CH617672A5 - Process for reducing the biuret content in urea - Google Patents
Process for reducing the biuret content in urea Download PDFInfo
- Publication number
- CH617672A5 CH617672A5 CH674574A CH674574A CH617672A5 CH 617672 A5 CH617672 A5 CH 617672A5 CH 674574 A CH674574 A CH 674574A CH 674574 A CH674574 A CH 674574A CH 617672 A5 CH617672 A5 CH 617672A5
- Authority
- CH
- Switzerland
- Prior art keywords
- urea
- biuret
- resin
- solution
- ion exchange
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims description 110
- 239000004202 carbamide Substances 0.000 title claims description 109
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 42
- 239000011347 resin Substances 0.000 claims description 37
- 229920005989 resin Polymers 0.000 claims description 37
- 239000003456 ion exchange resin Substances 0.000 claims description 22
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 22
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005342 ion exchange Methods 0.000 claims description 9
- 125000000129 anionic group Chemical group 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 50
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 229910001868 water Inorganic materials 0.000 description 19
- 235000011121 sodium hydroxide Nutrition 0.000 description 17
- 239000007788 liquid Substances 0.000 description 14
- 230000008929 regeneration Effects 0.000 description 13
- 238000011069 regeneration method Methods 0.000 description 13
- 229910021529 ammonia Inorganic materials 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 239000000047 product Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000012467 final product Substances 0.000 description 7
- 238000011001 backwashing Methods 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 101150036080 at gene Proteins 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 230000000885 phytotoxic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 150000003672 ureas Chemical class 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
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2327273A GB1404098A (en) | 1973-05-16 | 1973-05-16 | Process for reducing the biuret content in urea |
| IT2416173A IT987491B (it) | 1973-05-16 | 1973-05-16 | Procedimento per ridurre il con tenuto di biureto nella urea |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH617672A5 true CH617672A5 (en) | 1980-06-13 |
Family
ID=26256424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH674574A CH617672A5 (en) | 1973-05-16 | 1974-05-16 | Process for reducing the biuret content in urea |
Country Status (18)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7753985B2 (en) | 2004-02-05 | 2010-07-13 | Uhde Gmbh | Reduction of biuret and free ammonia during a method for producing fertilizer granulates containing urea |
| WO2021004713A1 (de) | 2019-07-10 | 2021-01-14 | Thyssenkrupp Industrial Solutions Ag | Reduzierung der biuretgeneration in der harnstoffproduktion |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4345099A (en) * | 1981-08-10 | 1982-08-17 | Union Oil Company Of California | Method of selectively removing biuret from urea and compositions for use therein |
| RO131559A2 (ro) * | 2011-11-23 | 2016-12-30 | Farid Alekovich Batullin | Metodă pentru obţinerea carbamidei cristaline cu puritate ridicată |
| CN115738359B (zh) * | 2022-10-20 | 2025-09-16 | 江苏可兰素环保科技有限公司 | 一种尿素颗粒的萃取提纯工艺 |
-
1973
- 1973-05-16 GB GB2327273A patent/GB1404098A/en not_active Expired
-
1974
- 1974-05-13 AR AR253709A patent/AR213610A1/es active
- 1974-05-15 BR BR3961/74A patent/BR7403961D0/pt unknown
