GB1324276A – Process for the preparation of a high biuret product
– Google Patents
GB1324276A – Process for the preparation of a high biuret product
– Google Patents
Process for the preparation of a high biuret product
Info
Publication number
GB1324276A
GB1324276A
GB4793270A
GB4793270A
GB1324276A
GB 1324276 A
GB1324276 A
GB 1324276A
GB 4793270 A
GB4793270 A
GB 4793270A
GB 4793270 A
GB4793270 A
GB 4793270A
GB 1324276 A
GB1324276 A
GB 1324276A
Authority
GB
United Kingdom
Prior art keywords
urea
biuret
content
mixture
temperature
Prior art date
1969-10-09
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
GB4793270A
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.)
1969-10-09
Filing date
1970-10-08
Publication date
1973-07-25
1970-10-08
Application filed by Dow Chemical Co
filed
Critical
Dow Chemical Co
1973-07-25
Publication of GB1324276A
publication
Critical
patent/GB1324276A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
Abstract
1324276 Biuret DOW CHEMICAL CO 8 Oct 1970 [9 Oct 1969] 47932/70 Heading C2C A process for preparing biuret comprises heating a mixture of (a) a pyrolysed urea feedstock having a maximum biuret content of 55 weight per cent and (b) a biuret-urea pyrolysate having a maximum urea content of 15 weight per cent and a minimum biuret content of 60 weight per cent, the overall urea content of the mixture being less than 20% by weight, at a temperature of from 100‹ to 150‹ C. for from 10 minutes to 8 hours in the presence of an inert liquid hydrocarbon which is at reflux at the temperature of heating, the mixture : hydrocarbon weight ratio being from 5 : 95 to 60 : 40. The pyrolysed urea feedstock is suitably obtained by initially heating urea at from 150‹ to 240‹ C. and then at a temperature of from 110‹ to 145‹ C. in the presence of an inert gas sparge to remove by-product ammonia.
GB4793270A
1969-10-09
1970-10-08
Process for the preparation of a high biuret product
Expired
GB1324276A
(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
GB1324276A
true
GB1324276A
(en)
1973-07-25
Family
ID=25344956
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4793270A
Expired
GB1324276A
(en)
1969-10-09
1970-10-08
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
0
BE
BE757246D
patent/BE757246A/en
unknown
1970
1970-09-29
ZA
ZA706627*A
patent/ZA706627B/en
unknown
1970-10-07
ES
ES384310A
patent/ES384310A1/en
not_active
Expired
1970-10-07
FR
FR7036146A
patent/FR2065103A5/fr
not_active
Expired
1970-10-07
DE
DE2049295A
patent/DE2049295C3/en
not_active
Expired
1970-10-08
AT
AT909270A
patent/AT308135B/en
not_active
IP Right Cessation
1970-10-08
PL
PL1970143826A
patent/PL81098B1/pl
unknown
1970-10-08
NO
NO3802/70A
patent/NO133666C/no
unknown
1970-10-08
CS
CS708401A
patent/CS157685B2/en
unknown
1970-10-08
GB
GB4793270A
patent/GB1324276A/en
not_active
Expired
1970-10-08
HU
HUCE784A
patent/HU165499B/hu
unknown
1970-10-08
NL
NL7014757A
patent/NL7014757A/xx
unknown
1970-10-08
CS
CS706802A
patent/CS157684B2/en
unknown
Also Published As
Publication number
Publication date
CS157685B2
(en)
1974-09-16
NO133666C
(en)
1976-06-09
CS157684B2
(en)
1974-09-16
DE2049295C3
(en)
1973-10-25
AT308135B
(en)
1973-06-25
DE2049295A1
(en)
1971-07-22
FR2065103A5
(en)
1971-07-23
NL7014757A
(en)
1971-04-14
NO133666B
(en)
1976-03-01
BE757246A
(en)
1971-04-08
HU165499B
(en)
1974-09-28
ZA706627B
(en)
1971-10-27
DE2049295B2
(en)
1973-04-05
ES384310A1
(en)
1973-05-01
PL81098B1
(en)
1975-08-30
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Legal Events
Date
Code
Title
Description
1973-12-05
PS
Patent sealed
1979-05-16
PCNP
Patent ceased through non-payment of renewal fee
