GB1194218A - Process for producing Crystalline Urea and apparatus for use therein - Google Patents
Process for producing Crystalline Urea and apparatus for use thereinInfo
- Publication number
- GB1194218A GB1194218A GB44451/67A GB4445167A GB1194218A GB 1194218 A GB1194218 A GB 1194218A GB 44451/67 A GB44451/67 A GB 44451/67A GB 4445167 A GB4445167 A GB 4445167A GB 1194218 A GB1194218 A GB 1194218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- solution
- crystals
- crystallization
- biuret content
- 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
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title abstract 17
- 239000004202 carbamide Substances 0.000 title abstract 17
- 238000000034 method Methods 0.000 title abstract 2
- 239000013078 crystal Substances 0.000 abstract 6
- 238000002425 crystallisation Methods 0.000 abstract 6
- 230000008025 crystallization Effects 0.000 abstract 6
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 abstract 5
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 230000001788 irregular Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
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 |
|---|---|---|---|
| US58283066A | 1966-09-29 | 1966-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1194218A true GB1194218A (en) | 1970-06-10 |
Family
ID=24330658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB44451/67A Expired GB1194218A (en) | 1966-09-29 | 1967-09-29 | Process for producing Crystalline Urea and apparatus for use therein |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3585237A (enExample) |
| JP (1) | JPS4910485B1 (enExample) |
| BE (1) | BE704517A (enExample) |
| GB (1) | GB1194218A (enExample) |
| NL (1) | NL6713312A (enExample) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4069253A (en) * | 1970-07-01 | 1978-01-17 | Mitsui Toatsu Chemicals, Incorporated | Process for the production of water-free molten urea |
| US3859052A (en) * | 1972-08-15 | 1975-01-07 | Joh A Benckiser Chem Fab Gmbh | Crystallization apparatus having pressure-liquid level control means |
| JPS5227795U (enExample) * | 1975-08-19 | 1977-02-26 | ||
| JPS52110723U (enExample) * | 1976-02-20 | 1977-08-23 | ||
| US4231839A (en) * | 1979-01-30 | 1980-11-04 | Cf Industries, Inc. | After-treatment processes and apparatus, especially for urea and ammonium nitrate plants |
| JPH0731918U (ja) * | 1993-11-16 | 1995-06-16 | 北日本産業株式会社 | ライン塗装を付した縁石ブロック |
| HRP20181399T1 (hr) * | 2011-10-14 | 2018-10-19 | Stamicarbon B.V. | Postupak za završnu obradu uree |
| US9138670B2 (en) | 2012-10-26 | 2015-09-22 | General Electric Company | System and method for syngas treatment |
| PL3169419T3 (pl) * | 2014-07-17 | 2020-07-13 | Stamicarbon B.V. | Sposób wykonania produktu mocznikowego |
-
1966
- 1966-09-29 US US582830A patent/US3585237A/en not_active Expired - Lifetime
-
1967
- 1967-09-27 JP JP42062200A patent/JPS4910485B1/ja active Pending
- 1967-09-29 GB GB44451/67A patent/GB1194218A/en not_active Expired
- 1967-09-29 BE BE704517D patent/BE704517A/xx unknown
- 1967-09-29 NL NL6713312A patent/NL6713312A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE704517A (enExample) | 1968-03-29 |
| US3585237A (en) | 1971-06-15 |
| JPS4910485B1 (enExample) | 1974-03-11 |
| NL6713312A (enExample) | 1968-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1194218A (en) | Process for producing Crystalline Urea and apparatus for use therein | |
| GB1146206A (en) | Apparatus for producing rod-like articles | |
| DE3061558D1 (en) | Improved counter current crystallization process | |
| ES306649A1 (es) | Un procedimiento para recuperacion continua de p-xileno a partir de mezclas liquidas que contienen p-xileno. | |
| Wada et al. | Ferroelectricity and Dielectric Critical Slowing-Down in LiNaGe4O9 Single Cyrstal | |
| IT7825713A0 (it) | Derivati d'acido ciclopropancarbossilico, processo per la loro produzione e loro impiego come prodotti per laproduzione d'insetticidi. | |
| FR2297193A1 (fr) | Procede de production de produits a faible poids specifique apparent, renfermant au moins 10 % de sel de wegscheider, et nouveaux produits ainsi obtenus | |
| SE7606601L (sv) | Sett for kristallisation av aluminiumsulfatlosningar till dammfria granuler med jemn kornstorlek | |
| ES449842A1 (es) | Procedimiento para preparar peroxido de carbono sodico cris-talino seco y de libre fluencia. | |
| Leontiev et al. | PHASE DIAGRAM OF PBZR 1-XTIXO 3 WITH X< 0. 1 | |
| Kasatkin | State of Yb impurities in InP crystals. | |
| JPS5277899A (en) | Production of lithium ferrosilicate single crystal | |
| PT65579A (en) | Process and apparatus for production of synthetic filaments from melts | |
| SU1079609A1 (ru) | Способ получени хлорида натри | |
| Comera et al. | Process and Apparatus for Continuously Controlling the Supercooling of the Solidification Front of a Single Crystal During Its Development, and Use in Its Growth Control | |
| ATE15483T1 (de) | Verfahren zur herstellung von ammoniumnitrat enthaltenden, thermisch bestaendigen koernern mit hohere sturzdichte. | |
| JPS5798220A (en) | Production of fluorene | |
| TANTRAPORN | Improvement of GaAs crystal quality by means of liquid-solid interface curvature control[Final Report, 1 Jun. 1976- 31 May 1977] | |
| JPS521123A (en) | Method for melt spinning | |
| JPS55126596A (en) | Production of single crystal | |
| Winer et al. | Density and Surface Tension as Parameters in the Processing of Mineral Insulation | |
| Lallemand et al. | Experimental Study of the Thermal Parameters Affecting the Purity of Ga Crystals Grown From the Melt | |
| Oleszak et al. | Crystallization of Fe--B Metallic Glasses.(Retroactive Coverage) | |
| Dittmar | Growing Homogeneous Mixed Crystals With Greater Segregation Tendencies by the Bridgman Method With Example of Pseudobinary System Cd sub xHg sub 1--xTe | |
| Gnilov et al. | Calculating the Accumulation of Impurities During Successive Cycles of Semiconductor Production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |