JPS6129943B2 - - Google Patents
Info
- Publication number
- JPS6129943B2 JPS6129943B2 JP52092147A JP9214777A JPS6129943B2 JP S6129943 B2 JPS6129943 B2 JP S6129943B2 JP 52092147 A JP52092147 A JP 52092147A JP 9214777 A JP9214777 A JP 9214777A JP S6129943 B2 JPS6129943 B2 JP S6129943B2
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- ammonium carbamate
- carbon dioxide
- urea
- gas
- 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
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 139
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 115
- 239000004202 carbamide Substances 0.000 claims description 88
- 239000007789 gas Substances 0.000 claims description 77
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 73
- 229910021529 ammonia Inorganic materials 0.000 claims description 63
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 claims description 49
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000000354 decomposition reaction Methods 0.000 claims description 42
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 37
- 239000001569 carbon dioxide Substances 0.000 claims description 31
- 238000003786 synthesis reaction Methods 0.000 claims description 28
- 238000000926 separation method Methods 0.000 claims description 25
- 230000015572 biosynthetic process Effects 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 21
- 239000007791 liquid phase Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011874 heated mixture Substances 0.000 claims description 5
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- 239000003546 flue gas Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 24
- 239000012530 fluid Substances 0.000 description 23
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 17
- 239000012071 phase Substances 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 5
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000004657 carbamic acid derivatives Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/710,318 US4088684A (en) | 1976-07-30 | 1976-07-30 | Urea reactor effluent solution recycle in urea synthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5318516A JPS5318516A (en) | 1978-02-20 |
| JPS6129943B2 true JPS6129943B2 (US07122603-20061017-C00045.png) | 1986-07-10 |
Family
ID=24853530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9214777A Granted JPS5318516A (en) | 1976-07-30 | 1977-07-30 | Urea sinthesizing process |
Country Status (14)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0364831U (US07122603-20061017-C00045.png) * | 1989-10-30 | 1991-06-25 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867661A (ja) * | 1981-10-16 | 1983-04-22 | Mitsui Toatsu Chem Inc | 尿素合成法 |
| US5316554A (en) * | 1992-06-03 | 1994-05-31 | Hansen Charles N | Method for processing crystalline ammonium carbamate |
| WO2001096287A1 (en) * | 2000-06-15 | 2001-12-20 | Urea Casale S.A. | Process and plant for the production of urea |
| US9863725B1 (en) | 2012-02-29 | 2018-01-09 | The United States Of America As Represented By The Secretary Of The Air Force | Systems and methods for thermal management through use of ammonium carbamate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1423412A (fr) * | 1964-09-08 | 1966-01-03 | Snam Spa | Procédé pour la fabrication de l'urée par synthèse à partir de l'ammoniac et de l'anhydride carbonique, comportant un recyclage total de la partie non transformée en urée |
| US3579636A (en) * | 1968-05-16 | 1971-05-18 | Ivo Mavrovic | Urea synthesis process |
| US3573173A (en) * | 1968-07-24 | 1971-03-30 | Mitsui Toatsu Chemicals | Process for recovering excess ammonia in urea synthesis by direct contact condensation with liquid ammonia |
| US3759992A (en) * | 1970-06-29 | 1973-09-18 | I Mavrovic | Urea synthesis |
| US3808271A (en) * | 1970-06-29 | 1974-04-30 | I Mavrovic | Urea synthesis |
| US3886210A (en) * | 1970-06-29 | 1975-05-27 | Ivo Mavrovic | Urea synthesis with improved heat recovery and ammonium carbamate recirculation |
-
1976
- 1976-07-30 US US05/710,318 patent/US4088684A/en not_active Expired - Lifetime
-
1977
- 1977-07-15 CA CA282,884A patent/CA1075263A/en not_active Expired
- 1977-07-21 PT PT66838A patent/PT66838B/pt unknown
- 1977-07-25 FR FR7722803A patent/FR2359818A1/fr active Granted
- 1977-07-25 BE BE179613A patent/BE857126A/xx unknown
- 1977-07-26 BR BR7704887A patent/BR7704887A/pt unknown
- 1977-07-27 NL NL7708348A patent/NL7708348A/xx not_active Application Discontinuation
- 1977-07-27 GB GB31448/77A patent/GB1526678A/en not_active Expired
- 1977-07-27 DE DE19772733887 patent/DE2733887A1/de active Pending
- 1977-07-27 AR AR268584A patent/AR213444A1/es active
- 1977-07-27 ES ES461061A patent/ES461061A1/es not_active Expired
- 1977-07-29 IT IT26353/77A patent/IT1085659B/it active
- 1977-07-30 JP JP9214777A patent/JPS5318516A/ja active Granted
- 1977-07-30 EG EG450/77A patent/EG12892A/xx active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0364831U (US07122603-20061017-C00045.png) * | 1989-10-30 | 1991-06-25 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2359818A1 (fr) | 1978-02-24 |
| BE857126A (fr) | 1978-01-25 |
| PT66838B (en) | 1978-12-27 |
| JPS5318516A (en) | 1978-02-20 |
| EG12892A (en) | 1980-03-31 |
| FR2359818B3 (US07122603-20061017-C00045.png) | 1980-08-08 |
| NL7708348A (nl) | 1978-02-01 |
| GB1526678A (en) | 1978-09-27 |
| CA1075263A (en) | 1980-04-08 |
| AR213444A1 (es) | 1979-01-31 |
| ES461061A1 (es) | 1978-06-01 |
| DE2733887A1 (de) | 1978-02-09 |
| IT1085659B (it) | 1985-05-28 |
| BR7704887A (pt) | 1978-04-04 |
| US4088684A (en) | 1978-05-09 |
| PT66838A (en) | 1977-08-01 |
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