ES361420A1 - Urea prodn from ammonia and carbon dioxide - Google Patents

Urea prodn from ammonia and carbon dioxide

Info

Publication number
ES361420A1
ES361420A1 ES361420A ES361420A ES361420A1 ES 361420 A1 ES361420 A1 ES 361420A1 ES 361420 A ES361420 A ES 361420A ES 361420 A ES361420 A ES 361420A ES 361420 A1 ES361420 A1 ES 361420A1
Authority
ES
Spain
Prior art keywords
urea
reactor
prodn
ammonia
carbon dioxide
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.)
Expired
Application number
ES361420A
Other languages
Spanish (es)
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
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 Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of ES361420A1 publication Critical patent/ES361420A1/en
Expired 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
    • C07C273/04—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)

Abstract

Synthesis of urea from NH3 and CO2 at 200-350 atm./160-230 deg.C., in which the unconverted material is recycled to the reactor as an aqs. soln., whereby the effluent from the reactor, which is an aqs. soln. of urea, ammonium carbamate and possibly NH3, is contacted with gaseous mist. of H2, N2 and 14% CO2, by which the ammonium carbamate is decomposed, and the decomp. products and (if present) NH3 are released and absorbed in an aqs. soln. which is returned to the reactor, the decompn., separation and absorption being carried out at a pressure equal to that in the reactor.
ES361420A 1967-12-15 1968-12-14 Urea prodn from ammonia and carbon dioxide Expired ES361420A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2391467 1967-12-15

Publications (1)

Publication Number Publication Date
ES361420A1 true ES361420A1 (en) 1970-11-01

Family

ID=11210843

Family Applications (1)

Application Number Title Priority Date Filing Date
ES361420A Expired ES361420A1 (en) 1967-12-15 1968-12-14 Urea prodn from ammonia and carbon dioxide

Country Status (5)

Country Link
BE (1) BE725443A (en)
DE (1) DE1814480A1 (en)
ES (1) ES361420A1 (en)
FR (1) FR1597818A (en)
NL (1) NL6817924A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5517346A (en) * 1978-07-24 1980-02-06 Toyo Eng Corp Synthetic method of urea

Also Published As

Publication number Publication date
DE1814480A1 (en) 1969-07-03
FR1597818A (en) 1970-06-29
BE725443A (en) 1969-06-13
NL6817924A (en) 1969-06-17

Similar Documents

Publication Publication Date Title
GB952764A (en) Preparation of urea
ZA713344B (en) Process and apparatus for the recovery of ammonia and carbon dioxide from the tail gas of a urea synthesis
GB1043466A (en) Melamine synthesis
ES328042A1 (en) Improvements introduced in the procedure of synthetizing urea from ammonia with gaseous carbon dioxide. (Machine-translation by Google Translate, not legally binding)
GB1207923A (en) Process for urea production in combination with ammonia synthesis
GB1247951A (en) Process for preparing melamine from urea
ES361420A1 (en) Urea prodn from ammonia and carbon dioxide
ES392715A1 (en) Urea synthesis
GB960039A (en) Urea synthesis process
ES343801A1 (en) Procedure for the obtaining of crystallized urea with a low content of biuret. (Machine-translation by Google Translate, not legally binding)
GB981641A (en) Production of urea
GB1147734A (en) Method for the preparation of urea
CA975797A (en) Process for the production of urea from a solution containing ammonium carbamate, ammonia and water, with a total recycle of ammonia and carbon dioxide which were not transformed
GB1016220A (en) Production of urea
ES386315A1 (en) Process for separating off melamine from a hot synthesis gas mixture which contains melamine vapor
GB1099371A (en) Process for the production of urea by synthesis from ammonia and carbon dioxide
GB1253724A (en) Process for producing urea
GB1181039A (en) Process for the Production of Urea
GB1288697A (en)
GB1246660A (en) Process for the preparation of urea in combination with the synthesis of ammonia
ES275925A1 (en) Procedure for the production of urea based on ammoniac vapors (Machine-translation by Google Translate, not legally binding)
DK104885C (en) Process for the synthesis of urea of ammonia and carbon dioxide with the return of non-urea converted ammonium carbamate and excess ammonia.
GB995184A (en) Urea synthesis process
GB883509A (en) Process for synthesizing urea
ES427408A1 (en) Synthesis of 5-(beta-methylmercaptoethyl)-hydantoin