RO91348B - Procedeu pentru prepararea ureei - Google Patents

Procedeu pentru prepararea ureei

Info

Publication number
RO91348B
RO91348B RO116259A RO11625984A RO91348B RO 91348 B RO91348 B RO 91348B RO 116259 A RO116259 A RO 116259A RO 11625984 A RO11625984 A RO 11625984A RO 91348 B RO91348 B RO 91348B
Authority
RO
Romania
Prior art keywords
urea
solution
ammonia
concentrated
carbon dioxide
Prior art date
Application number
RO116259A
Other languages
English (en)
Other versions
RO91348A (ro
Inventor
Jonckers Kees
Original Assignee
Unie Van Kunstmestfabrieken B.V.
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 Unie Van Kunstmestfabrieken B.V. filed Critical Unie Van Kunstmestfabrieken B.V.
Publication of RO91348A publication Critical patent/RO91348A/ro
Publication of RO91348B publication Critical patent/RO91348B/ro

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
    • C07C273/04—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 from carbon dioxide and ammonia

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Saccharide Compounds (AREA)
  • Catalysts (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Compounds Of Unknown Constitution (AREA)

Abstract

Procedeul pentru prepararea ureei, conform inventiei, consta în aceea ca: într-o zona de sinteza, la o presiune de 125-350 at si la o temperatura corespunzatoare acestuia, se formeaza o solutie de sinteza ureei continînd carbamat si amoniac liber din bioxid de carbon si un exces de amoniac; într-o prima trapta de descompunere, la presiunea de sinteza sau mai scazuta, o parte din carbamat este descompusa prin intermediul caldurii si faza gazoasa de condensare; într-o trepta secunda de descompunere, la o presiune de 4-40 at se descompune înca o parte de carbamat înca prezent, uar faza gazoasa formata este separata; într-o alta trapta, carbamatul ramas este îndepartat sub forma unei mixturi gazoase, continând amoniac si bioxid de carbon, si aceasta mixtura gazoasa este prelucrata pentru a forma o solutie de amoniac si bioxid de carbon în apa; si solutia continând uree ramasa este prelucrata, pentru a forma o solutie concentrata de uree. Solutia de uree pentru concentrat este introdusa în tuburile unui schimbator de caldura cu carcasa, mixtura de gaz din treapta secunda de descompunere este condusa în partea de carcasa a schimbatorului de caldura la capatul opus locului unde ureea pentru concentrat este alimentata, solutia de amoniac si bioxid de carbon în apa este alimentata la partea de carcasa mentionata, la un loc plasat între intrarea pentru solutia de uree de concentrat si condensatul este descarcat din partea de carcasa la capatul unde solutia de uree este condusa în tuburi.
RO116259A 1983-11-13 1984-11-12 Procedeu pentru prepararea ureei RO91348B (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8303888A NL8303888A (nl) 1983-11-13 1983-11-13 Werkwijze voor de bereiding van ureum.

Publications (2)

Publication Number Publication Date
RO91348A RO91348A (ro) 1987-04-30
RO91348B true RO91348B (ro) 1987-05-01

Family

ID=19842703

Family Applications (1)

Application Number Title Priority Date Filing Date
RO116259A RO91348B (ro) 1983-11-13 1984-11-12 Procedeu pentru prepararea ureei

Country Status (32)

Country Link
US (1) US4801747A (ro)
EP (1) EP0145054B1 (ro)
JP (1) JPS60166656A (ro)
KR (1) KR870001143B1 (ro)
AT (1) ATE33132T1 (ro)
AU (1) AU569555B2 (ro)
BG (1) BG45699A3 (ro)
BR (1) BR8405765A (ro)
CS (1) CS249529B2 (ro)
DD (1) DD233124A5 (ro)
DE (1) DE3470038D1 (ro)
EG (1) EG16095A (ro)
ES (1) ES537569A0 (ro)
FI (1) FI844426L (ro)
GR (1) GR80927B (ro)
HU (1) HU199405B (ro)
IL (1) IL73489A (ro)
IN (1) IN162987B (ro)
MA (1) MA20262A1 (ro)
NL (1) NL8303888A (ro)
NO (1) NO161315C (ro)
NZ (1) NZ210148A (ro)
OA (1) OA07860A (ro)
PH (1) PH20867A (ro)
PL (1) PL141369B1 (ro)
PT (1) PT79483A (ro)
RO (1) RO91348B (ro)
SU (1) SU1450735A3 (ro)
TR (1) TR22384A (ro)
YU (1) YU188884A (ro)
ZA (1) ZA848715B (ro)
ZW (1) ZW17684A1 (ro)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8502227A (nl) * 1985-08-12 1987-03-02 Unie Van Kunstmestfab Bv Werkwijze voor de bereiding van ureum.
NL8602769A (nl) * 1986-11-03 1988-06-01 Stamicarbon Werkwijze voor het concentreren van een ureumoplossing en inrichting voor het uitvoeren van de werkwijze.
NL8602770A (nl) * 1986-11-03 1988-06-01 Stamicarbon Werkwijze voor de bereiding van ureum.
NL8800259A (nl) * 1988-02-04 1989-09-01 Stamicarbon Werkwijze voor het concentreren van een ureumoplossing.
CH679485A5 (ro) * 1989-12-29 1992-02-28 Ammonia Casale Sa
EP1289942B1 (en) * 2000-06-15 2008-05-07 Urea Casale S.A. Process and plant for the production of urea
JP4358428B2 (ja) * 2000-11-01 2009-11-04 東洋エンジニアリング株式会社 尿素製造方法
EP2153880A1 (en) * 2008-07-31 2010-02-17 Urea Casale S.A. Process and plant for the production of a urea solution for use in SCR process for reduction of Nox
US10919846B2 (en) * 2018-12-21 2021-02-16 Stamicarbon B.V. Urea production process and plant with heat integration in low pressure recovery section

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137725A (en) * 1960-02-11 1964-06-16 Chemical Construction Corp Heat recovery in urea synthesis process
US3147304A (en) * 1960-06-21 1964-09-01 Chemical Construction Corp Method for heat recovery in urea synthesis process
NL127236C (ro) * 1964-05-29
NL168506C (nl) * 1970-12-31 1982-04-16 Stamicarbon Werkwijze voor de bereiding van ureum.
AR206244A1 (es) * 1975-05-06 1976-07-07 Mitsui Toatsu Chemicals Procedimiento para tratar vapor de agua generado al concentrar una solucion acuosa de urea
JPS5268129A (en) * 1975-12-05 1977-06-06 Mitsui Toatsu Chem Inc Recovery of unreacted material and heat on urea synthesis
NL7612162A (nl) * 1976-11-03 1978-05-08 Unie Van Kunstmestfab Bv Werkwijze voor de bereiding van een ureum- oplossing uit nh3 en co2.
JPS5746954A (en) * 1980-09-05 1982-03-17 Mitsui Toatsu Chem Inc Synthesis of urea
JPS5750954A (en) * 1980-09-12 1982-03-25 Mitsui Toatsu Chem Inc Synthesis of urea
AU8825782A (en) * 1981-09-01 1983-03-28 Unie Van Kunstmestfabrieken B.V. Process for the preparation of urea
AU8825882A (en) * 1981-09-01 1983-03-28 Unie Van Kunstmestfabrieken B.V. Process for the preparation of urea
NL8201652A (nl) * 1982-04-21 1983-11-16 Unie Van Kunstmestfab Bv Werkwijze voor de bereiding van ureum.
NL8400839A (nl) * 1984-03-16 1985-10-16 Unie Van Kunstmestfab Bv Werkwijze voor de bereiding van ureum.

Also Published As

Publication number Publication date
ES8601114A1 (es) 1985-10-16
DD233124A5 (de) 1986-02-19
EP0145054A3 (en) 1985-07-03
IN162987B (ro) 1988-07-30
DE3470038D1 (en) 1988-04-28
CS249529B2 (en) 1987-03-12
PL141369B1 (en) 1987-07-31
ATE33132T1 (de) 1988-04-15
MA20262A1 (fr) 1985-07-01
PH20867A (en) 1987-05-25
IL73489A0 (en) 1985-02-28
RO91348A (ro) 1987-04-30
GR80927B (en) 1985-02-11
HU199405B (en) 1990-02-28
KR850004103A (ko) 1985-07-01
ES537569A0 (es) 1985-10-16
TR22384A (tr) 1987-03-01
JPS60166656A (ja) 1985-08-29
SU1450735A3 (ru) 1989-01-07
PT79483A (en) 1984-12-01
EP0145054A2 (en) 1985-06-19
NO844516L (no) 1985-05-14
FI844426A0 (fi) 1984-11-12
OA07860A (fr) 1986-11-20
BR8405765A (pt) 1985-09-17
AU569555B2 (en) 1988-02-04
NO161315C (no) 1989-08-02
ZW17684A1 (en) 1985-01-30
PL250403A1 (en) 1985-07-16
FI844426L (fi) 1985-05-14
ZA848715B (en) 1985-06-26
KR870001143B1 (ko) 1987-06-11
HUT35636A (en) 1985-07-29
EP0145054B1 (en) 1988-03-23
NL8303888A (nl) 1985-06-03
US4801747A (en) 1989-01-31
NO161315B (no) 1989-04-24
YU188884A (en) 1986-08-31
BG45699A3 (en) 1989-07-14
AU3531484A (en) 1985-05-23
EG16095A (en) 1988-01-31
IL73489A (en) 1988-03-31
NZ210148A (en) 1987-07-31

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