GB800446A - Improvements in the production of urea melt poor in biuret - Google Patents

Improvements in the production of urea melt poor in biuret

Info

Publication number
GB800446A
GB800446A GB26818/56A GB2681856A GB800446A GB 800446 A GB800446 A GB 800446A GB 26818/56 A GB26818/56 A GB 26818/56A GB 2681856 A GB2681856 A GB 2681856A GB 800446 A GB800446 A GB 800446A
Authority
GB
United Kingdom
Prior art keywords
biuret
production
melt
urea melt
poor
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
GB26818/56A
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.)
BASF SE
Original Assignee
Badische Anilin and Sodafabrik AG
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 Badische Anilin and Sodafabrik AG filed Critical Badische Anilin and Sodafabrik AG
Publication of GB800446A publication Critical patent/GB800446A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C275/00—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C275/04—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to acyclic carbon atoms
    • 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
    • C07C273/04—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 from carbon dioxide and ammonia
    • 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)

Abstract

Urea melts poor in biuret are prepared from urea melts prepared by the reaction of ammonia and carbon dioxide under pressure by cooling the initial biuret-containing melt to a temperature of 160 DEG C. or less while maintaining a pressure of more than 100 atmospheres and then decompressing to normal pressure. The cooling to 160 DEG C. or less may be effected by partial decompression of the melt to 150 atmospheres or by spraying liquid ammonia into the melt.
GB26818/56A 1955-09-09 1956-09-03 Improvements in the production of urea melt poor in biuret Expired GB800446A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB37112A DE963420C (en) 1955-09-09 1955-09-09 Process for the production of a low-biuret urea melt

Publications (1)

Publication Number Publication Date
GB800446A true GB800446A (en) 1958-08-27

Family

ID=6254878

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26818/56A Expired GB800446A (en) 1955-09-09 1956-09-03 Improvements in the production of urea melt poor in biuret

Country Status (5)

Country Link
CH (1) CH345882A (en)
DE (1) DE963420C (en)
FR (1) FR1158519A (en)
GB (1) GB800446A (en)
NL (1) NL98210C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114681A (en) * 1957-05-18 1963-12-17 Stamicarbon Process of recovering unreacted ammonia from a urea synthesis melt by a two stage rectification operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114681A (en) * 1957-05-18 1963-12-17 Stamicarbon Process of recovering unreacted ammonia from a urea synthesis melt by a two stage rectification operation

Also Published As

Publication number Publication date
CH345882A (en) 1960-04-30
NL98210C (en) 1961-06-15
DE963420C (en) 1957-05-09
FR1158519A (en) 1958-06-16

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