NO124031B - - Google Patents
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- Publication number
- NO124031B NO124031B NO170124A NO17012467A NO124031B NO 124031 B NO124031 B NO 124031B NO 170124 A NO170124 A NO 170124A NO 17012467 A NO17012467 A NO 17012467A NO 124031 B NO124031 B NO 124031B
- Authority
- NO
- Norway
- Prior art keywords
- urea
- pressure
- ammonia
- absorbate
- carbon dioxide
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 194
- 239000004202 carbamide Substances 0.000 claims description 194
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 189
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 138
- 238000004821 distillation Methods 0.000 claims description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 82
- 238000003786 synthesis reaction Methods 0.000 claims description 80
- 229910021529 ammonia Inorganic materials 0.000 claims description 78
- 230000015572 biosynthetic process Effects 0.000 claims description 77
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 69
- 239000001569 carbon dioxide Substances 0.000 claims description 69
- 239000000203 mixture Substances 0.000 claims description 52
- 238000010521 absorption reaction Methods 0.000 claims description 41
- 230000002745 absorbent Effects 0.000 claims description 39
- 239000002250 absorbent Substances 0.000 claims description 39
- 239000012452 mother liquor Substances 0.000 claims description 39
- 239000007864 aqueous solution Substances 0.000 claims description 27
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 20
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 19
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 239000013078 crystal Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 12
- 150000002500 ions Chemical class 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 description 38
- 239000008246 gaseous mixture Substances 0.000 description 26
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 7
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- GPWDPLKISXZVIE-UHFFFAOYSA-N cyclo[18]carbon Chemical compound C1#CC#CC#CC#CC#CC#CC#CC#CC#C1 GPWDPLKISXZVIE-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-IGMARMGPSA-N Carbon-12 Chemical compound [12C] OKTJSMMVPCPJKN-IGMARMGPSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/12—Separation of ammonia from gases and vapours
-
- 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)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Gas Separation By Absorption (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6722366 | 1966-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO124031B true NO124031B (de) | 1972-02-21 |
Family
ID=13338682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO170124A NO124031B (de) | 1966-10-14 | 1967-10-13 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3506710A (de) |
| DE (1) | DE1668733A1 (de) |
| GB (1) | GB1148991A (de) |
| NL (1) | NL6713948A (de) |
| NO (1) | NO124031B (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3668250A (en) * | 1969-08-19 | 1972-06-06 | Chemical Construction Corp | Urea synthesis process |
| US3759992A (en) * | 1970-06-29 | 1973-09-18 | I Mavrovic | Urea synthesis |
| JPS555977B2 (de) * | 1974-05-14 | 1980-02-12 | ||
| IT1014987B (it) * | 1974-06-12 | 1977-04-30 | Snam Progetti | Procedimento integrato urea am moniaca |
| JPS5268129A (en) * | 1975-12-05 | 1977-06-06 | Mitsui Toatsu Chem Inc | Recovery of unreacted material and heat on urea synthesis |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2694728A (en) * | 1952-07-11 | 1954-11-16 | American Cyanamid Co | Method of preparing urea |
| DE1248639B (de) * | 1959-07-03 | |||
| US3155723A (en) * | 1960-02-04 | 1964-11-03 | Chemical Construction Corp | Synthesis of urea and recovery of residual reactants |
| US3258486A (en) * | 1961-01-23 | 1966-06-28 | Chemical Construction Corp | Process for urea synthesis |
| US3281464A (en) * | 1961-09-08 | 1966-10-25 | Lummus Co | Urea purification with recovery of ammonia and carbon dioxide |
| US3200148A (en) * | 1962-08-29 | 1965-08-10 | Chemical Construction Corp | Urea synthesis process |
| NL302169A (de) * | 1962-12-24 | 1900-01-01 | ||
| US3305582A (en) * | 1963-09-11 | 1967-02-21 | Chemical Construction Corp | Urea synthesis with recovery of excess ammonia |
-
1967
- 1967-10-10 GB GB46215/67A patent/GB1148991A/en not_active Expired
- 1967-10-10 US US674211A patent/US3506710A/en not_active Expired - Lifetime
- 1967-10-11 DE DE19671668733 patent/DE1668733A1/de active Pending
- 1967-10-13 NO NO170124A patent/NO124031B/no unknown
- 1967-10-13 NL NL6713948A patent/NL6713948A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL6713948A (de) | 1968-04-16 |
| GB1148991A (en) | 1969-04-16 |
| DE1668733A1 (de) | 1972-03-16 |
| US3506710A (en) | 1970-04-14 |
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