BG94302A - Метод за концентриране на разтвори на карбамид във вакуум - Google Patents

Метод за концентриране на разтвори на карбамид във вакуум

Info

Publication number
BG94302A
BG94302A BG094302A BG9430291A BG94302A BG 94302 A BG94302 A BG 94302A BG 094302 A BG094302 A BG 094302A BG 9430291 A BG9430291 A BG 9430291A BG 94302 A BG94302 A BG 94302A
Authority
BG
Bulgaria
Prior art keywords
vacuum
concentration
urea solutions
urea
concentrator
Prior art date
Application number
BG094302A
Other languages
English (en)
Other versions
BG60583B1 (bg
Inventor
Franco Granelli
Original Assignee
Snamprogetti S.P.A.
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 S.P.A. filed Critical Snamprogetti S.P.A.
Publication of BG94302A publication Critical patent/BG94302A/bg
Publication of BG60583B1 publication Critical patent/BG60583B1/bg

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)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

Съгласно метода последният етап на изпарението във вакуум се провежда с помощта на впръскване на прегрята водна пара в горната част на апарата за концентриране, за да се предотврати образуването и отлагането на високотопящи замърсяващи съединения, производни на карбамида. 4 претенции, 1 фигура
BG94302A 1990-04-24 1991-04-23 Метод за концентриране на разтвори на карбамид във вакуум BG60583B1 (bg)

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 (2)

Publication Number Publication Date
BG94302A true BG94302A (bg) 1993-12-24
BG60583B1 BG60583B1 (bg) 1995-09-29

Family

ID=11164044

Family Applications (1)

Application Number Title Priority Date Filing Date
BG94302A BG60583B1 (bg) 1990-04-24 1991-04-23 Метод за концентриране на разтвори на карбамид във вакуум

Country Status (14)

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

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
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
US8202480B2 (en) * 2009-06-25 2012-06-19 Uop Llc Apparatus for separating pitch from slurry hydrocracked vacuum gas oil
JP5982283B2 (ja) * 2010-07-29 2016-08-31 田辺工業株式会社 減圧噴霧乾燥方法及び減圧噴霧乾燥装置
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
LT3452212T (lt) 2016-05-03 2020-04-10 Stamicarbon B.V. Karbamido gamyba su kontroliuojamu biuretu

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 (bg) * 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
CA2040525C (en) 2002-06-04
CN1057453A (zh) 1992-01-01
EP0454227A1 (en) 1991-10-30
MX173474B (es) 1994-03-07
DE69101022D1 (de) 1994-03-03
RU1833373C (ru) 1993-08-07
US5736003A (en) 1998-04-07
US5273623A (en) 1993-12-28
ATE100442T1 (de) 1994-02-15
IT9020129A1 (it) 1991-10-24
ES2047978T3 (es) 1994-03-01
IT9020129A0 (it) 1990-04-24
PL290012A1 (en) 1992-01-13
EP0454227B1 (en) 1994-01-19
DE69101022T2 (de) 1994-05-19
SA91110363B1 (ar) 2002-05-18
IT1240675B (it) 1993-12-17
CA2040525A1 (en) 1991-10-25
PL164999B1 (pl) 1994-10-31
BG60583B1 (bg) 1995-09-29
AR246921A1 (es) 1994-10-31
CN1043039C (zh) 1999-04-21

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