IT1134939B - High yield urea synthesis - Google Patents
High yield urea synthesisInfo
- Publication number
- IT1134939B IT1134939B IT19006/81A IT1900681A IT1134939B IT 1134939 B IT1134939 B IT 1134939B IT 19006/81 A IT19006/81 A IT 19006/81A IT 1900681 A IT1900681 A IT 1900681A IT 1134939 B IT1134939 B IT 1134939B
- Authority
- IT
- Italy
- Prior art keywords
- soln
- urea
- unreacted
- under
- separate
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title abstract 10
- 239000004202 carbamide Substances 0.000 title abstract 10
- 230000015572 biosynthetic process Effects 0.000 title abstract 3
- 238000003786 synthesis reaction Methods 0.000 title abstract 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 22
- 229910000069 nitrogen hydride Inorganic materials 0.000 abstract 10
- 239000011261 inert gas Substances 0.000 abstract 4
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 abstract 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Synthesis of urea comprises (a) reacting CO2 with excess NH3 at 170-220 deg.C under 100-300 kg/sq.cmG to produce urea soln. contg. unreacted CO2 and NH3; (b) sepg. inert gas from the urea soln. under pressure nearly same as the urea synthesis pressure together with a small quantity of unreacted CO2 and NH3; (c) stripping the urea soln. at 150-230 deg.C under 90-310 kg/sq.cmG by using CO2 or NH3 to separate a part of unreacted CO2 and NH3 contained in the soln.; (d) distilling the urea soln. under 10-25 kg/sq.cmG to separate most of unreacted CO2 and NH3 contained in the soln.; (e) distilling the urea soln. under low pressure to separate all of unreacted CO2 and NH3; (f) obtaining urea from thus obtd. urea aq. soln.; (g) contacting the sepd. inert gas and CO2 and NH3 from the high pressure distn. process with absorbing medium to produce high pressure absorption soln.; (h) cooling NH3 and the inert gas not absorbed to separate liq. ammonia from the inert gas; (i) contacting the absorption soln. with CO2 and NH3 from the stripping process to produce ammonia carbamate soln.;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT19006/81A IT1134939B (en) | 1981-01-05 | 1981-01-05 | High yield urea synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT19006/81A IT1134939B (en) | 1981-01-05 | 1981-01-05 | High yield urea synthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT8119006A0 IT8119006A0 (en) | 1981-01-05 |
| IT1134939B true IT1134939B (en) | 1986-08-20 |
Family
ID=11153784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT19006/81A IT1134939B (en) | 1981-01-05 | 1981-01-05 | High yield urea synthesis |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1134939B (en) |
-
1981
- 1981-01-05 IT IT19006/81A patent/IT1134939B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT8119006A0 (en) | 1981-01-05 |
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