DE1618926B1 - Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt - Google Patents
Verfahren zur Herstellung von Harnstoff mit niedrigem BiuretgehaltInfo
- Publication number
- DE1618926B1 DE1618926B1 DE1967S0110929 DES0110929A DE1618926B1 DE 1618926 B1 DE1618926 B1 DE 1618926B1 DE 1967S0110929 DE1967S0110929 DE 1967S0110929 DE S0110929 A DES0110929 A DE S0110929A DE 1618926 B1 DE1618926 B1 DE 1618926B1
- Authority
- DE
- Germany
- Prior art keywords
- urea
- biuret
- ammonium carbamate
- production
- mother liquors
- 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.)
- Withdrawn
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims description 31
- 239000004202 carbamide Substances 0.000 title claims description 31
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 30
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 claims description 16
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 16
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 2
- 238000011282 treatment Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 12
- 238000003786 synthesis reaction Methods 0.000 description 11
- 238000002425 crystallisation Methods 0.000 description 9
- 230000008025 crystallization Effects 0.000 description 9
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 6
- 239000012452 mother liquor Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 231100000674 Phytotoxicity Toxicity 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012527 feed solution Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 230000002485 urinary effect Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
-
- 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
-
- 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
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
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 |
|---|---|---|---|
| IT2073366 | 1966-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1618926B1 true DE1618926B1 (de) | 1971-01-28 |
Family
ID=11171223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1967S0110929 Withdrawn DE1618926B1 (de) | 1966-07-27 | 1967-07-21 | Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt |
Country Status (12)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006059760A1 (de) * | 2006-12-18 | 2008-06-19 | Skw Stickstoffwerke Piesteritz Gmbh | Verfahren zur kontinuierlichen Herstellung von hochreiner Harnstofflösung |
| EP3199518A4 (en) * | 2014-09-22 | 2018-03-28 | Toyo Engineering Corporation | Process for producing high-purity aqueous urea solution in urea production process |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52139164U (enrdf_load_stackoverflow) * | 1976-04-13 | 1977-10-21 | ||
| JPS52163463U (enrdf_load_stackoverflow) * | 1976-06-02 | 1977-12-10 | ||
| JPS6114665U (ja) * | 1984-07-02 | 1986-01-28 | 和也 生駒 | 容器 |
| ITMI20120013A1 (it) | 2012-01-09 | 2013-07-10 | Saipem Spa | Procedimento per la sintesi di urea comprendente un flusso di passivazione a fondo stripper |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3232984A (en) * | 1961-11-20 | 1966-02-01 | Pullman Inc | Low biuret urea |
| US3255246A (en) * | 1963-06-27 | 1966-06-07 | Du Pont | Synthesis and recovery of urea |
| US3318951A (en) * | 1963-04-11 | 1967-05-09 | Stamicarbon | Preparation of urea with a low biuret content |
-
1967
- 1967-07-10 GR GR670133978A patent/GR33978B/el unknown
- 1967-07-20 BE BE701633D patent/BE701633A/xx not_active IP Right Cessation
- 1967-07-21 DE DE1967S0110929 patent/DE1618926B1/de not_active Withdrawn
- 1967-07-22 ES ES343801A patent/ES343801A1/es not_active Expired
- 1967-07-24 CS CS5415A patent/CS163163B2/cs unknown
- 1967-07-24 JP JP42047285A patent/JPS5127659B1/ja active Pending
- 1967-07-25 LU LU54171D patent/LU54171A1/xx unknown
- 1967-07-25 CH CH1060067A patent/CH471089A/fr not_active IP Right Cessation
- 1967-07-26 SE SE6710879*A patent/SE387334B/xx unknown
- 1967-07-26 BR BR191527/67A patent/BR6791527D0/pt unknown
- 1967-07-27 YU YU1507/67A patent/YU33783B/xx unknown
