IE35007B1 - Process for the production of urea - Google Patents
Process for the production of ureaInfo
- Publication number
- IE35007B1 IE35007B1 IE1337/70A IE133770A IE35007B1 IE 35007 B1 IE35007 B1 IE 35007B1 IE 1337/70 A IE1337/70 A IE 1337/70A IE 133770 A IE133770 A IE 133770A IE 35007 B1 IE35007 B1 IE 35007B1
- Authority
- IE
- Ireland
- Prior art keywords
- urea
- aqueous solution
- reactor
- stripper
- gaseous products
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title abstract 7
- 239000004202 carbamide Substances 0.000 title abstract 7
- 239000007864 aqueous solution Substances 0.000 abstract 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 4
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 abstract 3
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 abstract 3
- 239000011261 inert gas Substances 0.000 abstract 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 2
- 239000007789 gas Substances 0.000 abstract 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 238000002317 scanning near-field acoustic microscopy Methods 0.000 abstract 1
- 238000005979 thermal decomposition reaction 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
- C07C273/04—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)
- Fertilizers (AREA)
Abstract
1,272,873. Urea. SNAM PROGETTI S.p.A. 16 Oct., 1970 [16 Oct., 1969], No. 49366/70. Heading C2C. An aqueous solution of urea is prepared by reacting ammonia and carbon dioxide in a reactor so as to produce an aqueous solution of urea contaminated with ammonium carbamate, passing the contaminated aqueous solution to a decomposer and decomposing therein the majority of the ammonium carbamate into gaseous products, separating the majority of the gaseous products from the aqueous solution of urea and stripping at an elevated temperature in a stripper the aqueous solution of urea from which the majority of the gaseous products have been separated with, as a stripping agent, an inert gas, so as to obtain an aqueous solution of urea, and wherein the separated gaseous products are condensed and the resulting condensate is recycled to the reactor and wherein the stream containing the inert gas and stripped gases, emerging from the stripper, is subjected to condensation, and the condensate of stripped gases is recycled to the reactor and the inert gas (which is not condensed) is washed, compressed and recycled to the stripper. The decomposition of the ammonium carbamate may be either a thermal decomposition or be carried out by means of a countercurrent stream of heated gaseous ammonia. The reactor is suitably operated at a temperature of 150 to 300 C. and pressure of 50 to 300 atmospheres, the pressures in the reactor, decomposer and stripper being preferably the same.
[GB1272873A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2344069 | 1969-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE35007L IE35007L (en) | 1971-04-16 |
| IE35007B1 true IE35007B1 (en) | 1975-10-15 |
Family
ID=11207092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE1337/70A IE35007B1 (en) | 1969-10-16 | 1970-10-16 | Process for the production of urea |
Country Status (22)
| Country | Link |
|---|---|
| JP (1) | JPS514971B1 (en) |
| AT (1) | AT317909B (en) |
| BE (1) | BE757274A (en) |
| CH (1) | CH527170A (en) |
| CS (2) | CS157687B2 (en) |
| DE (2) | DE2050903C3 (en) |
| DK (1) | DK135987B (en) |
| ES (1) | ES385234A1 (en) |
| FR (1) | FR2065166A5 (en) |
| GB (1) | GB1272873A (en) |
| HU (2) | HU165606B (en) |
| IE (1) | IE35007B1 (en) |
