RO84765B - Procedeu pentru prepararea unei solutii concentrate de uree - Google Patents
Procedeu pentru prepararea unei solutii concentrate de ureeInfo
- Publication number
- RO84765B RO84765B RO106866A RO10686682A RO84765B RO 84765 B RO84765 B RO 84765B RO 106866 A RO106866 A RO 106866A RO 10686682 A RO10686682 A RO 10686682A RO 84765 B RO84765 B RO 84765B
- Authority
- RO
- Romania
- Prior art keywords
- pressure
- stage
- urea
- pressure stage
- high pressure
- Prior art date
Links
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
- C07C273/04—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 from carbon dioxide and ammonia
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C275/00—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C275/02—Salts; Complexes; Addition compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Catalysts (AREA)
- Electroluminescent Light Sources (AREA)
- Steroid Compounds (AREA)
- Compounds Of Unknown Constitution (AREA)
- Saccharide Compounds (AREA)
Abstract
Inventia se refera la un procedeu pentru prepararea unei solutii concentrate de uree, prin: a) reactia dintre amoniac si bioxid de carbon într-o faza de lucru la presiune înalta, într-o zona de reactie la presiune ridicata si temperatura ridicata, pentru a forma un prim curent de produs de uree continînd carbamat de amoniu si amoniac liber; b) descompunerea carbamatului de amoniu existent în primul curent de produs de uree în tr-o faza de descompunere la presiune înalta, la o presiune efeciv egala cu presiunea din zona de sinteza si eliminarea amoniacului si bioxidului de carbon format aici prin alimentarea cu caldura si striparea cu bioxid de carbon, pentru a forma un al doilea curent de produs de uree avînd un continut redus de carbamat de amoniu si bioxid de coarbon format aici si recircularea condensatului în zona de reactie; c) descompunerea cantitatilor suplimentare de carbamat de amniu prezen în cel de-al doilea curent de produs uree în una sau mau multe faze de lucru suplimentare la presiune joasa, separarea si condensarea amestecului gazos continînd amoniac si bioxid de carbon si recircularea condensatului la fazele de lucru la presiune ridicata; d) concentrarea solutiei apoase de uree ce rezulta din treapta c) si eliminarea si condensarea amestecului gazos de vapori de apa, amoniac si biocix de carbon, formînd condensatul de proces; e) tratarea condensatului de proces într-o traota de desorbtie pentru recuperarea amoniacului si bioidului de catrbon din acesta, procedeu ce consa în aceea ca presiunea celui de-al doilea curent de produs de uree este redusa cu ajutorul unui ejector, în care energia eliberata este utilizata pentru a
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8101174A NL8101174A (nl) | 1981-03-11 | 1981-03-11 | Werkwijze voor de bereiding van ureum. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RO84765A RO84765A (ro) | 1984-08-17 |
| RO84765B true RO84765B (ro) | 1984-09-30 |
Family
ID=19837140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO106866A RO84765B (ro) | 1981-03-11 | 1982-03-10 | Procedeu pentru prepararea unei solutii concentrate de uree |
Country Status (22)
| Country | Link |
|---|---|
| EP (1) | EP0060511B1 (ro) |
| JP (1) | JPS57159756A (ro) |
| KR (1) | KR830009010A (ro) |
| AT (1) | ATE7905T1 (ro) |
| AU (1) | AU8125082A (ro) |
| BR (1) | BR8201298A (ro) |
| CS (1) | CS227344B2 (ro) |
| DD (1) | DD202535A5 (ro) |
| DE (1) | DE3260234D1 (ro) |
| ES (1) | ES8303302A1 (ro) |
| FI (1) | FI820829L (ro) |
| IL (1) | IL65220A0 (ro) |
| MA (1) | MA19404A1 (ro) |
| NL (1) | NL8101174A (ro) |
| NO (1) | NO820778L (ro) |
| OA (1) | OA07039A (ro) |
| PL (1) | PL235399A1 (ro) |
| PT (1) | PT74566B (ro) |
| RO (1) | RO84765B (ro) |
| YU (1) | YU48182A (ro) |
