ES384310A1 - Process for the preparation of a high biuret product - Google Patents

Process for the preparation of a high biuret product

Info

Publication number
ES384310A1
ES384310A1 ES384310A ES384310A ES384310A1 ES 384310 A1 ES384310 A1 ES 384310A1 ES 384310 A ES384310 A ES 384310A ES 384310 A ES384310 A ES 384310A ES 384310 A1 ES384310 A1 ES 384310A1
Authority
ES
Spain
Prior art keywords
urea
mixture
weight
heating
preparation
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
ES384310A
Other languages
Spanish (es)
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Publication of ES384310A1 publication Critical patent/ES384310A1/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
    • C07C273/18—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 substituted ureas
    • C07C273/1872—Preparation of compounds comprising a -N-C(O)-N-C(O)-N- moiety
    • C07C273/1881—Preparation of compounds comprising a -N-C(O)-N-C(O)-N- moiety from urea

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A procedure for the preparation of a product with a high biuret content, characterized by heating to a temperature between 100º and 150ºC, for 10 minutes to 8 hours, a mixture of (A) a pyrolyzed urea reagent with a biuret content of up to 57% by weight and (B) a pyrolyzed material high in biuret and low in urea, the mixture being controlled so that its urea content does not exceed 20% by weight and heating in the presence of a liquid hydrocarbon as a vehicle that is refluxed at the heating temperature and is substantially non-solvent of urea and its self-condensation products by pyrolysis and inert against these substances and against ammonia, the relative proportions being included of the mixture and the hydrocarbon liquid vehicle between 5:95 and 60:40 by weight, respectively. (Machine-translation by Google Translate, not legally binding)
ES384310A 1969-10-09 1970-10-07 Process for the preparation of a high biuret product Expired ES384310A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86521169A 1969-10-09 1969-10-09

Publications (1)

Publication Number Publication Date
ES384310A1 true ES384310A1 (en) 1973-05-01

Family

ID=25344956

Family Applications (1)

Application Number Title Priority Date Filing Date
ES384310A Expired ES384310A1 (en) 1969-10-09 1970-10-07 Process for the preparation of a high biuret product

Country Status (12)

Country Link
AT (1) AT308135B (en)
BE (1) BE757246A (en)
CS (2) CS157685B2 (en)
DE (1) DE2049295C3 (en)
ES (1) ES384310A1 (en)
FR (1) FR2065103A5 (en)
GB (1) GB1324276A (en)
HU (1) HU165499B (en)
NL (1) NL7014757A (en)
NO (1) NO133666C (en)
PL (1) PL81098B1 (en)
ZA (1) ZA706627B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055598A (en) * 1972-04-07 1977-10-25 The Dow Chemical Company Process for preparation of urea autocondensation product
US3862223A (en) * 1973-04-02 1975-01-21 Dow Chemical Co Process for preparing triuret

Also Published As

Publication number Publication date
FR2065103A5 (en) 1971-07-23
CS157684B2 (en) 1974-09-16
PL81098B1 (en) 1975-08-30
DE2049295C3 (en) 1973-10-25
BE757246A (en) 1971-04-08
HU165499B (en) 1974-09-28
ZA706627B (en) 1971-10-27
AT308135B (en) 1973-06-25
DE2049295B2 (en) 1973-04-05
NL7014757A (en) 1971-04-14
GB1324276A (en) 1973-07-25
DE2049295A1 (en) 1971-07-22
CS157685B2 (en) 1974-09-16
NO133666B (en) 1976-03-01
NO133666C (en) 1976-06-09

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