GB1156099A - Improvements in and relating to the Production of Auto-Condensation Products of Urea, in Particular Biuret. - Google Patents

Improvements in and relating to the Production of Auto-Condensation Products of Urea, in Particular Biuret.

Info

Publication number
GB1156099A
GB1156099A GB30575/67A GB3057567A GB1156099A GB 1156099 A GB1156099 A GB 1156099A GB 30575/67 A GB30575/67 A GB 30575/67A GB 3057567 A GB3057567 A GB 3057567A GB 1156099 A GB1156099 A GB 1156099A
Authority
GB
United Kingdom
Prior art keywords
urea
cyanuric acid
biuret
auto
relating
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
GB30575/67A
Inventor
David Graham Shipley
Noel Watchorn
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB30575/67A priority Critical patent/GB1156099A/en
Priority to IE76368A priority patent/IE32160B1/en
Priority to NL6809275A priority patent/NL6809275A/xx
Priority to BE717459D priority patent/BE717459A/xx
Priority to DE19681768804 priority patent/DE1768804A1/en
Priority to FR1571861D priority patent/FR1571861A/fr
Priority to AT636468A priority patent/AT285621B/en
Publication of GB1156099A publication Critical patent/GB1156099A/en
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

1,156,099. Cyanuric acid. IMPERIAL CHEMICAL INDUSTRIES Ltd. 29 May, 1968. [3 July, 1967], No. 30575/67. Heading C1A. [Also in Division C2] Cyanuric acid (and biuret and triuret) is prepared by the pyrolysis of urea in one or more reactors by drawing off the molten mixture (containing cyanuric acid and urea, biuret and triuret) from the reactor(s), dissolving said mixture in water, adding to the solution a complexing agent to precipitate out the urea, and crystallizing out cyanuric acid from the solution. Cyanuric acid (and the other autocondensation products) may be crystallized out before removing the urea with the complexing agent (a saturated straight-chain hydrocarbon or a hydrocarbon derivative).
GB30575/67A 1967-07-03 1967-07-03 Improvements in and relating to the Production of Auto-Condensation Products of Urea, in Particular Biuret. Expired GB1156099A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB30575/67A GB1156099A (en) 1967-07-03 1967-07-03 Improvements in and relating to the Production of Auto-Condensation Products of Urea, in Particular Biuret.
IE76368A IE32160B1 (en) 1967-07-03 1968-06-26 Improvements in and relating to the production of auto-condensation products of urea,in particular biuret
NL6809275A NL6809275A (en) 1967-07-03 1968-07-01
BE717459D BE717459A (en) 1967-07-03 1968-07-01
DE19681768804 DE1768804A1 (en) 1967-07-03 1968-07-02 Process for the production of autocondensation products of urea and for their separation from the resulting mixtures
FR1571861D FR1571861A (en) 1967-07-03 1968-07-03
AT636468A AT285621B (en) 1967-07-03 1968-07-03 Process for the production of autocondensation products of urea, in particular biuret, triuret and cyanuric acid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB30575/67A GB1156099A (en) 1967-07-03 1967-07-03 Improvements in and relating to the Production of Auto-Condensation Products of Urea, in Particular Biuret.
GB3057568 1968-05-29

Publications (1)

Publication Number Publication Date
GB1156099A true GB1156099A (en) 1969-06-25

Family

ID=26260507

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30575/67A Expired GB1156099A (en) 1967-07-03 1967-07-03 Improvements in and relating to the Production of Auto-Condensation Products of Urea, in Particular Biuret.

Country Status (5)

Country Link
BE (1) BE717459A (en)
DE (1) DE1768804A1 (en)
FR (1) FR1571861A (en)
GB (1) GB1156099A (en)
NL (1) NL6809275A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935260A (en) * 1970-10-21 1976-01-27 African Explosives & Chemical Industries Limited Auto-condensation products of urea
US4345099A (en) * 1981-08-10 1982-08-17 Union Oil Company Of California Method of selectively removing biuret from urea and compositions for use therein
US4645860A (en) * 1983-12-30 1987-02-24 Union Oil Company Of California Biuret manufacture
US4645859A (en) * 1983-12-30 1987-02-24 Union Oil Company Of California Methods for purifying biuret
US4698443A (en) * 1985-07-10 1987-10-06 Union Oil Company Of California Biuret purification
US7753985B2 (en) 2004-02-05 2010-07-13 Uhde Gmbh Reduction of biuret and free ammonia during a method for producing fertilizer granulates containing urea

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935260A (en) * 1970-10-21 1976-01-27 African Explosives & Chemical Industries Limited Auto-condensation products of urea
US4345099A (en) * 1981-08-10 1982-08-17 Union Oil Company Of California Method of selectively removing biuret from urea and compositions for use therein
US4645860A (en) * 1983-12-30 1987-02-24 Union Oil Company Of California Biuret manufacture
US4645859A (en) * 1983-12-30 1987-02-24 Union Oil Company Of California Methods for purifying biuret
US4698443A (en) * 1985-07-10 1987-10-06 Union Oil Company Of California Biuret purification
US7753985B2 (en) 2004-02-05 2010-07-13 Uhde Gmbh Reduction of biuret and free ammonia during a method for producing fertilizer granulates containing urea

Also Published As

Publication number Publication date
FR1571861A (en) 1969-06-20
BE717459A (en) 1969-01-02
NL6809275A (en) 1969-01-07
DE1768804A1 (en) 1972-01-05

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