ES238105A1 - UN PROCEDIMIENTO PARA LA PRODUCCIoN DE UREA SUSTANCIALMENTE ANHIDRA - Google Patents
UN PROCEDIMIENTO PARA LA PRODUCCIoN DE UREA SUSTANCIALMENTE ANHIDRAInfo
- Publication number
- ES238105A1 ES238105A1 ES0238105A ES238105A ES238105A1 ES 238105 A1 ES238105 A1 ES 238105A1 ES 0238105 A ES0238105 A ES 0238105A ES 238105 A ES238105 A ES 238105A ES 238105 A1 ES238105 A1 ES 238105A1
- Authority
- ES
- Spain
- Prior art keywords
- urea
- production
- biuret
- melt
- solution
- 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
- 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)
Abstract
Procedimiento para la producción de urea sustancialmente anhidra, caracterizado por concentrar una solución acuosa de urea hasta una concentración de aproximadamente 87 a 96% en peso de urea en el vacio a una presión superior a 200mms. Hg y someter luego dicha solución concentrada a una segunda evaporación en una segunda fase bajo un vacio menor de 100mms.Hg, mientras se retira el vapor acuoso de ella de modo que se obtenga una papilla de urea sólida en una solución de urea, retirar dicha papilla de urea como fusión mientras se le aporta continuamente calor y controlar dicha aportación de calor de manera que la temperatura de salida de dicha fusión se mantenga por debajo de 145ºC.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL211715 | 1956-10-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES238105A1 true ES238105A1 (es) | 1958-04-01 |
Family
ID=19750807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES0238105A Expired ES238105A1 (es) | 1956-10-26 | 1957-10-16 | UN PROCEDIMIENTO PARA LA PRODUCCIoN DE UREA SUSTANCIALMENTE ANHIDRA |
Country Status (2)
Country | Link |
---|---|
US (1) | US3171770A (es) |
ES (1) | ES238105A1 (es) |
Families Citing this family (5)
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 |
NL8304211A (nl) * | 1983-12-07 | 1985-07-01 | Unie Van Kunstmestfab Bv | Werkwijze voor het concentreren tot een practisch watervrije smelt van een reeds geconcentreerde ureumoplossing. |
DE10139142A1 (de) * | 2001-08-09 | 2003-02-20 | Bosch Gmbh Robert | Abgasbehandlungseinheit und Messvorrichtung zur Ermittlung einer Konzentration einer Harnstoff-Wasser-Lösung |
AP3926A (en) | 2011-10-14 | 2016-12-10 | Stamicarbon | Urea finishing method |
UA123548C2 (uk) * | 2016-05-03 | 2021-04-21 | Стамікарбон Б.В. | Виробництво карбаміду з контрольованим біуретом |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB177056A (en) * | 1921-03-17 | 1922-03-23 | Metallbank & Metallurg Ges Ag | Method for the evaporation, concentration and drying of solutions of urea |
GB189787A (en) * | 1921-11-29 | 1923-09-06 | Soc Produits Azotes Sa | Improvements in the isolation of urea |
ES123585A1 (es) * | 1930-11-04 | 1931-09-01 | R S I G Farbenindustrie Ag | Procedimiento para la produccion de sosa caustica anhidra fundida |
US2267133A (en) * | 1939-02-20 | 1941-12-23 | Solvay Process Co | Process for treating urea synthesis effluents |
US2327333A (en) * | 1941-06-20 | 1943-08-17 | Du Pont | Drying process |
US2712557A (en) * | 1950-02-07 | 1955-07-05 | Basf Ag | Manufacture of urea |
US2800177A (en) * | 1950-11-02 | 1957-07-23 | Olin Mathieson | Production of fused salts from aqueous solutions thereof |
US2643180A (en) * | 1950-11-02 | 1953-06-23 | Olin Mathieson | Method of producing sodium nitrate |
DE928587C (de) * | 1951-02-17 | 1955-06-06 | Basf Ag | Vorrichtung zum fraktionierten Destillieren von Mehrstoffgemischen |
US2744133A (en) * | 1953-04-24 | 1956-05-01 | Inventa Ag | Process for the production of low-biuret content urea |
US2857962A (en) * | 1954-01-29 | 1958-10-28 | Rodney Hunt Machine Co | Methods for treating latices |
-
1957
- 1957-10-16 US US690503A patent/US3171770A/en not_active Expired - Lifetime
- 1957-10-16 ES ES0238105A patent/ES238105A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3171770A (en) | 1965-03-02 |
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