| LU (1) | LU61859A1 (en) |
| NL (1) | NL7015201A (en) |
| NO (1) | NO149545C (en) |
| PH (1) | PH9964A (en) |
| PL (1) | PL81118B1 (en) |
| RO (1) | RO56794A (en) |
| SE (2) | SE373837B (en) |
| YU (1) | YU35114B (en) |
| ZA (1) | ZA706778B (en) |
| ZM (1) | ZM11270A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE446978B (en) * | 1977-05-05 | 1986-10-20 | Montedison Spa | ISOBARIC DOUBLE CIRCULATOR PROCEDURE FOR SYNTHETIZATION OF UREA DURING INTERMEDIATE PRODUCTION OF AMMONIUM CARBAMATE |
| JPS5517346A (en) * | 1978-07-24 | 1980-02-06 | Toyo Eng Corp | Synthetic method of urea |
| IT1141030B (en) * | 1980-08-29 | 1986-10-01 | Snam Progetti | PROCEDURE FOR THE PRODUCTION OF UREA |
| JPS61109760A (en) * | 1984-11-02 | 1986-05-28 | Toyo Eng Corp | Urea production method |
-
0
- BE BE757274D patent/BE757274A/en not_active IP Right Cessation
-
1970
- 1970-09-29 PL PL1970143534A patent/PL81118B1/pl unknown
- 1970-10-06 ZA ZA706778A patent/ZA706778B/en unknown
- 1970-10-07 YU YU2472/70A patent/YU35114B/en unknown
- 1970-10-08 FR FR7036330A patent/FR2065166A5/fr not_active Expired
- 1970-10-09 CS CS683870A patent/CS157687B2/cs unknown
- 1970-10-09 CS CS104073*1A patent/CS157688B2/cs unknown
- 1970-10-12 SE SE7013781A patent/SE373837B/xx unknown
- 1970-10-12 CH CH1504370A patent/CH527170A/en not_active IP Right Cessation
- 1970-10-13 ZM ZM112/70A patent/ZM11270A1/en unknown
- 1970-10-13 LU LU61859D patent/LU61859A1/xx unknown
- 1970-10-14 NO NO3878/70A patent/NO149545C/en unknown
- 1970-10-15 HU HUSA2138A patent/HU165606B/hu unknown
- 1970-10-15 ES ES385234A patent/ES385234A1/en not_active Expired
- 1970-10-15 DK DK524270AA patent/DK135987B/en unknown
- 1970-10-15 HU HUSA2518A patent/HU166923B/hu unknown
- 1970-10-16 JP JP45090612A patent/JPS514971B1/ja active Pending
- 1970-10-16 PH PH11874A patent/PH9964A/en unknown
- 1970-10-16 DE DE2050903A patent/DE2050903C3/en not_active Expired
- 1970-10-16 AT AT935970A patent/AT317909B/en not_active IP Right Cessation
- 1970-10-16 NL NL7015201A patent/NL7015201A/xx unknown
- 1970-10-16 DE DE2065278*A patent/DE2065278C3/en not_active Expired
- 1970-10-16 IE IE1337/70A patent/IE35007B1/en unknown
- 1970-10-16 GB GB49366A patent/GB1272873A/en not_active Expired
- 1970-10-16 RO RO64717A patent/RO56794A/ro unknown
-
1973
- 1973-05-25 SE SE7307459A patent/SE401825B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2065278B2 (en) | 1974-03-07 |
| GB1272873A (en) | 1972-05-03 |
| DE2050903A1 (en) | 1971-04-29 |
| YU247270A (en) | 1980-03-15 |
| CH527170A (en) | 1972-08-31 |
| DE2065278A1 (en) | 1973-01-18 |
| ES385234A1 (en) | 1973-09-01 |
| DE2050903C3 (en) | 1974-01-10 |
| YU35114B (en) | 1980-09-25 |
| SE373837B (en) | 1975-02-17 |
| AT317909B (en) | 1974-09-25 |
| HU165606B (en) | 1974-09-28 |
| LU61859A1 (en) | 1971-05-04 |
| CS157688B2 (en) | 1974-09-16 |
| NO149545B (en) | 1984-01-30 |
| DE2050903B2 (en) | 1973-06-07 |
| IE35007L (en) | 1971-04-16 |
| ZM11270A1 (en) | 1971-06-22 |
| NL7015201A (en) | 1971-04-20 |
| PH9964A (en) | 1976-06-16 |
| DK135987C (en) | 1977-12-27 |
| ZA706778B (en) | 1971-07-28 |
| SE401825B (en) | 1978-05-29 |
| CS157687B2 (en) | 1974-09-16 |
| BE757274A (en) | 1971-03-16 |
| NO149545C (en) | 1984-05-09 |
| RO56794A (en) | 1974-07-01 |
| PL81118B1 (en) | 1975-08-30 |
| HU166923B (en) | 1975-06-28 |
| FR2065166A5 (en) | 1971-07-23 |
| DK135987B (en) | 1977-07-25 |
| JPS514971B1 (en) | 1976-02-16 |
| DE2065278C3 (en) | 1974-10-17 |
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