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GB1404098A - Process for reducing the biuret content in urea - Google Patents

Process for reducing the biuret content in urea

Info

Publication number
GB1404098A
GB1404098A GB2327273A GB2327273A GB1404098A GB 1404098 A GB1404098 A GB 1404098A GB 2327273 A GB2327273 A GB 2327273A GB 2327273 A GB2327273 A GB 2327273A GB 1404098 A GB1404098 A GB 1404098A
Authority
GB
United Kingdom
Prior art keywords
urea
lines
columns
resin
ion
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
GB2327273A
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.)
MEXICO GUANOS
Original Assignee
MEXICO GUANOS
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 MEXICO GUANOS filed Critical MEXICO GUANOS
Priority to GB2327273A priority Critical patent/GB1404098A/en
Priority claimed from IT2416173A external-priority patent/IT987491B/en
Priority to AR253709A priority patent/AR213610A1/en
Priority to EG175/74A priority patent/EG11437A/en
Priority to BR3961/74A priority patent/BR7403961D0/en
Priority to FR7417058A priority patent/FR2229690B1/fr
Priority to ZA00743136A priority patent/ZA743136B/en
Priority to NL7406618A priority patent/NL7406618A/xx
Priority to SU742026956A priority patent/SU953978A3/en
Priority to DE19742423890 priority patent/DE2423890C3/en
Priority to BG026705A priority patent/BG21603A3/en
Priority to CH674574A priority patent/CH617672A5/en
Priority to AT406174A priority patent/AT344723B/en
Priority to CA200,114A priority patent/CA1019344A/en
Priority to BE144365A priority patent/BE815096A/en
Priority to SE7406519A priority patent/SE420196B/en
Priority to AU69046/74A priority patent/AU480560B2/en
Priority to IN1069/CAL/1974A priority patent/IN142126B/en
Priority to DD178556A priority patent/DD113897A5/xx
Priority to LU70102A priority patent/LU70102A1/xx
Priority to CS743519A priority patent/CS203001B2/en
Publication of GB1404098A publication Critical patent/GB1404098A/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)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

1404098 Ion-exchange GUANOS Y FER-TILIZANTES DE MEXICO SA 16 May 1973 23272/73 Heading BIJ [Also in Division C2] An apparatus suitable for the purification of urea by contacting it with an ion-exchange resin in a batch process comprises a column 11, containing the resin 12 supported on graded sand 13, surrounded by a steam jacket 14 and provided with inlet and outlet lines 15 and 16 respectively. The lines 15 and 16 are provided with lines 17 for introducing backwash liquid at the lower end of the column and removing some from the upper end. An apparatus suitable for the continuous purification of urea comprises three columns 21, 22, and 23 provided at their lower ends with inlets 30, 31 and 32 respectively and at their upper ends with outlets 36, 37 and 38 respectively. The lower ends of columns 21, 22 and 23 are connected via lines 24, 26 and 28 respectively to the upper parts of columns 22, 23 and 21 respectively so that partially exhausted resin can be regenerated, and recycled. For Figure see next page
GB2327273A 1973-05-16 1973-05-16 Process for reducing the biuret content in urea Expired GB1404098A (en)

Priority Applications (20)

Application Number Priority Date Filing Date Title
GB2327273A GB1404098A (en) 1973-05-16 1973-05-16 Process for reducing the biuret content in urea
AR253709A AR213610A1 (en) 1973-05-16 1974-05-13 A PROCEDURE FOR REMOVING ALL UNWANTED CONTENT OF BIURET FROM UREA CONTAINED IN A SUBSTANCE INCLUDING BIURET AND UREA
EG175/74A EG11437A (en) 1973-05-16 1974-05-15 Process for reducing the buiret content in urea
BR3961/74A BR7403961D0 (en) 1973-05-16 1974-05-15 PROCESS TO REDUCE THE UREA BIURET CONTENT
CS743519A CS203001B2 (en) 1973-05-16 1974-05-16 Method for reducing content of biuret or its metallic complex in urea solution
CH674574A CH617672A5 (en) 1973-05-16 1974-05-16 Process for reducing the biuret content in urea
BE144365A BE815096A (en) 1973-05-16 1974-05-16 PROCESS FOR DECREASING THE BIURET CONTENT OF THE UREA
NL7406618A NL7406618A (en) 1973-05-16 1974-05-16
SU742026956A SU953978A3 (en) 1973-05-16 1974-05-16 Process for purifying carbamide from biuret impurities
DE19742423890 DE2423890C3 (en) 1973-05-16 1974-05-16 Process for the production of urea with reduced biuret content
BG026705A BG21603A3 (en) 1973-05-16 1974-05-16 METHOD FOR REDUCING THE AMOUNT OF BIORETH IN UREA
FR7417058A FR2229690B1 (en) 1973-05-16 1974-05-16
AT406174A AT344723B (en) 1973-05-16 1974-05-16 METHOD FOR REDUCING THE BIURET CONTENT OF UREA
CA200,114A CA1019344A (en) 1973-05-16 1974-05-16 Process for reducing the biuret content in urea
ZA00743136A ZA743136B (en) 1973-05-16 1974-05-16 Process for reducing the biuret content in urea
SE7406519A SE420196B (en) 1973-05-16 1974-05-16 PROCEDURE FOR REDUCING CARBAMID BIURETIC CONTENTS
AU69046/74A AU480560B2 (en) 1973-05-16 1974-05-16 Process for reducing the biuret content in urea
IN1069/CAL/1974A IN142126B (en) 1973-05-16 1974-05-16
DD178556A DD113897A5 (en) 1973-05-16 1974-05-16
LU70102A LU70102A1 (en) 1973-05-16 1974-05-16

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2327273A GB1404098A (en) 1973-05-16 1973-05-16 Process for reducing the biuret content in urea
IT2416173A IT987491B (en) 1973-05-16 1973-05-16 PROCEDURE TO REDUCE THE CONTENT OF BIURET IN THE UREA

Publications (1)

Publication Number Publication Date
GB1404098A true GB1404098A (en) 1975-08-28

Family

ID=26256424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2327273A Expired GB1404098A (en) 1973-05-16 1973-05-16 Process for reducing the biuret content in urea

Country Status (18)

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

Cited By (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
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
WO2021004713A1 (en) 2019-07-10 2021-01-14 Thyssenkrupp Industrial Solutions Ag Reduction of biuret generation in the production of urea
CN115738359A (en) * 2022-10-20 2023-03-07 江苏可兰素环保科技有限公司 Extraction and purification process of urea granules

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RO131559A2 (en) * 2011-11-23 2016-12-30 Farid Alekovich Batullin Method for preparing crystalline carbamide of high purity

Cited By (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
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
WO2021004713A1 (en) 2019-07-10 2021-01-14 Thyssenkrupp Industrial Solutions Ag Reduction of biuret generation in the production of urea
CN115738359A (en) * 2022-10-20 2023-03-07 江苏可兰素环保科技有限公司 Extraction and purification process of urea granules

Also Published As

Publication number Publication date
CH617672A5 (en) 1980-06-13
AU6904674A (en) 1975-11-20
LU70102A1 (en) 1976-04-13
BG21603A3 (en) 1976-07-20
CA1019344A (en) 1977-10-18
AT344723B (en) 1978-08-10
EG11437A (en) 1977-08-15
BR7403961D0 (en) 1974-12-24
ATA406174A (en) 1977-12-15
ZA743136B (en) 1975-08-27
DE2423890A1 (en) 1974-12-12
AR213610A1 (en) 1979-02-28
SU953978A3 (en) 1982-08-23
NL7406618A (en) 1974-11-19
FR2229690B1 (en) 1976-12-24
BE815096A (en) 1974-11-18
SE420196B (en) 1981-09-21
DE2423890B2 (en) 1976-04-15
DD113897A5 (en) 1975-07-05
IN142126B (en) 1977-06-04
FR2229690A1 (en) 1974-12-13
CS203001B2 (en) 1981-02-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee