KR850000700B1 - Urea production method - Google Patents

Urea production method

Info

Publication number
KR850000700B1
KR850000700B1 KR8103130A KR810003130A KR850000700B1 KR 850000700 B1 KR850000700 B1 KR 850000700B1 KR 8103130 A KR8103130 A KR 8103130A KR 810003130 A KR810003130 A KR 810003130A KR 850000700 B1 KR850000700 B1 KR 850000700B1
Authority
KR
South Korea
Prior art keywords
pressure
production method
urea
ammonia
bars
Prior art date
Application number
KR8103130A
Other languages
Korean (ko)
Other versions
KR830006192A (en
Inventor
Vincenzo Lagana
Virginio Cavallant
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 KR830006192A publication Critical patent/KR830006192A/en
Application granted granted Critical
Publication of KR850000700B1 publication Critical patent/KR850000700B1/en

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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Abstract

A process for the production of urea comprises synthesizing a urea soln. from ammonia and carbon dioxide (the mole ratio is 5:1-8:1) and decomposing the ammonium carbamate contained in the urea soln. in two stages. In the first decomposition stage, ammonia is used as a self- stripping agent at a pressure of 180 to 250 bars, which is the same or substantially the same as in the synthesis. In the second decomposition, carbon dioxide is used as an external stripping agent and the pressure is 30 to 50 bars, less than the pressure at which the first decomposition stage was carried out.
KR8103130A 1980-08-29 1981-08-27 Urea production method KR850000700B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT24357/80A IT1141030B (en) 1980-08-29 1980-08-29 PROCEDURE FOR THE PRODUCTION OF UREA

Publications (2)

Publication Number Publication Date
KR830006192A KR830006192A (en) 1983-09-20
KR850000700B1 true KR850000700B1 (en) 1985-05-15

Family

ID=11213241

Family Applications (1)

Application Number Title Priority Date Filing Date
KR8103130A KR850000700B1 (en) 1980-08-29 1981-08-27 Urea production method

Country Status (35)

Country Link
JP (1) JPS5772955A (en)
KR (1) KR850000700B1 (en)
AR (1) AR226915A1 (en)
AT (1) AT377253B (en)
AU (1) AU544041B2 (en)
BE (1) BE890118A (en)
BR (1) BR8105217A (en)
CA (1) CA1182838A (en)
CS (1) CS228529B2 (en)
DD (1) DD201780A5 (en)
DE (1) DE3133765C2 (en)
DK (1) DK343381A (en)
EG (1) EG15405A (en)
ES (1) ES505481A0 (en)
FR (1) FR2489323A1 (en)
GB (1) GB2087381B (en)
IL (1) IL63560A (en)
IN (1) IN153584B (en)
IT (1) IT1141030B (en)
LU (1) LU83591A1 (en)
MW (1) MW3181A1 (en)
MX (1) MX152570A (en)
MY (1) MY8500910A (en)
NL (1) NL8104011A (en)
NO (1) NO151199C (en)
PH (1) PH18034A (en)
PL (1) PL132177B1 (en)
PT (1) PT73594B (en)
RO (1) RO82682B (en)
SE (1) SE447652B (en)
TR (1) TR21103A (en)
YU (1) YU194681A (en)
ZA (1) ZA815329B (en)
ZM (1) ZM7381A1 (en)
ZW (1) ZW18981A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1211125B (en) * 1981-10-16 1989-09-29 Ortu Francesco NITROGEN COMPOUNDS. PROCESS FOR THE PREPARATION OF
EP0096151B1 (en) * 1982-06-03 1986-07-23 Montedison S.p.A. Method for avoiding the corrosion of strippers in urea manufacturing plants
NL8400840A (en) * 1984-03-16 1985-10-16 Unie Van Kunstmestfab Bv METHOD FOR THE PREPARATION OF UREA.
IT1209532B (en) * 1984-04-20 1989-08-30 Snam Progetti PROCESS FOR THE SYNTHESIS OF UREA AND MATERIAL USED IN ITSELF.
IT1245396B (en) * 1991-03-22 1994-09-20 Snam Progetti PROCEDURE FOR THE PRODUCTION OF HIGH ENERGY EFFICIENCY UREA
US8906187B2 (en) 2008-06-25 2014-12-09 Colgate-Palmolive Company Method of making shoulder/nozzles with film barrier liners
ITMI20120013A1 (en) 2012-01-09 2013-07-10 Saipem Spa PROCEDURE FOR THE SYNTHESIS OF UREA INCLUDING A STRIPPER FUND OF PASSIVATION

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL250349A (en) * 1960-04-08
US4053508A (en) * 1960-09-05 1977-10-11 Stamicarbon, N.V. Process and installation for preparing urea from ammonia and carbon dioxide
CH498811A (en) * 1967-05-22 1970-11-15 Chemical Construction Corp Process for the production of urea from ammonia and carbon dioxide
BE757274A (en) * 1969-10-16 1971-03-16 Snam Progetti UREA PRODUCTION PROCESS
US3922222A (en) * 1973-02-20 1975-11-25 Cf Ind Method for treatment of urea crystallizer condensate
IT1068268B (en) * 1976-09-09 1985-03-21 Snam Progetti PROCEDURE FOR THE PRODUCTION OF UREA AND PURIFICATION OF WATERS
SE446978B (en) * 1977-05-05 1986-10-20 Montedison Spa ISOBARIC DOUBLE CIRCULATOR PROCEDURE FOR SYNTHETIZATION OF UREA DURING INTERMEDIATE PRODUCTION OF AMMONIUM CARBAMATE

Also Published As

Publication number Publication date
IL63560A (en) 1985-09-29
ZA815329B (en) 1982-07-28
EG15405A (en) 1986-06-30
NO151199B (en) 1984-11-19
CS228529B2 (en) 1984-05-14
ES8301902A1 (en) 1983-01-16
IL63560A0 (en) 1981-11-30
PL232761A1 (en) 1982-03-01
SE447652B (en) 1986-12-01
NL8104011A (en) 1982-03-16
DE3133765A1 (en) 1982-04-01
RO82682B (en) 1984-01-30
BE890118A (en) 1982-03-01
SE8105105L (en) 1982-03-01
YU194681A (en) 1983-02-28
IN153584B (en) 1984-07-28
PL132177B1 (en) 1985-02-28
DE3133765C2 (en) 1983-05-19
AU7390481A (en) 1982-03-04
ES505481A0 (en) 1983-01-16
PT73594B (en) 1982-11-10
FR2489323A1 (en) 1982-03-05
JPS5772955A (en) 1982-05-07
AR226915A1 (en) 1982-08-31
NO812855L (en) 1982-03-01
NO151199C (en) 1985-02-27
KR830006192A (en) 1983-09-20
DK343381A (en) 1982-03-01
MY8500910A (en) 1985-12-31
LU83591A1 (en) 1982-04-14
MX152570A (en) 1985-08-30
PT73594A (en) 1981-09-01
AU544041B2 (en) 1985-05-16
AT377253B (en) 1985-02-25
GB2087381A (en) 1982-05-26
ZM7381A1 (en) 1981-12-21
IT8024357A0 (en) 1980-08-29
ZW18981A1 (en) 1981-10-28
DD201780A5 (en) 1983-08-10
PH18034A (en) 1985-03-06
TR21103A (en) 1983-07-01
CA1182838A (en) 1985-02-19
MW3181A1 (en) 1982-09-08
ATA354881A (en) 1984-07-15
FR2489323B1 (en) 1984-02-10
BR8105217A (en) 1982-04-27
IT1141030B (en) 1986-10-01
GB2087381B (en) 1984-08-22
RO82682A (en) 1984-01-14

Similar Documents

Publication Publication Date Title
ATE220392T1 (en) METHOD FOR PRODUCING UREA
DE69704949T2 (en) METHOD FOR PRODUCING UREA
AU579614B2 (en) Process for the preparation of urea
ES8107126A1 (en) Process for purifying urea-containing waste water and process for preparing melamine.
IL134875A (en) Method for producing triazolinethione derivatives
GB1520561A (en) Flexible integrated method for the production of ammonila and urea
KR850000700B1 (en) Urea production method
GB1207923A (en) Process for urea production in combination with ammonia synthesis
IE37788L (en) Process for preparing urea
BG105099A (en) Process for the preparation of urea
ATE319656T1 (en) COMPOSITION CONTAINING AT LEAST SODIUM BICARBONATE, METHOD FOR THE PRODUCTION THEREOF AND USES THEREOF
ATA507479A (en) Two=stage thermal treatment of urea soln. - from synthesis reactor, removing most ammonia in first stage, and decomposing carbamate in second (NL 28.1.80)
ES2130694T3 (en) TREATMENT OF A CHEMICAL PRODUCT.
ATE86975T1 (en) PROCESS FOR INCREASED UREA PRODUCTION.
GB1188051A (en) Process for Producing Urea
IE33879B1 (en) Improvements in or relating to the production of urea
SE9303273L (en) Process and apparatus for producing chloric acid
HK1027560A1 (en) Method for producing 1,3-disubstituted 2-nitroguanidines
GB1207924A (en) Process of preparing urea
HUT64739A (en) Method for producing isocyanic acid by decomposition of n,n-disubstituted ureas
EP0136765A3 (en) Process for the preparation of urea
DE69902680D1 (en) METHOD FOR PRODUCING HYDRAZINE

Legal Events

Date Code Title Description
G160 Decision to publish patent application