ATE100442T1 - Verfahren zur konzentrierung von harnstoffloesungen unter vakuum. - Google Patents

Verfahren zur konzentrierung von harnstoffloesungen unter vakuum.

Info

Publication number
ATE100442T1
ATE100442T1 AT91200917T AT91200917T ATE100442T1 AT E100442 T1 ATE100442 T1 AT E100442T1 AT 91200917 T AT91200917 T AT 91200917T AT 91200917 T AT91200917 T AT 91200917T AT E100442 T1 ATE100442 T1 AT E100442T1
Authority
AT
Austria
Prior art keywords
concentration
under vacuum
solutions under
urea solutions
urea
Prior art date
Application number
AT91200917T
Other languages
English (en)
Inventor
Franco Granelli
Original Assignee
Snam Progetti
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 Snam Progetti filed Critical Snam Progetti
Application granted granted Critical
Publication of ATE100442T1 publication Critical patent/ATE100442T1/de

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • B01D3/38—Steam distillation
    • 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
    • C07C273/14—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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S159/00—Concentrating evaporators
    • Y10S159/16—Vacuum
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S203/00—Distillation: processes, separatory
    • Y10S203/13—Spirits
AT91200917T 1990-04-24 1991-04-18 Verfahren zur konzentrierung von harnstoffloesungen unter vakuum. ATE100442T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20129A IT1240675B (it) 1990-04-24 1990-04-24 Procedimento per la concentrazione sotto vuoto di soluzioni di urea
EP91200917A EP0454227B1 (de) 1990-04-24 1991-04-18 Verfahren zur Konzentrierung von Harnstofflösungen unter Vakuum

Publications (1)

Publication Number Publication Date
ATE100442T1 true ATE100442T1 (de) 1994-02-15

Family

ID=11164044

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91200917T ATE100442T1 (de) 1990-04-24 1991-04-18 Verfahren zur konzentrierung von harnstoffloesungen unter vakuum.

Country Status (14)

Country Link
US (2) US5273623A (de)
EP (1) EP0454227B1 (de)
CN (1) CN1043039C (de)
AR (1) AR246921A1 (de)
AT (1) ATE100442T1 (de)
BG (1) BG60583B1 (de)
CA (1) CA2040525C (de)
DE (1) DE69101022T2 (de)
ES (1) ES2047978T3 (de)
IT (1) IT1240675B (de)
MX (1) MX173474B (de)
PL (1) PL164999B1 (de)
RU (1) RU1833373C (de)
SA (1) SA91110363B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE134994T1 (de) 1990-10-05 1996-03-15 Urea Casale Sa Verfahren zur herstellung von harnstoff mit unterschiedlichen leistungen sowie die implementierung in existierenden anlagen
US20040255379A1 (en) * 2002-03-29 2004-12-23 Yu Zheng Inflatable apparatus
AT501763B1 (de) * 2005-05-13 2006-11-15 Arc Seibersdorf Res Gmbh Verfahren zur ermittlung von helligkeitswerten
US7370379B2 (en) * 2005-09-07 2008-05-13 Patent Category Corp. Foldable inflatable furniture
US8202480B2 (en) * 2009-06-25 2012-06-19 Uop Llc Apparatus for separating pitch from slurry hydrocracked vacuum gas oil
US8540870B2 (en) * 2009-06-25 2013-09-24 Uop Llc Process for separating pitch from slurry hydrocracked vacuum gas oil
US8231775B2 (en) 2009-06-25 2012-07-31 Uop Llc Pitch composition
CN103037946B (zh) * 2010-07-29 2015-07-22 田边工业株式会社 减压喷雾干燥方法及减压喷雾干燥装置
CN103191878B (zh) * 2012-01-10 2015-11-25 内蒙古鄂尔多斯联合化工有限公司 尿素生产系统中二段蒸发分离器的冲洗装置及方法
US9150470B2 (en) 2012-02-02 2015-10-06 Uop Llc Process for contacting one or more contaminated hydrocarbons
UA123548C2 (uk) * 2016-05-03 2021-04-21 Стамікарбон Б.В. Виробництво карбаміду з контрольованим біуретом