- 1974-05-15 EG EG175/74A patent/EG11437A/xx active
- 1974-05-16 SE SE7406519A patent/SE420196B/xx not_active IP Right Cessation
- 1974-05-16 CH CH674574A patent/CH617672A5/it not_active IP Right Cessation
- 1974-05-16 ZA ZA00743136A patent/ZA743136B/xx unknown
- 1974-05-16 DD DD178556A patent/DD113897A5/xx unknown
- 1974-05-16 IN IN1069/CAL/1974A patent/IN142126B/en unknown
- 1974-05-16 BE BE144365A patent/BE815096A/xx not_active IP Right Cessation
- 1974-05-16 AT AT406174A patent/AT344723B/de not_active IP Right Cessation
- 1974-05-16 FR FR7417058A patent/FR2229690B1/fr not_active Expired
- 1974-05-16 CS CS743519A patent/CS203001B2/cs unknown
- 1974-05-16 CA CA200,114A patent/CA1019344A/en not_active Expired
- 1974-05-16 SU SU742026956A patent/SU953978A3/ru active
- 1974-05-16 NL NL7406618A patent/NL7406618A/xx active Search and Examination
- 1974-05-16 BG BG026705A patent/BG21603A3/xx unknown
- 1974-05-16 LU LU70102A patent/LU70102A1/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7753985B2 (en) | 2004-02-05 | 2010-07-13 | Uhde Gmbh | Reduction of biuret and free ammonia during a method for producing fertilizer granulates containing urea |
| WO2021004713A1 (de) | 2019-07-10 | 2021-01-14 | Thyssenkrupp Industrial Solutions Ag | Reduzierung der biuretgeneration in der harnstoffproduktion |
Also Published As
| Publication number | Publication date |
|---|---|
| LU70102A1 (enrdf_load_stackoverflow) | 1976-04-13 |
| BR7403961D0 (pt) | 1974-12-24 |
| CA1019344A (en) | 1977-10-18 |
| AR213610A1 (es) | 1979-02-28 |
| AT344723B (de) | 1978-08-10 |
| FR2229690B1 (enrdf_load_stackoverflow) | 1976-12-24 |
| DE2423890B2 (de) | 1976-04-15 |
| FR2229690A1 (enrdf_load_stackoverflow) | 1974-12-13 |
| CS203001B2 (en) | 1981-02-27 |
| BG21603A3 (bg) | 1976-07-20 |
| DD113897A5 (enrdf_load_stackoverflow) | 1975-07-05 |
| SE420196B (sv) | 1981-09-21 |
| IN142126B (enrdf_load_stackoverflow) | 1977-06-04 |
| DE2423890A1 (de) | 1974-12-12 |
| GB1404098A (en) | 1975-08-28 |
| SU953978A3 (ru) | 1982-08-23 |
| ATA406174A (de) | 1977-12-15 |
| EG11437A (en) | 1977-08-15 |
| BE815096A (fr) | 1974-11-18 |
| AU6904674A (en) | 1975-11-20 |
| NL7406618A (enrdf_load_stackoverflow) | 1974-11-19 |
| ZA743136B (en) | 1975-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2385043B1 (en) | Low-energy-consumption process for the production of high-purity melamine, through the pyrolysis of urea and relative equipment | |
| JP5767217B2 (ja) | ガス流からアンモニアを回収するための方法および装置 | |
| CH617672A5 (en) | Process for reducing the biuret content in urea | |
| CN109422409B (zh) | 含铵盐废水的处理方法 | |
| JPH05337477A (ja) | アンモニウム塩含有溶液の湿式酸化反応 | |
| CN106276816B (zh) | 离子膜烧碱副产稀硫酸的真空脱氯提纯方法及其专用装置 | |
| CN108726756B (zh) | 含铵盐废水的处理方法 | |
| KR870001143B1 (ko) | 요소의 제조방법 | |
| CN109422400B (zh) | 催化剂生产废水的处理方法 | |
| CN104903236A (zh) | 生产硫酸铵晶体的方法和装置 | |
| CN109422407B (zh) | 催化剂生产废水的处理方法 | |
| JP4696333B2 (ja) | ホウ素の回収方法 | |
| CN108726611B (zh) | 一种催化剂生产废水的处理方法 | |
| CN109422396B (zh) | 催化剂生产废水的处理方法 | |
| WO2001096288A1 (en) | Process for decomposing a carbamate aqueous solution coming from the urea recovery section of a urea production plant | |
| CN108726610B (zh) | 含铵盐废水的处理方法 | |
| CN109422395B (zh) | 催化剂生产废水的处理方法 | |
| IL44844A (en) | Process for reducing the biuret content in urea | |
| CN108726606B (zh) | 一种催化剂生产废水的处理方法 | |
| US3172887A (en) | Purification of melamine | |
| CN108726758B (zh) | 一种催化剂生产废水的处理方法 | |
| CN108726603B (zh) | 一种催化剂生产废水的处理方法 | |
| CN108726608B (zh) | 一种催化剂生产废水的处理方法 | |
| CN108726766B (zh) | 一种催化剂生产废水的处理方法 | |
| CN108726607B (zh) | 一种催化剂生产废水的处理方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |