GB1012819A - Process for separating melamine from hot, melamine-containing gas mixtures - Google Patents
Process for separating melamine from hot, melamine-containing gas mixturesInfo
- Publication number
- GB1012819A GB1012819A GB918163A GB918163A GB1012819A GB 1012819 A GB1012819 A GB 1012819A GB 918163 A GB918163 A GB 918163A GB 918163 A GB918163 A GB 918163A GB 1012819 A GB1012819 A GB 1012819A
- Authority
- GB
- United Kingdom
- Prior art keywords
- melamine
- ammonia
- gas mixture
- hot
- water
- 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
- 229920000877 Melamine resin Polymers 0.000 title abstract 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 title abstract 6
- 239000000203 mixture Substances 0.000 title abstract 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 10
- 229910021529 ammonia Inorganic materials 0.000 abstract 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 2
- 239000001569 carbon dioxide Substances 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- 239000004202 carbamide Substances 0.000 abstract 1
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 239000002826 coolant Substances 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
- C07D251/40—Nitrogen atoms
- C07D251/54—Three nitrogen atoms
- C07D251/56—Preparation of melamine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treating Waste Gases (AREA)
Abstract
Melamine is recovered from a hot gas mixture containing also ammonia and carbon dioxide (e.g. obtained in the catalytic reaction of ammonia with urea or a thermol decomposition product thereof at 300-450 DEG C.) by contacting the hot gas with a substantially constant volume of water in a cooling zone, the water becoming saturated with ammonia and carbon dioxide, discharging melamine from the cooling zone, separately discharging the remaining gas, containing at least 90% of the ammonia originally present; and making up water lost by evaporation or entrainment. The gas mixture may be cooled in two stages, first cocurrent with the coolant and then countercurrent. Ammonia separated from the gas mixture after recovery of melamine may be recycled to the melamine production zone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL275724 | 1962-03-08 | ||
| NL286072 | 1962-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1012819A true GB1012819A (en) | 1965-12-08 |
Family
ID=26641824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB918163A Expired GB1012819A (en) | 1962-03-08 | 1963-03-07 | Process for separating melamine from hot, melamine-containing gas mixtures |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE629244A (en) |
| CH (1) | CH451175A (en) |
| DE (1) | DE1204236B (en) |
| ES (1) | ES285797A1 (en) |
| GB (1) | GB1012819A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1215165B (en) * | 1964-01-16 | 1966-04-28 | Lentia Gmbh | Method and device for the direct production of pure melamine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2918467A (en) * | 1959-12-22 | Production of melamine |
-
1963
- 1963-03-04 DE DE1963ST020370 patent/DE1204236B/en active Pending
- 1963-03-05 CH CH278563A patent/CH451175A/en unknown
- 1963-03-06 BE BE629244A patent/BE629244A/en unknown
- 1963-03-07 ES ES285797A patent/ES285797A1/en not_active Expired
- 1963-03-07 GB GB918163A patent/GB1012819A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1204236B (en) | 1965-11-04 |
| BE629244A (en) | 1963-10-21 |
| CH451175A (en) | 1968-05-15 |
| ES285797A1 (en) | 1963-08-01 |
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