FR2229690A1 - - Google Patents

Info

Publication number
FR2229690A1
FR2229690A1 FR7417058A FR7417058A FR2229690A1 FR 2229690 A1 FR2229690 A1 FR 2229690A1 FR 7417058 A FR7417058 A FR 7417058A FR 7417058 A FR7417058 A FR 7417058A FR 2229690 A1 FR2229690 A1 FR 2229690A1
Authority
FR
France
Prior art keywords
urea
column
solution
carried out
resin
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.)
Granted
Application number
FR7417058A
Other languages
English (en)
Other versions
FR2229690B1 (fr
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.)
GUANOS FERTILIZANTES MEXICO SA
Original Assignee
GUANOS FERTILIZANTES MEXICO SA
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
Priority claimed from IT2416173A external-priority patent/IT987491B/it
Application filed by GUANOS FERTILIZANTES MEXICO SA filed Critical GUANOS FERTILIZANTES MEXICO SA
Publication of FR2229690A1 publication Critical patent/FR2229690A1/fr
Application granted granted Critical
Publication of FR2229690B1 publication Critical patent/FR2229690B1/fr
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)
  • Phenolic Resins Or Amino Resins (AREA)
FR7417058A 1973-05-16 1974-05-16 Expired FR2229690B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2416173A IT987491B (it) 1973-05-16 1973-05-16 Procedimento per ridurre il con tenuto di biureto nella urea
GB2327273A GB1404098A (en) 1973-05-16 1973-05-16 Process for reducing the biuret content in urea

Publications (2)

Publication Number Publication Date
FR2229690A1 true FR2229690A1 (fr) 1974-12-13
FR2229690B1 FR2229690B1 (fr) 1976-12-24

Family

ID=26256424

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7417058A Expired FR2229690B1 (fr) 1973-05-16 1974-05-16

Country Status (18)

Country Link
AR (1) AR213610A1 (fr)
AT (1) AT344723B (fr)
BE (1) BE815096A (fr)
BG (1) BG21603A3 (fr)
BR (1) BR7403961D0 (fr)
CA (1) CA1019344A (fr)
CH (1) CH617672A5 (fr)
CS (1) CS203001B2 (fr)
DD (1) DD113897A5 (fr)
EG (1) EG11437A (fr)
FR (1) FR2229690B1 (fr)
GB (1) GB1404098A (fr)
IN (1) IN142126B (fr)
LU (1) LU70102A1 (fr)
NL (1) NL7406618A (fr)
SE (1) SE420196B (fr)
SU (1) SU953978A3 (fr)
ZA (1) ZA743136B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE102004005907B4 (de) 2004-02-05 2006-01-05 Uhde Gmbh Anlage zur Herstellung von biuretarmem harnstoffhaltigem Düngemittelgranulat
RO131559A2 (ro) * 2011-11-23 2016-12-30 Farid Alekovich Batullin Metodă pentru obţinerea carbamidei cristaline cu puritate ridicată
DE102019118702A1 (de) 2019-07-10 2021-01-14 Thyssenkrupp Ag Reduzierung der biuretgeneration in der harnstoffproduktion

Also Published As

Publication number Publication date
DE2423890B2 (de) 1976-04-15
NL7406618A (fr) 1974-11-19
CH617672A5 (en) 1980-06-13
DD113897A5 (fr) 1975-07-05
SE420196B (sv) 1981-09-21
IN142126B (fr) 1977-06-04
DE2423890A1 (de) 1974-12-12
BR7403961D0 (pt) 1974-12-24
ZA743136B (en) 1975-08-27
AU6904674A (en) 1975-11-20
BE815096A (fr) 1974-11-18
AR213610A1 (es) 1979-02-28
LU70102A1 (fr) 1976-04-13
CA1019344A (fr) 1977-10-18
BG21603A3 (bg) 1976-07-20
SU953978A3 (ru) 1982-08-23
CS203001B2 (en) 1981-02-27
FR2229690B1 (fr) 1976-12-24
GB1404098A (en) 1975-08-28
AT344723B (de) 1978-08-10
ATA406174A (de) 1977-12-15
EG11437A (en) 1977-08-15

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Legal Events

Date Code Title Description
ST Notification of lapse