ES238105A1 - UN PROCEDIMIENTO PARA LA PRODUCCIoN DE UREA SUSTANCIALMENTE ANHIDRA - Google Patents

UN PROCEDIMIENTO PARA LA PRODUCCIoN DE UREA SUSTANCIALMENTE ANHIDRA

Info

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
free urea
substantially anhydrous
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
Application number
ES0238105A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Publication of ES238105A1 publication Critical patent/ES238105A1/es
Expired legal-status Critical Current

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.
ES0238105A 1956-10-26 1957-10-16 UN PROCEDIMIENTO PARA LA PRODUCCIoN DE UREA SUSTANCIALMENTE ANHIDRA Expired ES238105A1 (es)

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)

* Cited by examiner, † Cited by third party
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
CA2839657C (en) 2011-10-14 2018-06-26 Stamicarbon B.V. Urea finishing method
MX385161B (es) * 2016-05-03 2025-03-14 Stamicarbon Producción de urea con biuret controlado.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
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
US2643180A (en) * 1950-11-02 1953-06-23 Olin Mathieson Method of producing sodium nitrate
US2800177A (en) * 1950-11-02 1957-07-23 Olin Mathieson Production of fused salts from aqueous solutions thereof
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

Also Published As

Publication number Publication date
US3171770A (en) 1965-03-02

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