GB1341497A - Process for the production of urea - Google Patents
Process for the production of ureaInfo
- Publication number
- GB1341497A GB1341497A GB2597771*A GB2597771A GB1341497A GB 1341497 A GB1341497 A GB 1341497A GB 2597771 A GB2597771 A GB 2597771A GB 1341497 A GB1341497 A GB 1341497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- decomposer
- reactor
- urea
- ammonia
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
1341497 Urea SNAM PROGETTI SpA 19 April 1971 [2 April 1970] 25977/71 Heading C2C A process for producing urea comprises: feeding carbon dioxide and ammonia to a synthesis reactor maintained at an elevated pressure and temperature, the ammonia being in excess with respect to the stoichiometricallyrequired value; reacting the carbon dioxide and ammonia in the reactor to produce urea contaminated with ammonium carbamate; conveying the liquid stream coming from the reactor and comprising urea, water, ammonium carbamate and ammonia to an ammonium carbamate decomposer operating at the same or substantially the same pressure as that in the reactor and at an elevated temperature; subjecting the ammonium carbamate to decomposition in the decomposer, by means of a countercurrent gaseous stream; removing from the lower region of the decomposer a liquid stream consisting essentially of urea, water and dissolved ammonia; subjecting a gaseous stream coming from the upper region of the decomposer and comprising NH 3 , CO 2 and water to condensation in a condenser operating at a pressure which is the same or substantially the same as the pressure in the reactor and at an elevated temperature ; recycling the condensed decomposition products from the condenser to the reactor; and introducing into the bottom of the decomposer, into the condenser or into the gaseous stream at any point between the decomposer and the condenser, at least one of oxygen, a gaseous mixture containing oxygen and a substance which is capable under the operating conditions of developing oxygen, as a corrosion inhibitor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2280470 | 1970-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1341497A true GB1341497A (en) | 1973-12-19 |
Family
ID=11200606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2597771*A Expired GB1341497A (en) | 1970-04-02 | 1971-04-19 | Process for the production of urea |
Country Status (24)
| Country | Link |
|---|---|
| JP (1) | JPS5529066B1 (en) |
| AT (1) | AT317910B (en) |
| BE (1) | BE765031A (en) |
| BR (1) | BR7101989D0 (en) |
| CH (1) | CH551386A (en) |
| CS (1) | CS182213B2 (en) |
| DE (1) | DE2116267C3 (en) |
| DK (1) | DK139815B (en) |
| EG (1) | EG10651A (en) |
| ES (1) | ES390189A1 (en) |
| FR (1) | FR2092554A5 (en) |
| GB (1) | GB1341497A (en) |
| HU (1) | HU164316B (en) |
| IE (1) | IE35308B1 (en) |
| IL (1) | IL36465A (en) |
| LU (1) | LU62905A1 (en) |
| NL (1) | NL171703C (en) |
| NO (1) | NO140055C (en) |
| RO (1) | RO63099A (en) |
| SE (1) | SE403370B (en) |
| TR (1) | TR16951A (en) |
| YU (1) | YU35755B (en) |
| ZA (1) | ZA712018B (en) |
| ZM (1) | ZM4671A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4758311A (en) * | 1982-06-03 | 1988-07-19 | Montedison S.P.A. | Method for avoiding the corrosion of the strippers in the urea manufacturing plants |
| US4899813A (en) * | 1984-04-20 | 1990-02-13 | Snamprogetti S.P.A. | Process and apparatus for the synthesis of urea and material used in it |
