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
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 |
---|---|---|---|
IT2416173A IT987491B (it) | 1973-05-16 | 1973-05-16 | Procedimento per ridurre il con tenuto di biureto nella urea |
GB2327273A GB1404098A (en) | 1973-05-16 | 1973-05-16 | Process for reducing the biuret content in 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)
Country | Link |
---|---|
AR (1) | AR213610A1 (no) |
AT (1) | AT344723B (no) |
BE (1) | BE815096A (no) |
BG (1) | BG21603A3 (no) |
BR (1) | BR7403961D0 (no) |
CA (1) | CA1019344A (no) |
CH (1) | CH617672A5 (no) |
CS (1) | CS203001B2 (no) |
DD (1) | DD113897A5 (no) |
EG (1) | EG11437A (no) |
FR (1) | FR2229690B1 (no) |
GB (1) | GB1404098A (no) |
IN (1) | IN142126B (no) |
LU (1) | LU70102A1 (no) |
NL (1) | NL7406618A (no) |
SE (1) | SE420196B (no) |
SU (1) | SU953978A3 (no) |
ZA (1) | ZA743136B (no) |
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 (2)
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 |
RU2472777C1 (ru) * | 2011-11-23 | 2013-01-20 | Фарид Алекович Батуллин | Способ получения кристаллического карбамида высокой очистки |
-
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 FR FR7417058A patent/FR2229690B1/fr not_active Expired
- 1974-05-16 ZA ZA00743136A patent/ZA743136B/xx unknown
- 1974-05-16 IN IN1069/CAL/1974A patent/IN142126B/en unknown
- 1974-05-16 CA CA200,114A patent/CA1019344A/en not_active Expired
- 1974-05-16 BE BE144365A patent/BE815096A/xx not_active IP Right Cessation
- 1974-05-16 LU LU70102A patent/LU70102A1/xx unknown
- 1974-05-16 DD DD178556A patent/DD113897A5/xx unknown
- 1974-05-16 BG BG026705A patent/BG21603A3/xx unknown
- 1974-05-16 CH CH674574A patent/CH617672A5/it not_active IP Right Cessation
- 1974-05-16 NL NL7406618A patent/NL7406618A/xx active Search and Examination
- 1974-05-16 AT AT406174A patent/AT344723B/de not_active IP Right Cessation
- 1974-05-16 SU SU742026956A patent/SU953978A3/ru active
- 1974-05-16 CS CS743519A patent/CS203001B2/cs 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 |
---|---|
DE2423890B2 (de) | 1976-04-15 |
IN142126B (no) | 1977-06-04 |
AU6904674A (en) | 1975-11-20 |
NL7406618A (no) | 1974-11-19 |
FR2229690B1 (no) | 1976-12-24 |
SE420196B (sv) | 1981-09-21 |
CS203001B2 (en) | 1981-02-27 |
BG21603A3 (bg) | 1976-07-20 |
DD113897A5 (no) | 1975-07-05 |
SU953978A3 (ru) | 1982-08-23 |
FR2229690A1 (no) | 1974-12-13 |
ZA743136B (en) | 1975-08-27 |
BR7403961D0 (pt) | 1974-12-24 |
EG11437A (en) | 1977-08-15 |
GB1404098A (en) | 1975-08-28 |
CA1019344A (en) | 1977-10-18 |
BE815096A (fr) | 1974-11-18 |
DE2423890A1 (de) | 1974-12-12 |
ATA406174A (de) | 1977-12-15 |
AR213610A1 (es) | 1979-02-28 |
AT344723B (de) | 1978-08-10 |
LU70102A1 (no) | 1976-04-13 |
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Legal Events
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PL | Patent ceased |