| ZA (1) | ZA821595B (ro) |
| ZW (1) | ZW4482A1 (ro) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1491526A1 (en) * | 2003-06-27 | 2004-12-29 | Urea Casale S.A. | Process and plant for urea production |
| EP3736415A1 (en) * | 2019-05-10 | 2020-11-11 | Yara International ASA | Steam network assembly for a plant comprising an ammonia-producing unit and a urea-producing unit |
| CN113416154B (zh) * | 2021-07-30 | 2023-01-17 | 新疆心连心能源化工有限公司 | 尿素合成未反应物循环回收方法及装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3406201A (en) * | 1965-06-18 | 1968-10-15 | Exxon Research Engineering Co | Urea synthesis |
| YU34282B (en) * | 1967-12-14 | 1979-04-30 | Snam Progetti | Process for the decomposition and recyclation of unreacted ammonium carbamate into the reactor for the synthesis of carbamide |
| AT284138B (de) * | 1968-02-06 | 1970-09-10 | Snam Progetti | Verfahren zur Herstellung von Harnstoff |
| NL165712C (nl) * | 1970-05-30 | 1981-05-15 | Stamicarbon | Werkwijze en inrichting voor het bij synthesedruk terug- winnen van ammoniak en kooldioxyde uit het spuigas van een ureumsynthese. |
| NL168506C (nl) * | 1970-12-31 | 1982-04-16 | Stamicarbon | Werkwijze voor de bereiding van ureum. |
| BE787832A (fr) * | 1971-09-02 | 1973-02-22 | Stamicarbon | Procede pour la preparation d'uree |
| NL7307036A (ro) * | 1973-05-21 | 1974-11-25 | ||
| NL7612162A (nl) * | 1976-11-03 | 1978-05-08 | Unie Van Kunstmestfab Bv | Werkwijze voor de bereiding van een ureum- oplossing uit nh3 en co2. |
-
1981
- 1981-03-11 NL NL8101174A patent/NL8101174A/nl not_active Application Discontinuation
-
1982
- 1982-03-05 MA MA19609A patent/MA19404A1/fr unknown
- 1982-03-05 YU YU00481/82A patent/YU48182A/xx unknown
- 1982-03-10 NO NO820778A patent/NO820778L/no unknown
- 1982-03-10 FI FI820829A patent/FI820829L/fi not_active Application Discontinuation
- 1982-03-10 IL IL65220A patent/IL65220A0/xx unknown
- 1982-03-10 BR BR8201298A patent/BR8201298A/pt unknown
- 1982-03-10 RO RO106866A patent/RO84765B/ro unknown
- 1982-03-10 ES ES510282A patent/ES8303302A1/es not_active Expired
- 1982-03-10 AU AU81250/82A patent/AU8125082A/en not_active Abandoned
- 1982-03-10 KR KR1019820001030A patent/KR830009010A/ko unknown
- 1982-03-10 ZW ZW44/82A patent/ZW4482A1/xx unknown
- 1982-03-10 ZA ZA821595A patent/ZA821595B/xx unknown
- 1982-03-11 DE DE8282101925T patent/DE3260234D1/de not_active Expired
- 1982-03-11 CS CS821668A patent/CS227344B2/cs unknown
- 1982-03-11 JP JP57037316A patent/JPS57159756A/ja active Pending
- 1982-03-11 PT PT74566A patent/PT74566B/pt unknown
- 1982-03-11 EP EP82101925A patent/EP0060511B1/en not_active Expired
- 1982-03-11 DD DD82238072A patent/DD202535A5/de unknown
- 1982-03-11 PL PL23539982A patent/PL235399A1/xx unknown
- 1982-03-11 AT AT82101925T patent/ATE7905T1/de not_active IP Right Cessation
- 1982-03-11 OA OA57634A patent/OA07039A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| OA07039A (fr) | 1983-12-31 |
| DD202535A5 (de) | 1983-09-21 |
| PT74566A (en) | 1982-04-01 |
| NO820778L (no) | 1982-09-13 |
| CS227344B2 (en) | 1984-04-16 |
| ES510282A0 (es) | 1983-02-01 |
| EP0060511A1 (en) | 1982-09-22 |
| ATE7905T1 (de) | 1984-06-15 |
| ZA821595B (en) | 1983-01-26 |
| PL235399A1 (ro) | 1982-10-11 |
| ES8303302A1 (es) | 1983-02-01 |
| PT74566B (en) | 1983-11-07 |
| IL65220A0 (en) | 1982-05-31 |
| DE3260234D1 (en) | 1984-07-19 |
| MA19404A1 (fr) | 1982-10-01 |
| JPS57159756A (en) | 1982-10-01 |
| YU48182A (en) | 1985-03-20 |
| FI820829L (fi) | 1982-09-12 |
| ZW4482A1 (en) | 1982-07-14 |
| RO84765A (ro) | 1984-08-17 |
| KR830009010A (ko) | 1983-12-17 |
| AU8125082A (en) | 1982-09-16 |
| NL8101174A (nl) | 1982-10-01 |
| EP0060511B1 (en) | 1984-06-13 |
| BR8201298A (pt) | 1983-01-25 |
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