| US5176800A (en) * | 1989-12-29 | 1993-01-05 | Ammonia Casale S.A. | Process for the modernization of existing urea plants and a modernized urea plant |
| WO2008141832A1 (en) * | 2007-05-22 | 2008-11-27 | Saipem S.P.A. | Enhanced process for the synthesis of urea |
| RU2617407C2 (en) * | 2012-01-09 | 2017-04-25 | САИПЕМ С.п.А. | Method of urea synthesis, including organization of passivating stream at bottom of stripping column |
| US9890114B2 (en) | 2013-05-28 | 2018-02-13 | Toyo Engineering Corporation | Urea synthesis method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE787832A (en) * | 1971-09-02 | 1973-02-22 | Stamicarbon | PROCESS FOR THE PREPARATION OF UREA |
| JPS5811432B2 (en) * | 1979-10-08 | 1983-03-02 | 三井東圧化学株式会社 | Urea synthesis method |
| JPS57128669A (en) * | 1981-02-03 | 1982-08-10 | Toyo Eng Corp | Improvement of urea preparation process |
-
1971
- 1971-03-22 EG EG123/71A patent/EG10651A/en active
- 1971-03-22 IL IL36465A patent/IL36465A/en unknown
- 1971-03-29 IE IE396/71A patent/IE35308B1/en unknown
- 1971-03-29 ZA ZA712018A patent/ZA712018B/en unknown
- 1971-03-30 CS CS7100002290A patent/CS182213B2/en unknown
- 1971-03-30 TR TR16951A patent/TR16951A/en unknown
- 1971-03-31 FR FR7111263A patent/FR2092554A5/fr not_active Expired
- 1971-03-31 ES ES390189A patent/ES390189A1/en not_active Expired
- 1971-03-31 BE BE765031A patent/BE765031A/en not_active IP Right Cessation
- 1971-03-31 HU HUSA2184A patent/HU164316B/hu unknown
- 1971-04-01 DK DK156971AA patent/DK139815B/en not_active IP Right Cessation
- 1971-04-01 JP JP1927171A patent/JPS5529066B1/ja active Pending
- 1971-04-01 YU YU813/71A patent/YU35755B/en unknown
- 1971-04-01 LU LU62905D patent/LU62905A1/xx unknown
- 1971-04-01 NO NO1244/71A patent/NO140055C/en unknown
- 1971-04-02 BR BR1989/71A patent/BR7101989D0/en unknown
- 1971-04-02 DE DE2116267A patent/DE2116267C3/en not_active Expired
- 1971-04-02 AT AT284671A patent/AT317910B/en not_active IP Right Cessation
- 1971-04-02 NL NLAANVRAGE7104428,A patent/NL171703C/en not_active IP Right Cessation
- 1971-04-02 SE SE7104354A patent/SE403370B/en unknown
- 1971-04-02 CH CH487271A patent/CH551386A/en not_active IP Right Cessation
- 1971-04-02 ZM ZM46/71A patent/ZM4671A1/en unknown
- 1971-04-02 RO RO7100066459A patent/RO63099A/en unknown
- 1971-04-19 GB GB2597771*A patent/GB1341497A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4758311A (en) * | 1982-06-03 | 1988-07-19 | Montedison S.P.A. | Method for avoiding the corrosion of the strippers in the urea manufacturing plants |
| US4899813A (en) * | 1984-04-20 | 1990-02-13 | Snamprogetti S.P.A. | Process and apparatus for the synthesis of urea and material used in it |
| US5176800A (en) * | 1989-12-29 | 1993-01-05 | Ammonia Casale S.A. | Process for the modernization of existing urea plants and a modernized urea plant |
| WO2008141832A1 (en) * | 2007-05-22 | 2008-11-27 | Saipem S.P.A. | Enhanced process for the synthesis of urea |
| US8106241B2 (en) | 2007-05-22 | 2012-01-31 | Saipem S.P.A. | Enhanced process for the synthesis of urea |
| RU2468002C2 (en) * | 2007-05-22 | 2012-11-27 | САЙПЕМ С.п.А. | Improved urea synthesis method |
| AU2008253238B2 (en) * | 2007-05-22 | 2013-05-16 | Saipem S.P.A | Enhanced process for the synthesis of urea |
| CN101679224B (en) * | 2007-05-22 | 2013-11-06 | 塞彭公司 | Enhanced process for the synthesis of urea |