- 1967-07-27 NL NL676710422A patent/NL145849B/xx not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3232984A (en) * | 1961-11-20 | 1966-02-01 | Pullman Inc | Low biuret urea |
| US3318951A (en) * | 1963-04-11 | 1967-05-09 | Stamicarbon | Preparation of urea with a low biuret content |
| US3255246A (en) * | 1963-06-27 | 1966-06-07 | Du Pont | Synthesis and recovery of urea |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006059760A1 (de) * | 2006-12-18 | 2008-06-19 | Skw Stickstoffwerke Piesteritz Gmbh | Verfahren zur kontinuierlichen Herstellung von hochreiner Harnstofflösung |
| DE102006059760B4 (de) * | 2006-12-18 | 2009-04-02 | Skw Stickstoffwerke Piesteritz Gmbh | Verfahren zur kontinuierlichen Herstellung von hochreiner Harnstofflösung |
| EP3199518A4 (en) * | 2014-09-22 | 2018-03-28 | Toyo Engineering Corporation | Process for producing high-purity aqueous urea solution in urea production process |
| US10173972B2 (en) | 2014-09-22 | 2019-01-08 | Toyo Engineering Corporation | Method for producing high-purity aqueous urea solution in urea production process |
Also Published As
| Publication number | Publication date |
|---|---|
| YU33783B (en) | 1978-05-15 |
| CS163163B2 (enrdf_load_stackoverflow) | 1975-08-29 |
| ES343801A1 (es) | 1968-09-16 |
| BR6791527D0 (pt) | 1973-06-28 |
| NL145849B (nl) | 1975-05-15 |
| JPS5127659B1 (enrdf_load_stackoverflow) | 1976-08-13 |
| NL6710422A (enrdf_load_stackoverflow) | 1968-01-29 |
| LU54171A1 (enrdf_load_stackoverflow) | 1967-09-25 |
| GR33978B (el) | 1968-02-29 |
| BE701633A (enrdf_load_stackoverflow) | 1968-01-02 |
| SE387334B (sv) | 1976-09-06 |
| CH471089A (fr) | 1969-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1246696B (de) | Verfahren zur Herstellung von Ammoniumbicarbonat aus einem ammoniakhaltigen Gas, insbesondere aus Koksofengas | |
| DE1767442B2 (de) | Kontinuierliches verfahren zum reinigen einer rohphosphorsaeureaufschlussloesung | |
| DE1618926B1 (de) | Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt | |
| DE2603652C3 (de) | Kontinuierliches Verfahren zur gleichzeitigen Herstellung von konzentrierter Phosphorsäure oder von Phosphaten und eines granulierten NPK-Düngemittels | |
| DE2521507B2 (de) | Verfahren zur rueckgewinnung der harnstoff-, ammoniak- und kohlendioxidanteile aus dem beim einengen einer harnstoffloesung anfallenden dampfgemisch | |
| DE1618926C (de) | Verfahren zur Herstellung von Harn stoff mit niedrigem Biuretgehalt | |
| DE1263727B (de) | Verfahren zur Gewinnung von Natriumbicarbonat | |
| DE1542611B2 (de) | Kontinuierliches Verfahren zur Herstellung von Phosphorsäure und Calciumsulfatdihydrat | |
| DE1618852C3 (de) | Verfahren zur Herstellung von Harnstoff | |
| DE397602C (de) | Verfahren zur Umwandlung von Cyanamid in Harnstoff | |
| DE1288590B (de) | Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt | |
| DE1925038C3 (de) | Verfahren zur Gewinnung von Terephthalsäure | |
| AT229876B (de) | Verfahren zur Herstellung von sehr reinem Melamin | |
| CH634827A5 (en) | Process for the preparation of nitroguanidine from guanidine nitrate by dehydration | |
| AT314474B (de) | Verfahren zur Herstellung von Aluminiumfluorid und Kryolith | |
| DE3137356C2 (de) | Verfahren zur Herstellung von konzentrierter Ameisensäure | |
| DE1620337A1 (de) | Verfahren zur Neutralisation von sauren Caprolaktamloesungen | |
| AT244345B (de) | Verfahren und Vorrichtung zur Gewinnung von reinem Melamin | |
| AT276418B (de) | Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt | |
| DE908134C (de) | Verfahren zur Erzeugung von Alkaliferrocyanid | |
| DE2742975A1 (de) | Verfahren zur herstellung von cyanursaeure | |
| DE1567956A1 (de) | Kontinuierliche Herstellung von wasserfreiem Natriumsulfit | |
| DE2016668A1 (de) | Kreisverfahren zur Herstellung von Weinsäure | |
| AT219051B (de) | Verfahren zur Verminderung bzw. Beseitigung des Biuretgehaltes von Harnstoff | |
| DE1167847B (de) | Verfahren zur Herstellung von reinem Melamin aus Harnstoff |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 | ||
| 8339 | Ceased/non-payment of the annual fee |