GB943595A - Preparation of urea prills - Google Patents
Preparation of urea prillsInfo
- Publication number
- GB943595A GB943595A GB3782462A GB3782462A GB943595A GB 943595 A GB943595 A GB 943595A GB 3782462 A GB3782462 A GB 3782462A GB 3782462 A GB3782462 A GB 3782462A GB 943595 A GB943595 A GB 943595A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prills
- urea
- preparation
- crystals
- melt
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicinal Preparation (AREA)
- Fertilizers (AREA)
Abstract
Urea prills poor in biuret are prepared by heating urea crystals to produce a melt which still contains urea crystals, dividing said melt into drops containing such crystals and solidifying said drops into prills. The melting process may be carried out continuously and ammonia may be fed in to inhibit or retard biuret formation during the melting.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL270116 | 1961-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB943595A true GB943595A (en) | 1963-12-04 |
Family
ID=19753336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3782462A Expired GB943595A (en) | 1961-10-10 | 1962-10-05 | Preparation of urea prills |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH411834A (en) |
ES (1) | ES281394A1 (en) |
FI (1) | FI40097C (en) |
GB (1) | GB943595A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369885A (en) * | 1964-02-12 | 1968-02-20 | Toyo Koatsu Ind Inc | Process for prilled urea-potassium metaphosphate fertilizer |
WO2005049193A1 (en) * | 2003-11-10 | 2005-06-02 | Dsm Ip Assets B.V. | Process for the preparation of urea granules |
-
1962
- 1962-10-04 CH CH1167662A patent/CH411834A/en unknown
- 1962-10-05 GB GB3782462A patent/GB943595A/en not_active Expired
- 1962-10-09 ES ES281394A patent/ES281394A1/en not_active Expired
- 1962-10-09 FI FI180462A patent/FI40097C/en active
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369885A (en) * | 1964-02-12 | 1968-02-20 | Toyo Koatsu Ind Inc | Process for prilled urea-potassium metaphosphate fertilizer |
WO2005049193A1 (en) * | 2003-11-10 | 2005-06-02 | Dsm Ip Assets B.V. | Process for the preparation of urea granules |
EA009533B1 (en) * | 2003-11-10 | 2008-02-28 | ДСМ АйПи ЭССЕТС Б.В. | Process for the preparation of urea granules |
CN100434152C (en) * | 2003-11-10 | 2008-11-19 | 帝斯曼知识产权资产管理有限公司 | Process for the preparation of urea granules |
US7498055B2 (en) | 2003-11-10 | 2009-03-03 | Dsm Ip Assets B.V. | Process for the preparation of urea granules |
AU2004291238B2 (en) * | 2003-11-10 | 2009-09-17 | Stamicarbon B.V. | Process for the preparation of urea granules |
Also Published As
Publication number | Publication date |
---|---|
FI40097C (en) | 1968-10-10 |
CH411834A (en) | 1966-04-30 |
FI40097B (en) | 1968-06-28 |
ES281394A1 (en) | 1963-03-16 |
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