DE3469356D1 - Process for concentrating an already concentrated urea solution to form a practically anhydrous melt - Google Patents

Process for concentrating an already concentrated urea solution to form a practically anhydrous melt

Info

Publication number
DE3469356D1
DE3469356D1 DE8484114748T DE3469356T DE3469356D1 DE 3469356 D1 DE3469356 D1 DE 3469356D1 DE 8484114748 T DE8484114748 T DE 8484114748T DE 3469356 T DE3469356 T DE 3469356T DE 3469356 D1 DE3469356 D1 DE 3469356D1
Authority
DE
Germany
Prior art keywords
urea solution
concentrating
practically anhydrous
urea
anhydrous 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
Application number
DE8484114748T
Other languages
German (de)
English (en)
Inventor
Cornelis Verweel
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19842845&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3469356(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Application granted granted Critical
Publication of DE3469356D1 publication Critical patent/DE3469356D1/de
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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fertilizers (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
DE8484114748T 1983-12-07 1984-12-04 Process for concentrating an already concentrated urea solution to form a practically anhydrous melt Expired DE3469356D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8304211A NL8304211A (nl) 1983-12-07 1983-12-07 Werkwijze voor het concentreren tot een practisch watervrije smelt van een reeds geconcentreerde ureumoplossing.

Publications (1)

Publication Number Publication Date
DE3469356D1 true DE3469356D1 (en) 1988-03-24

Family

ID=19842845

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484114748T Expired DE3469356D1 (en) 1983-12-07 1984-12-04 Process for concentrating an already concentrated urea solution to form a practically anhydrous melt

Country Status (8)

Country Link
EP (1) EP0144964B1 (enExample)
JP (1) JPS60185756A (enExample)
AT (1) ATE32510T1 (enExample)
CA (1) CA1244052A (enExample)
DE (1) DE3469356D1 (enExample)
IN (1) IN163016B (enExample)
NL (1) NL8304211A (enExample)
SU (1) SU1428192A3 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302213A1 (en) * 1987-08-04 1989-02-08 Ammonia Casale S.A. Process for the recovery of urea entrained by vapours in vacuum concentration systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1184991A (fr) * 1956-10-26 1959-07-28 Stamicarbon Procédé pour concentrer des solutions d'urée en une masse sensiblement exempte d'eau
US3171770A (en) * 1956-10-26 1965-03-02 Stamicarbon Process for the production of substantially anhydrous and substantially biuret-free urea

Also Published As

Publication number Publication date
EP0144964B1 (en) 1988-02-17
EP0144964A3 (en) 1985-07-17
JPS60185756A (ja) 1985-09-21
NL8304211A (nl) 1985-07-01
IN163016B (enExample) 1988-07-30
CA1244052A (en) 1988-11-01
ATE32510T1 (de) 1988-03-15
EP0144964A2 (en) 1985-06-19
SU1428192A3 (ru) 1988-09-30

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee
8331 Complete revocation
8380 Miscellaneous part iii

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