREAM IS FORMED AT ELEVATED PRESSURE, DIVIDING THE MIXED STREAM OF GAS AND LIQUID AT ELEVATED PRESSURE INTO SEPARATE GAS AND LIQUID PHASES, REMOVING SAID GAS PHASE AT ELEVATED PRESSURE AS COMPRESSED OFF-GAS, PUMPING SAID LIQUID PHASE TO HIGH PRESSURE, AND RECYCLING SAID LIQUID PHASE TO SAID ASPIRATION STEP AS SAID HIGH PRESSURE AQUEOUS LIQUID SOLUTION.
References Cited (Backward Citations)
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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) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |