DE1618926B1 - Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt - Google Patents

Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt

Info

Publication number
DE1618926B1
DE1618926B1 DE1967S0110929 DES0110929A DE1618926B1 DE 1618926 B1 DE1618926 B1 DE 1618926B1 DE 1967S0110929 DE1967S0110929 DE 1967S0110929 DE S0110929 A DES0110929 A DE S0110929A DE 1618926 B1 DE1618926 B1 DE 1618926B1
Authority
DE
Germany
Prior art keywords
urea
biuret
ammonium carbamate
production
mother liquors
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.)
Withdrawn
Application number
DE1967S0110929
Other languages
German (de)
English (en)
Inventor
Mario Dr-Ing Guadalupi
Umberto Dr-Ing Zardi
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.)
SnamProgetti SpA
Original Assignee
SnamProgetti SpA
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 SnamProgetti SpA filed Critical SnamProgetti SpA
Publication of DE1618926B1 publication Critical patent/DE1618926B1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • 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
    • C07C273/04—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 from carbon dioxide and ammonia
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
DE1967S0110929 1966-07-27 1967-07-21 Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt Withdrawn DE1618926B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2073366 1966-07-27

Publications (1)

Publication Number Publication Date
DE1618926B1 true DE1618926B1 (de) 1971-01-28

Family

ID=11171223

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1967S0110929 Withdrawn DE1618926B1 (de) 1966-07-27 1967-07-21 Verfahren zur Herstellung von Harnstoff mit niedrigem Biuretgehalt

Country Status (12)

Country Link
JP (1) JPS5127659B1 (el)
BE (1) BE701633A (el)
BR (1) BR6791527D0 (el)
CH (1) CH471089A (el)
CS (1) CS163163B2 (el)
DE (1) DE1618926B1 (el)
ES (1) ES343801A1 (el)
GR (1) GR33978B (el)
LU (1) LU54171A1 (el)
NL (1) NL145849B (el)
SE (1) SE387334B (el)
YU (1) YU33783B (el)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059760A1 (de) * 2006-12-18 2008-06-19 Skw Stickstoffwerke Piesteritz Gmbh Verfahren zur kontinuierlichen Herstellung von hochreiner Harnstofflösung
EP3199518A4 (en) * 2014-09-22 2018-03-28 Toyo Engineering Corporation Process for producing high-purity aqueous urea solution in urea production process

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52139164U (el) * 1976-04-13 1977-10-21
JPS52163463U (el) * 1976-06-02 1977-12-10
JPS6114665U (ja) * 1984-07-02 1986-01-28 和也 生駒 容器
ITMI20120013A1 (it) 2012-01-09 2013-07-10 Saipem Spa Procedimento per la sintesi di urea comprendente un flusso di passivazione a fondo stripper

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232984A (en) * 1961-11-20 1966-02-01 Pullman Inc Low biuret urea
US3255246A (en) * 1963-06-27 1966-06-07 Du Pont Synthesis and recovery of urea
US3318951A (en) * 1963-04-11 1967-05-09 Stamicarbon Preparation of urea with a low biuret content

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232984A (en) * 1961-11-20 1966-02-01 Pullman Inc Low biuret urea
US3318951A (en) * 1963-04-11 1967-05-09 Stamicarbon Preparation of urea with a low biuret content
US3255246A (en) * 1963-06-27 1966-06-07 Du Pont Synthesis and recovery of urea

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059760A1 (de) * 2006-12-18 2008-06-19 Skw Stickstoffwerke Piesteritz Gmbh Verfahren zur kontinuierlichen Herstellung von hochreiner Harnstofflösung
DE102006059760B4 (de) * 2006-12-18 2009-04-02 Skw Stickstoffwerke Piesteritz Gmbh Verfahren zur kontinuierlichen Herstellung von hochreiner Harnstofflösung
EP3199518A4 (en) * 2014-09-22 2018-03-28 Toyo Engineering Corporation Process for producing high-purity aqueous urea solution in urea production process
US10173972B2 (en) 2014-09-22 2019-01-08 Toyo Engineering Corporation Method for producing high-purity aqueous urea solution in urea production process

Also Published As

Publication number Publication date
NL145849B (nl) 1975-05-15
GR33978B (el) 1968-02-29
CS163163B2 (el) 1975-08-29
LU54171A1 (el) 1967-09-25
JPS5127659B1 (el) 1976-08-13
NL6710422A (el) 1968-01-29
BE701633A (el) 1968-01-02
SE387334B (sv) 1976-09-06
YU33783B (en) 1978-05-15
CH471089A (fr) 1969-04-15
ES343801A1 (es) 1968-09-16
BR6791527D0 (pt) 1973-06-28

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee