IE38973L - Purification of urea solution - Google Patents
Purification of urea solutionInfo
- Publication number
- IE38973L IE38973L IE740465A IE46574A IE38973L IE 38973 L IE38973 L IE 38973L IE 740465 A IE740465 A IE 740465A IE 46574 A IE46574 A IE 46574A IE 38973 L IE38973 L IE 38973L
- Authority
- IE
- Ireland
- Prior art keywords
- aqueous solution
- urea
- purification
- urea solution
- vessel
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title abstract 4
- 239000004202 carbamide Substances 0.000 title abstract 4
- 238000000746 purification Methods 0.000 title 1
- 239000007864 aqueous solution Substances 0.000 abstract 5
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 abstract 2
- 239000007792 gaseous phase Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 1
- 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
- 238000010438 heat treatment Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A process for reducing the concentration of ammonia and ammonium carbamate in an impure aqueous solution of urea, which process comprises passing the impure aqueous solution downwardly through a vessel and heating at least a portion of the aqueous solution of urea so as to produce a gaseous phase which passes upwardly through the vessel in countercurrent to the aqueous solution, die contact time between the aqueous solution of urea and the gaseous phase being less than 60 seconds. [IN139208]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21300/73A IT981191B (en) | 1973-03-08 | 1973-03-08 | PROCEDURE FOR PURIFICATION FROM NH 3 AND CARBAMATE OF THE SOLUTION OUT OF A SINTE SI REACTOR OF THE URE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE38973L true IE38973L (en) | 1974-09-08 |
| IE38973B1 IE38973B1 (en) | 1978-07-05 |
Family
ID=11179741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE00465/74A IE38973B1 (en) | 1973-03-08 | 1974-03-05 | Purification of a solution of urea |
Country Status (25)
| Country | Link |
|---|---|
| JP (2) | JPS49124029A (en) |
| AR (1) | AR200429A1 (en) |
| AT (1) | AT342067B (en) |
| BE (1) | BE811880A (en) |
| BR (1) | BR7401582D0 (en) |
| CA (1) | CA1022103A (en) |
| CH (1) | CH603565A5 (en) |
| DD (1) | DD112752A5 (en) |
| DK (1) | DK144008C (en) |
| EG (1) | EG11031A (en) |
| ES (1) | ES424334A1 (en) |
| FR (1) | FR2220516B1 (en) |
| GB (1) | GB1402249A (en) |
| IE (1) | IE38973B1 (en) |
| IN (1) | IN139208B (en) |
| IT (1) | IT981191B (en) |
| LU (1) | LU69576A1 (en) |
| MW (1) | MW874A1 (en) |
| NL (1) | NL7403054A (en) |
| PH (1) | PH12740A (en) |
| RO (1) | RO69510A (en) |
| SE (1) | SE386145B (en) |
| TR (1) | TR17998A (en) |
| ZA (1) | ZA741186B (en) |
| ZM (1) | ZM4274A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2955916A (en) * | 1955-11-21 | 1960-10-11 | Lonza Electric & Chem Works | Method of producing carbon dioxide and ammonia from intermediate reaction products in the synthesis of urea |
| FR1534669A (en) * | 1964-02-17 | 1968-08-02 | Allied Chem | Process and device for the decomposition of ammonium carbamate, in particular resulting from the synthesis of urea, as well as the products obtained by the present process or similar process |
-
1973
- 1973-03-08 IT IT21300/73A patent/IT981191B/en active
-
1974
- 1974-02-22 ZA ZA00741186A patent/ZA741186B/en unknown
- 1974-02-26 TR TR17998A patent/TR17998A/en unknown
- 1974-02-26 EG EG61/74A patent/EG11031A/en active
- 1974-02-28 FR FR7406822A patent/FR2220516B1/fr not_active Expired
- 1974-02-28 MW MW8/74*UA patent/MW874A1/en unknown
- 1974-03-04 BR BR1582/74A patent/BR7401582D0/en unknown
- 1974-03-04 AR AR252612A patent/AR200429A1/en active
- 1974-03-05 JP JP49024872A patent/JPS49124029A/ja active Pending
- 1974-03-05 BE BE141648A patent/BE811880A/en not_active IP Right Cessation
- 1974-03-05 IE IE00465/74A patent/IE38973B1/en unknown
- 1974-03-05 RO RO7477908A patent/RO69510A/en unknown
- 1974-03-06 GB GB1015374A patent/GB1402249A/en not_active Expired
- 1974-03-06 NL NL7403054A patent/NL7403054A/xx not_active Application Discontinuation
- 1974-03-06 CH CH317174A patent/CH603565A5/xx not_active IP Right Cessation
- 1974-03-06 DD DD176982A patent/DD112752A5/xx unknown
- 1974-03-06 ZM ZM42/74A patent/ZM4274A1/en unknown
- 1974-03-06 SE SE7402993A patent/SE386145B/en not_active IP Right Cessation
- 1974-03-07 LU LU69576A patent/LU69576A1/xx unknown
- 1974-03-07 CA CA194,352A patent/CA1022103A/en not_active Expired
- 1974-03-07 ES ES424334A patent/ES424334A1/en not_active Expired
- 1974-03-07 DK DK125174A patent/DK144008C/en not_active IP Right Cessation
- 1974-03-07 AT AT189874A patent/AT342067B/en not_active IP Right Cessation
- 1974-03-08 PH PH15599A patent/PH12740A/en unknown
- 1974-03-19 IN IN592/CAL/74A patent/IN139208B/en unknown
-
1981
- 1981-03-06 JP JP1981030423U patent/JPS56134344U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ES424334A1 (en) | 1976-06-01 |
| CH603565A5 (en) | 1978-08-31 |
| IE38973B1 (en) | 1978-07-05 |
| DD112752A5 (en) | 1975-05-05 |
| AU6594074A (en) | 1975-08-28 |
| GB1402249A (en) | 1975-08-06 |
| CA1022103A (en) | 1977-12-06 |
| BR7401582D0 (en) | 1974-11-05 |
| DK144008B (en) | 1981-11-16 |
| ZA741186B (en) | 1975-01-29 |
| JPS56134344U (en) | 1981-10-12 |
| LU69576A1 (en) | 1974-07-05 |
| BE811880A (en) | 1974-07-01 |
| DK144008C (en) | 1982-04-26 |
| DE2411205A1 (en) | 1974-09-26 |
| RO69510A (en) | 1980-12-30 |
| FR2220516A1 (en) | 1974-10-04 |
| FR2220516B1 (en) | 1978-01-06 |
| MW874A1 (en) | 1975-05-13 |
| NL7403054A (en) | 1974-09-10 |
| TR17998A (en) | 1976-08-20 |
| IN139208B (en) | 1976-05-22 |
| SE386145B (en) | 1976-08-02 |
| IT981191B (en) | 1974-10-10 |
| EG11031A (en) | 1976-11-30 |
| DE2411205B2 (en) | 1976-01-15 |
| ZM4274A1 (en) | 1974-11-21 |
| PH12740A (en) | 1979-08-09 |
| ATA189874A (en) | 1977-07-15 |
| AT342067B (en) | 1978-03-10 |
| AR200429A1 (en) | 1974-11-08 |
| JPS49124029A (en) | 1974-11-27 |
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