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA681148A (en) * 1964-03-03 J. B. Biekart Hendrik Process of concentrating urea solutions to a practically water-free melt
US2702949A (en) * 1952-03-07 1955-03-01 Research Corp Apparatus for drying
US2933526A (en) * 1956-02-25 1960-04-19 Lonza Electric & Chem Works Process for the manufacture of urea in granular form
US2961464A (en) * 1956-12-15 1960-11-22 Stamicarbon Urea concentration process
GB926781A (en) * 1959-06-02 1963-05-22 Vulcan Cincinnati Inc Dehydration of urea melts
DE1248639B (de) * 1959-07-03
US3147174A (en) * 1959-10-14 1964-09-01 Chemical Construction Corp Low moisture urea melt
US3130225A (en) * 1962-02-12 1964-04-21 Pullman Inc Urea production
US3348599A (en) * 1964-04-03 1967-10-24 Scientism Lab Apparatus for dewatering and dehydrating slimes and the like
US3223145A (en) * 1964-05-20 1965-12-14 Allied Chem Evaporative concentration of aqueous urea
NL141179B (nl) * 1967-01-20 1974-02-15 Whitlock Mfg Co Werkwijze en inrichting voor de bereiding van ureum.
US4069253A (en) * 1970-07-01 1978-01-17 Mitsui Toatsu Chemicals, Incorporated Process for the production of water-free molten urea
US3930931A (en) * 1973-03-26 1976-01-06 The General Tire & Rubber Company Apparatus and method for stripping styrene from an aqueous dispersion of styrene-butadiene polymer latex
US3985538A (en) * 1974-10-24 1976-10-12 Tennessee Valley Authority Pipe reactor-continuous ammoniator process for production of granular phosphates
GB1581761A (en) * 1977-06-09 1980-12-17 Azote Sa Cie Neerlandaise Urea granulation
FR2410870A1 (fr) * 1977-11-30 1979-06-29 Kernforschungsanlage Juelich Procede et installation pour traiter des solutions residuaires contenant du nitrate d'ammonium de la technique nucleaire
US4231839A (en) * 1979-01-30 1980-11-04 Cf Industries, Inc. After-treatment processes and apparatus, especially for urea and ammonium nitrate plants
CA1160593A (en) * 1981-04-14 1984-01-17 Hydro-Quebec Spray drying with a plasma of superheated steam
NL8201652A (nl) * 1982-04-21 1983-11-16 Unie Van Kunstmestfab Bv Werkwijze voor de bereiding van ureum.
US5232550A (en) * 1987-04-27 1993-08-03 Ohkawara Kakohki Co., Ltd. Vacuum drying method
SU1490111A1 (ru) * 1987-05-08 1989-06-30 Белорусский технологический институт им.С.М.Кирова Способ выпаривани водных растворов мочевины и выпарной аппарат дл его осуществлени
DE3825856A1 (de) * 1988-07-29 1990-02-01 Karlsruhe Wiederaufarbeit Verfahren zum zufuehren von gas in eine salzhaltige loesung

Also Published As

Publication number Publication date
IT9020129A0 (it) 1990-04-24
EP0454227B1 (de) 1994-01-19
PL290012A1 (en) 1992-01-13
MX173474B (es) 1994-03-07
IT1240675B (it) 1993-12-17
BG60583B1 (bg) 1995-09-29
SA91110363B1 (ar) 2002-05-18
IT9020129A1 (it) 1991-10-24
EP0454227A1 (de) 1991-10-30
RU1833373C (ru) 1993-08-07
CN1043039C (zh) 1999-04-21
US5736003A (en) 1998-04-07
CA2040525C (en) 2002-06-04
AR246921A1 (es) 1994-10-31
DE69101022D1 (de) 1994-03-03
US5273623A (en) 1993-12-28
CA2040525A1 (en) 1991-10-25
PL164999B1 (pl) 1994-10-31
DE69101022T2 (de) 1994-05-19
CN1057453A (zh) 1992-01-01
ES2047978T3 (es) 1994-03-01

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EELA Cancelled due to lapse of time