GB1292515A - Process for producing urea - Google Patents

Process for producing urea

Info

Publication number
GB1292515A
GB1292515A GB03413/70A GB1341370A GB1292515A GB 1292515 A GB1292515 A GB 1292515A GB 03413/70 A GB03413/70 A GB 03413/70A GB 1341370 A GB1341370 A GB 1341370A GB 1292515 A GB1292515 A GB 1292515A
Authority
GB
United Kingdom
Prior art keywords
aqueous solution
urea
reaction vessel
gaseous phase
pressure
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
GB03413/70A
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.)
SnamProgetti SpA
Original Assignee
SnamProgetti 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 SnamProgetti SpA filed Critical SnamProgetti SpA
Publication of GB1292515A publication Critical patent/GB1292515A/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
    • C07C273/14—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
    • 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
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1292515 Urea SNAM PROGETTI SpA 19 March 1970 [4 April 1969] 13413/70 Heading C2C A process for the production of an aqueous solution of urea comprises reacting ammonia and carbon dioxide in a reaction vessel and allowing the resulting aqueous solution to flow as a film down a heated surface in a decomposition chamber to cause removal of the volatile products and starting materials from the aqueous solution as a gaseous phase, which gaseous phase flows countercurrently to the aqueous solution, the pressure in the decomposition chamber being lower than that in the reaction vessel. The countercurrent flow may be assisted by passing a stripping fluid in the form of an inert gas over the film. The process is preferably carried out at a temperature of from 50‹ to 250‹ C. at a pressure of from 0.1 to 250 atmospheres.
GB03413/70A 1969-04-04 1970-03-19 Process for producing urea Expired GB1292515A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1507269 1969-04-04

Publications (1)

Publication Number Publication Date
GB1292515A true GB1292515A (en) 1972-10-11

Family

ID=11146229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB03413/70A Expired GB1292515A (en) 1969-04-04 1970-03-19 Process for producing urea

Country Status (17)

Country Link
JP (1) JPS5238017B1 (en)
AT (1) AT305304B (en)
BE (1) BE747769A (en)
BR (1) BR7017988D0 (en)
CA (1) CA949918A (en)
CH (1) CH514555A (en)
CS (1) CS152471B2 (en)
DE (1) DE2015781B2 (en)
ES (1) ES378592A1 (en)
FR (1) FR2042135A5 (en)
GB (1) GB1292515A (en)
IE (1) IE34603B1 (en)
LU (1) LU60616A1 (en)
NL (1) NL7004886A (en)
RO (1) RO69432A (en)
YU (1) YU35113B (en)
ZM (1) ZM3570A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899813A (en) * 1984-04-20 1990-02-13 Snamprogetti S.P.A. Process and apparatus for the synthesis of urea and material used in it
WO2013104638A1 (en) 2012-01-09 2013-07-18 Saipem S.P.A Process for the synthesis of urea comprising a passivation stream at the stripper bottom

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3259661B2 (en) * 1997-06-27 2002-02-25 株式会社イトーキクレビオ Panel body connection device
DE102019208859A1 (en) 2019-06-18 2020-12-24 Skw Stickstoffwerke Piesteritz Gmbh Process for the continuous production of pure urea solutions by utilizing process water

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899813A (en) * 1984-04-20 1990-02-13 Snamprogetti S.P.A. Process and apparatus for the synthesis of urea and material used in it
WO2013104638A1 (en) 2012-01-09 2013-07-18 Saipem S.P.A Process for the synthesis of urea comprising a passivation stream at the stripper bottom
US9199926B2 (en) 2012-01-09 2015-12-01 Saipem S.P.A. Process for the synthesis of urea comprising a passivation stream at the stripper bottom

Also Published As

Publication number Publication date
JPS5238017B1 (en) 1977-09-27
YU35113B (en) 1980-09-25
ES378592A1 (en) 1972-06-16
AT305304B (en) 1973-01-15
IE34603B1 (en) 1975-06-25
DE2015781B2 (en) 1973-05-03
FR2042135A5 (en) 1971-02-05
NL7004886A (en) 1970-10-06
CA949918A (en) 1974-06-25
RO69432A (en) 1980-12-30
DE2015781A1 (en) 1970-10-08
CS152471B2 (en) 1973-12-19
YU85270A (en) 1979-12-31
ZM3570A1 (en) 1971-07-22
CH514555A (en) 1971-10-31
LU60616A1 (en) 1970-05-28
BR7017988D0 (en) 1973-04-12
BE747769A (en) 1970-08-31
IE34603L (en) 1970-10-04

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee