IT1256666B - Procedimento per la purificazione di n-alchil urea di grado tecnico. - Google Patents

Procedimento per la purificazione di n-alchil urea di grado tecnico.

Info

Publication number
IT1256666B
IT1256666B ITTO920022A ITTO920022A IT1256666B IT 1256666 B IT1256666 B IT 1256666B IT TO920022 A ITTO920022 A IT TO920022A IT TO920022 A ITTO920022 A IT TO920022A IT 1256666 B IT1256666 B IT 1256666B
Authority
IT
Italy
Prior art keywords
urea
alchil
purifying
alkyl urea
alcoholic solvent
Prior art date
Application number
ITTO920022A
Other languages
English (en)
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 filed Critical
Priority to ITTO920022A priority Critical patent/IT1256666B/it
Publication of ITTO920022A0 publication Critical patent/ITTO920022A0/it
Priority to US07/996,614 priority patent/US5446200A/en
Priority to ES93100264T priority patent/ES2082525T3/es
Priority to EP93100264A priority patent/EP0552626B1/en
Priority to DE69301032T priority patent/DE69301032T2/de
Priority to AT93100264T priority patent/ATE131808T1/de
Publication of ITTO920022A1 publication Critical patent/ITTO920022A1/it
Application granted granted Critical
Publication of IT1256666B publication Critical patent/IT1256666B/it

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
    • C07C273/189—Purification, separation, stabilisation, use of additives

Landscapes

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

Abstract

Procedimento per la purificazione di N-alchil urea di grado tecnico, particolarmente mono-etilurea, comprendente solfato di metallo alcalino, caratterizzato dal fatto che comprende le fasi di:- trattare l'alchil urea tecnica con un solvente alcolico C1-C4 per causare la solubilizzazione selettiva dell'alchil urea,- separare la frazione solubile dal solfato di metallo alcalino insolubile nel solvente alcolico, e - rimuovere il solvente alcolico dalla frazione solubile per recuperare la N-alchil urea.
ITTO920022A 1992-01-15 1992-01-15 Procedimento per la purificazione di n-alchil urea di grado tecnico. IT1256666B (it)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ITTO920022A IT1256666B (it) 1992-01-15 1992-01-15 Procedimento per la purificazione di n-alchil urea di grado tecnico.
US07/996,614 US5446200A (en) 1992-01-15 1992-12-24 Process for the purification of technical-grade N-alkyl urea
ES93100264T ES2082525T3 (es) 1992-01-15 1993-01-11 Procedimiento para la purificacion de derivados de n-alquilo de urea.
EP93100264A EP0552626B1 (en) 1992-01-15 1993-01-11 Process for the purification of technical-grade n-alkyl urea
DE69301032T DE69301032T2 (de) 1992-01-15 1993-01-11 Verfahren zur Reinigung von technischem N-Alkyl-Harnstoff
AT93100264T ATE131808T1 (de) 1992-01-15 1993-01-11 Verfahren zur reinigung von technischem n-alkyl- harnstoff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO920022A IT1256666B (it) 1992-01-15 1992-01-15 Procedimento per la purificazione di n-alchil urea di grado tecnico.

Publications (3)

Publication Number Publication Date
ITTO920022A0 ITTO920022A0 (it) 1992-01-15
ITTO920022A1 ITTO920022A1 (it) 1993-07-15
IT1256666B true IT1256666B (it) 1995-12-12

Family

ID=11409887

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO920022A IT1256666B (it) 1992-01-15 1992-01-15 Procedimento per la purificazione di n-alchil urea di grado tecnico.

Country Status (6)

Country Link
US (1) US5446200A (it)
EP (1) EP0552626B1 (it)
AT (1) ATE131808T1 (it)
DE (1) DE69301032T2 (it)
ES (1) ES2082525T3 (it)
IT (1) IT1256666B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919482C2 (de) * 1999-04-29 2001-04-26 Byk Chemie Gmbh Verfahren zur Herstellung eines Thixotropie-Mittels und dessen Verwendung
US7720908B1 (en) * 2000-03-07 2010-05-18 Microsoft Corporation System and method for multi-layered network communications
PL3131962T3 (pl) 2014-04-15 2018-09-28 Byk-Chemie Gmbh Kompozycja do regulowania właściwości reologicznych

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673859A (en) * 1950-09-15 1954-03-30 Allied Chem & Dye Corp Production of urea derivatives
US3297753A (en) * 1965-06-30 1967-01-10 Atlas Chem Ind Separation of alkyl ureas

Also Published As

Publication number Publication date
DE69301032T2 (de) 1996-05-02
DE69301032D1 (de) 1996-02-01
ES2082525T3 (es) 1996-03-16
EP0552626B1 (en) 1995-12-20
EP0552626A1 (en) 1993-07-28
US5446200A (en) 1995-08-29
ITTO920022A0 (it) 1992-01-15
ATE131808T1 (de) 1996-01-15
ITTO920022A1 (it) 1993-07-15

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19990129