Process and plant for ammonia-urea production
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United States of America Patent
Stats
-
Jul 18, 2017
Issued Date -
N/A
app pub date -
Feb 10, 2012
filing date -
Mar 24, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A process for ammonia-urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia-urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia-urea plants.
First Claim
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International Classification(s)
- 2012 Application Filing Year
- C01C Class
- 36 Applications Filed
- 32 Patents Issued To-Date
- 88.89 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C01C Class
- 0 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 18, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 18, 2029 |