| RU2617407C2 (en) * | 2012-01-09 | 2017-04-25 | САИПЕМ С.п.А. | Method of urea synthesis, including organization of passivating stream at bottom of stripping column |
| US9890114B2 (en) | 2013-05-28 | 2018-02-13 | Toyo Engineering Corporation | Urea synthesis method |
Also Published As
| Publication number | Publication date |
|---|---|
| IE35308B1 (en) | 1976-01-07 |
| DK139815C (en) | 1979-10-01 |
| DE2116267A1 (en) | 1971-10-14 |
| NL171703B (en) | 1982-12-01 |
| FR2092554A5 (en) | 1972-01-21 |
| EG10651A (en) | 1977-10-31 |
| YU35755B (en) | 1981-06-30 |
| NO140055C (en) | 1980-10-29 |
| JPS5529066B1 (en) | 1980-07-31 |
| HU164316B (en) | 1974-01-28 |
| DE2116267C3 (en) | 1980-04-24 |
| IE35308L (en) | 1971-10-02 |
| AT317910B (en) | 1974-09-25 |
| RO63099A (en) | 1978-09-15 |
| BE765031A (en) | 1971-08-16 |
| ZM4671A1 (en) | 1971-12-22 |
| SE403370B (en) | 1978-08-14 |
| YU81371A (en) | 1980-10-31 |
| BR7101989D0 (en) | 1973-02-22 |
| DK139815B (en) | 1979-04-23 |
| NL171703C (en) | 1985-02-18 |
| NL7104428A (en) | 1971-10-05 |
| ZA712018B (en) | 1971-12-29 |
| TR16951A (en) | 1974-01-09 |
| LU62905A1 (en) | 1971-08-26 |
| CH551386A (en) | 1974-07-15 |
| NO140055B (en) | 1979-03-19 |
| CS182213B2 (en) | 1978-04-28 |
| IL36465A0 (en) | 1971-05-26 |
| ES390189A1 (en) | 1973-07-01 |
| IL36465A (en) | 1974-07-31 |
| DE2116267B2 (en) | 1974-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1365707A (en) | Process for preparing urea | |
| YU284782A (en) | Process for the manufacture of melamine by means of catalytic conversion of carbamide in the presence of gaseous nh3 or an nh3containing gaseous mixture | |
| GB1470489A (en) | Process for producing urea | |
| GB1341497A (en) | Process for the production of urea | |
| GB1106024A (en) | Urea synthesis | |
| GB1259976A (en) | Urea synthesis process | |
| GB1447914A (en) | Process for preparing urea from ammonia and carbon dioxide | |
| GB1453422A (en) | Synthesis of urea | |
| GB1348937A (en) | Processing of coke oven gas | |
| GB1248519A (en) | Improved process for the manufacture of adiponitrile | |
| GB1479900A (en) | Process for the separation and recovery of ammonia and acid gases | |
| GB1184004A (en) | Process for the Production of Urea having a Low Carbamate Content | |
| ES443998A1 (en) | Treatment of water vapor generated in concentrating an aqueous urea solution | |
| GB1147734A (en) | Method for the preparation of urea | |
| GB1099371A (en) | Process for the production of urea by synthesis from ammonia and carbon dioxide | |
| GB981641A (en) | Production of urea | |
| GB1253724A (en) | Process for producing urea | |
| ES309851A1 (en) | Urea synthesis method. (Machine-translation by Google Translate, not legally binding) | |
| GB987500A (en) | Process for the production of urea | |
| GB1272873A (en) | Process for the production of urea | |
| GB1292515A (en) | Process for producing urea | |
| GB1327321A (en) | Process for urea synthesis | |
| GB1423977A (en) | Urea synthesis with heat recovery and ammonium carbamate recirculation | |
| GB1181039A (en) | Process for the Production of Urea | |
| GB983812A (en) | Improvements relating to the production of urea |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| 414A | Case decided by the comptroller ** specification amended (sect. 14/1949) | ||
| PS | Patent sealed [section 19, patents act 1949] | ||
| PE20 | Patent expired after termination of 20 years |