JPS5928550B2 - メラミン合成の反応廃ガスの冷却法 - Google Patents
メラミン合成の反応廃ガスの冷却法Info
- Publication number
- JPS5928550B2 JPS5928550B2 JP51067210A JP6721076A JPS5928550B2 JP S5928550 B2 JPS5928550 B2 JP S5928550B2 JP 51067210 A JP51067210 A JP 51067210A JP 6721076 A JP6721076 A JP 6721076A JP S5928550 B2 JPS5928550 B2 JP S5928550B2
- Authority
- JP
- Japan
- Prior art keywords
- melt
- urea
- temperature
- cooling
- waste 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
- 238000006243 chemical reaction Methods 0.000 title claims description 20
- 238000001816 cooling Methods 0.000 title claims description 20
- 229920000877 Melamine resin Polymers 0.000 title claims description 18
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 title claims description 18
- 239000002912 waste gas Substances 0.000 title claims description 17
- 230000015572 biosynthetic process Effects 0.000 title claims description 13
- 238000003786 synthesis reaction Methods 0.000 title claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 44
- 239000004202 carbamide Substances 0.000 claims description 44
- 239000000155 melt Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 5
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 4
- 230000008014 freezing Effects 0.000 description 8
- 238000007710 freezing Methods 0.000 description 8
- 239000012495 reaction gas Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000374 eutectic mixture Substances 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 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
- C07D251/60—Preparation of melamine from urea or from carbon dioxide and ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Treating Waste Gases (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752525781 DE2525781C3 (de) | 1975-06-10 | 1975-06-10 | Verfahren zum Abscheiden von Melamin aus den Abgasen der Melaminsynthese |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5228463A JPS5228463A (en) | 1977-03-03 |
| JPS5928550B2 true JPS5928550B2 (ja) | 1984-07-13 |
Family
ID=5948716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51067210A Expired JPS5928550B2 (ja) | 1975-06-10 | 1976-06-10 | メラミン合成の反応廃ガスの冷却法 |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5928550B2 (OSRAM) |
| BE (1) | BE842727A (OSRAM) |
| DE (1) | DE2525781C3 (OSRAM) |
| ES (1) | ES448687A1 (OSRAM) |
| FR (1) | FR2314182A1 (OSRAM) |
| GB (1) | GB1549212A (OSRAM) |
| NL (1) | NL184680C (OSRAM) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3808200A1 (de) * | 1988-03-11 | 1989-09-21 | Wacker Chemie Gmbh | Bei raumtemperatur zu anstrichvertraeglichen bis ueberstreichbaren elastomeren vernetzende organopolysiloxanmassen |
| FR2640987B1 (OSRAM) * | 1988-12-22 | 1992-06-05 | Rhone Poulenc Chimie | |
| JPH0341176A (ja) * | 1989-07-10 | 1991-02-21 | Bridgestone Corp | 樹脂複合ゴム管状物と口金具との接着方法 |
| DE102009052506B4 (de) | 2009-11-11 | 2015-08-20 | Air Liquide Global E&C Solutions Germany Gmbh | Gaswäscher mit integriertem Wärmetauscher |
| CN114452897A (zh) * | 2022-01-06 | 2022-05-10 | 四川金象赛瑞化工股份有限公司 | 一种尿素加料装置、加料方法及三聚氰胺生产装置和方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1429640A (fr) * | 1964-03-28 | 1966-02-25 | Basf Ag | Procédé pour récupérer l'urée des gaz résiduaires provenant de la synthèse de la mélamine à partir d'urée, en phase gazeuse, et débarrassés de la mélamine |
-
1975
- 1975-06-10 DE DE19752525781 patent/DE2525781C3/de not_active Expired
-
1976
- 1976-06-08 NL NL7606169A patent/NL184680C/xx not_active IP Right Cessation
- 1976-06-09 ES ES448687A patent/ES448687A1/es not_active Expired
- 1976-06-09 FR FR7617342A patent/FR2314182A1/fr active Granted
- 1976-06-09 GB GB2382176A patent/GB1549212A/en not_active Expired
- 1976-06-09 BE BE167735A patent/BE842727A/xx not_active IP Right Cessation
- 1976-06-10 JP JP51067210A patent/JPS5928550B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL184680C (nl) | 1989-10-02 |
| BE842727A (fr) | 1976-12-09 |
| JPS5228463A (en) | 1977-03-03 |
| FR2314182B1 (OSRAM) | 1980-07-25 |
| DE2525781B2 (de) | 1979-10-31 |
| GB1549212A (en) | 1979-08-01 |
| FR2314182A1 (fr) | 1977-01-07 |
| ES448687A1 (es) | 1977-07-01 |
| NL7606169A (nl) | 1976-12-14 |
| DE2525781C3 (de) | 1980-07-17 |
| DE2525781A1 (de) | 1976-12-16 |
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