IT1240675B - Procedimento per la concentrazione sotto vuoto di soluzioni di urea - Google Patents

Procedimento per la concentrazione sotto vuoto di soluzioni di urea

Info

Publication number
IT1240675B
IT1240675B IT20129A IT2012990A IT1240675B IT 1240675 B IT1240675 B IT 1240675B IT 20129 A IT20129 A IT 20129A IT 2012990 A IT2012990 A IT 2012990A IT 1240675 B IT1240675 B IT 1240675B
Authority
IT
Italy
Prior art keywords
procedure
vacuum concentration
urea solutions
urea
solutions
Prior art date
Application number
IT20129A
Other languages
English (en)
Other versions
IT9020129A0 (it
IT9020129A1 (it
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
Publication of IT9020129A0 publication Critical patent/IT9020129A0/it
Priority to IT20129A priority Critical patent/IT1240675B/it
Priority to CA002040525A priority patent/CA2040525C/en
Priority to EP91200917A priority patent/EP0454227B1/en
Priority to ES91200917T priority patent/ES2047978T3/es
Priority to US07/687,116 priority patent/US5273623A/en
Priority to AT91200917T priority patent/ATE100442T1/de
Priority to DE69101022T priority patent/DE69101022T2/de
Priority to MX025486A priority patent/MX173474B/es
Priority to SU914895239A priority patent/RU1833373C/ru
Priority to BG94302A priority patent/BG60583B1/bg
Priority to AR91319509A priority patent/AR246921A1/es
Priority to PL91290012A priority patent/PL164999B1/pl
Priority to CN91103239A priority patent/CN1043039C/zh
Priority to SA91110363A priority patent/SA91110363B1/ar
Publication of IT9020129A1 publication Critical patent/IT9020129A1/it
Application granted granted Critical
Publication of IT1240675B publication Critical patent/IT1240675B/it
Priority to US08/513,251 priority patent/US5736003A/en

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fertilizers (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
IT20129A 1990-04-24 1990-04-24 Procedimento per la concentrazione sotto vuoto di soluzioni di urea IT1240675B (it)

Priority Applications (15)

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
CA002040525A CA2040525C (en) 1990-04-24 1991-04-16 Process for concentrating urea solutions under vacuum
EP91200917A EP0454227B1 (en) 1990-04-24 1991-04-18 Process for concentrating urea solutions under vacuum
ES91200917T ES2047978T3 (es) 1990-04-24 1991-04-18 Procedimiento para la concentracion de disoluciones de urea bajo vacio.
US07/687,116 US5273623A (en) 1990-04-24 1991-04-18 Process for concentrating urea solution under vacuum
AT91200917T ATE100442T1 (de) 1990-04-24 1991-04-18 Verfahren zur konzentrierung von harnstoffloesungen unter vakuum.
DE69101022T DE69101022T2 (de) 1990-04-24 1991-04-18 Verfahren zur Konzentrierung von Harnstofflösungen unter Vakuum.
SU914895239A RU1833373C (ru) 1990-04-24 1991-04-23 Cпocoб kohцehtpиpobahия pactbopob moчebиhы b bakууme
MX025486A MX173474B (es) 1990-04-24 1991-04-23 Procedimiento para la concentracion bajo vacio de una solucion de urea
BG94302A BG60583B1 (bg) 1990-04-24 1991-04-23 Метод за концентриране на разтвори на карбамид във вакуум
AR91319509A AR246921A1 (es) 1990-04-24 1991-04-23 Procedimiento para la concentracion bajo vacio de soluciones de urea
PL91290012A PL164999B1 (pl) 1990-04-24 1991-04-24 Sposób zatezania roztworów mocznika PL
CN91103239A CN1043039C (zh) 1990-04-24 1991-04-24 在真空条件下浓缩尿素溶液的方法
SA91110363A SA91110363B1 (ar) 1990-04-24 1991-05-27 عملية لتركيز محاليل البولة (اليوريا) تحت التفريغ
US08/513,251 US5736003A (en) 1990-04-24 1995-08-10 Apparatus for concentrating urea solutions under vacuum

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
IT9020129A0 IT9020129A0 (it) 1990-04-24
IT9020129A1 IT9020129A1 (it) 1991-10-24
IT1240675B true IT1240675B (it) 1993-12-17

Family

ID=11164044

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20129A IT1240675B (it) 1990-04-24 1990-04-24 Procedimento per la concentrazione sotto vuoto di soluzioni di urea

Country Status (14)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT3607B (en) 1990-10-05 1995-12-27 Urea Casale Sa Process for the production of urea by steps and implementation also on existing plants

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2183978C1 (ru) * 2001-04-25 2002-06-27 Малышев Роман Михайлович Способ выпаривания жидких смесей и устройство для его осуществления
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
US8231775B2 (en) 2009-06-25 2012-07-31 Uop Llc Pitch composition
US8540870B2 (en) * 2009-06-25 2013-09-24 Uop Llc Process for separating pitch from slurry hydrocracked vacuum gas oil
US8202480B2 (en) * 2009-06-25 2012-06-19 Uop Llc Apparatus for separating pitch from slurry hydrocracked vacuum gas oil
US8966783B2 (en) * 2010-07-29 2015-03-03 Tanabe Engineering Corporation Vacuum-pressure spray-drying method and vacuum-pressure spray-drying device
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
IT202000010990A1 (it) * 2020-05-14 2021-11-14 Eurotecnica Melamine Ag Metodo di lavaggio di un separatore per urea fusa e relativo apparato separatore

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 (it) * 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
US4376010A (en) * 1981-04-14 1983-03-08 Noranda Mines Limited 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT3607B (en) 1990-10-05 1995-12-27 Urea Casale Sa Process for the production of urea by steps and implementation also on existing plants

Also Published As

Publication number Publication date
US5273623A (en) 1993-12-28
PL164999B1 (pl) 1994-10-31
PL290012A1 (en) 1992-01-13
ATE100442T1 (de) 1994-02-15
SA91110363B1 (ar) 2002-05-18
CN1043039C (zh) 1999-04-21
IT9020129A0 (it) 1990-04-24
AR246921A1 (es) 1994-10-31
MX173474B (es) 1994-03-07
CA2040525C (en) 2002-06-04
IT9020129A1 (it) 1991-10-24
CN1057453A (zh) 1992-01-01
US5736003A (en) 1998-04-07
BG60583B1 (bg) 1995-09-29
EP0454227A1 (en) 1991-10-30
DE69101022D1 (de) 1994-03-03
DE69101022T2 (de) 1994-05-19
RU1833373C (ru) 1993-08-07
CA2040525A1 (en) 1991-10-25
BG94302A (bg) 1993-12-24
EP0454227B1 (en) 1994-01-19
ES2047978T3 (es) 1994-03-01

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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: 19970415