JPS55145659A - Concentration of aqueous solution of urea - Google Patents

Concentration of aqueous solution of urea

Info

Publication number
JPS55145659A
JPS55145659A JP5251979A JP5251979A JPS55145659A JP S55145659 A JPS55145659 A JP S55145659A JP 5251979 A JP5251979 A JP 5251979A JP 5251979 A JP5251979 A JP 5251979A JP S55145659 A JPS55145659 A JP S55145659A
Authority
JP
Japan
Prior art keywords
urea
gas stream
hot gas
concentration
aqueous solution
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.)
Pending
Application number
JP5251979A
Other languages
English (en)
Japanese (ja)
Inventor
Michio Nobue
Akito Fukui
Yoshio Yamamoto
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.)
Mitsui Toatsu Chemicals Inc
Toyo Engineering Corp
Original Assignee
Mitsui Toatsu Chemicals Inc
Toyo Engineering Corp
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 Mitsui Toatsu Chemicals Inc, Toyo Engineering Corp filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP5251979A priority Critical patent/JPS55145659A/ja
Priority to GB8039154A priority patent/GB2061948B/en
Priority to PCT/JP1980/000088 priority patent/WO1980002425A1/ja
Priority to BR8007228A priority patent/BR8007228A/pt
Priority to IN565/CAL/80A priority patent/IN152760B/en
Publication of JPS55145659A publication Critical patent/JPS55145659A/ja
Pending legal-status Critical Current

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
    • C07C273/02—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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
JP5251979A 1979-05-01 1979-05-01 Concentration of aqueous solution of urea Pending JPS55145659A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP5251979A JPS55145659A (en) 1979-05-01 1979-05-01 Concentration of aqueous solution of urea
GB8039154A GB2061948B (en) 1979-05-01 1980-04-25 Process for concentrating aqueous urea solution
PCT/JP1980/000088 WO1980002425A1 (fr) 1979-05-01 1980-04-25 Procede de concentration d'une solution aqueuse d'uree
BR8007228A BR8007228A (pt) 1979-05-01 1980-04-25 Processo para concentracao de solucao aquosa de ureia
IN565/CAL/80A IN152760B (OSRAM) 1979-05-01 1980-05-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5251979A JPS55145659A (en) 1979-05-01 1979-05-01 Concentration of aqueous solution of urea

Publications (1)

Publication Number Publication Date
JPS55145659A true JPS55145659A (en) 1980-11-13

Family

ID=12916980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5251979A Pending JPS55145659A (en) 1979-05-01 1979-05-01 Concentration of aqueous solution of urea

Country Status (4)

Country Link
JP (1) JPS55145659A (OSRAM)
GB (1) GB2061948B (OSRAM)
IN (1) IN152760B (OSRAM)
WO (1) WO1980002425A1 (OSRAM)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH679485A5 (OSRAM) * 1989-12-29 1992-02-28 Ammonia Casale Sa

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497141A (OSRAM) * 1972-05-13 1974-01-22

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL141179B (nl) * 1967-01-20 1974-02-15 Whitlock Mfg Co Werkwijze en inrichting voor de bereiding van ureum.
GB1235055A (en) * 1967-01-20 1971-06-09 Whitlock Mfg Company Process for drying urea solutions
JPS51101919A (ja) * 1975-03-07 1976-09-08 Toyo Engineering Corp Nyososuiyoekinonoshukuhoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497141A (OSRAM) * 1972-05-13 1974-01-22

Also Published As

Publication number Publication date
IN152760B (OSRAM) 1984-03-31
GB2061948B (en) 1983-08-24
WO1980002425A1 (fr) 1980-11-13
GB2061948A (en) 1981-05-20

Similar Documents

Publication Publication Date Title
DE3475342D1 (en) Energy-efficient evaporation process with means for vapor recovery
JPS5268129A (en) Recovery of unreacted material and heat on urea synthesis
DE3264988D1 (en) Process for the removal of urea, ammonia and carbon dioxide from dilute aqueous solutions
GB1526245A (en) Manufacture of concentrated aqueous solutions of formaldehyde
GB557689A (en) Concentration of hygroscopic solutions
ES8200331A1 (es) Procedimiento y aparato perfeccionados de postratamiento para plantas de sintesis de amonio o urea.
JPS55145659A (en) Concentration of aqueous solution of urea
GB1011603A (en) Art of removing scale in multiple unit evaporator systems
EP0149413A3 (en) Method and apparatus for refrigeration
GB1474465A (en) Method of recovering sulphur dioxide
CA1044257A (en) Treatment of water vapor generated in concentrating an aqueous urea solution
JPS54156999A (en) Device for processing radioactive gaseous wastes
AU577272B2 (en) Production of ammonium nitrate
RU2127224C1 (ru) Способ производства азотной кислоты
JPS61256917A (ja) 粉粒体硫安の製造方法
RO84858B (ro) Procedeu pentru concentrarea solutiilor apoase de glicoli
JPS5845701A (ja) 自己蒸気再利用濃縮方法
JPS63104603A (ja) 吸湿性化合物水溶液の濃縮方法
RU94001093A (ru) Способ концентрирования растворов, содержащих сульфат натрия
KR840003783A (ko) 가용성 커피의 제조방법
SU546352A1 (ru) Способ концентрировани водных экстрактов лекарственных вещест
SU621341A1 (ru) Способ увеличени объема табака
US4317807A (en) Air cooling during the production of phosphoric acid
GB819030A (en) Process for concentrating urea solutions
SU627111A2 (ru) Способ приготовлени органического удобрени и корма из птичьего помета