ES374565A1 - Process for the production of urea - Google Patents

Process for the production of urea

Info

Publication number
ES374565A1
ES374565A1 ES374565A ES374565A ES374565A1 ES 374565 A1 ES374565 A1 ES 374565A1 ES 374565 A ES374565 A ES 374565A ES 374565 A ES374565 A ES 374565A ES 374565 A1 ES374565 A1 ES 374565A1
Authority
ES
Spain
Prior art keywords
urea
reactor
aqueous solution
ammonium carbamate
inert gas
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
ES374565A
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.)
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 ES374565A1 publication Critical patent/ES374565A1/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
    • 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
    • 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

Abstract

A process for the continuous production of an aqueous solution of urea comprises reacting CO 2 and NH 3 in the presence of water in a first reactor so as to form an aqueous solution of ammonium carbamate, converting in a second reactor at least part of the ammonium carbamate in the aqueous solution to urea, decomposing any unconverted ammonium carbamate into CO 2 and NH 3 , stripping in the presence of a gas which is inert to the initial reactants or to ammonium carbamate, the last-mentioned CO 2 and NH 3 from the urea, causing or allowing the purified urea to be withdrawn as an aqueous solution, and recycling to the first reactor the inert gas and the stripped CO 2 and NH 3 , said inert gas leaving the first reactor as a gaseous effluent and at least a part of said effluent inert gas being re-employed in a subsequent stripping operation.
ES374565A 1968-12-16 1969-12-15 Process for the production of urea Expired ES374565A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2513168 1968-12-16

Publications (1)

Publication Number Publication Date
ES374565A1 true ES374565A1 (en) 1972-01-01

Family

ID=11215793

Family Applications (1)

Application Number Title Priority Date Filing Date
ES374565A Expired ES374565A1 (en) 1968-12-16 1969-12-15 Process for the production of urea

Country Status (19)

Country Link
JP (1) JPS4828422B1 (en)
AT (1) AT305303B (en)
BE (1) BE743187A (en)
BR (1) BR6915202D0 (en)
CA (1) CA975797A (en)
CH (1) CH507213A (en)
CS (1) CS152343B2 (en)
DE (1) DE1962862A1 (en)
DK (1) DK145081C (en)
ES (1) ES374565A1 (en)
FR (1) FR2026261A1 (en)
GB (1) GB1268430A (en)
IE (1) IE33879B1 (en)
LU (1) LU60025A1 (en)
NL (1) NL169465C (en)
NO (1) NO135868C (en)
RO (1) RO59626A (en)
YU (1) YU39894B (en)
ZM (1) ZM17669A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE787832A (en) * 1971-09-02 1973-02-22 Stamicarbon PROCESS FOR THE PREPARATION OF UREA
JPS53102724A (en) * 1977-02-18 1978-09-07 Matsushita Electric Ind Co Ltd Magnetic head and its manufacture
JPS5575833U (en) * 1978-11-15 1980-05-24
JPS61109760A (en) * 1984-11-02 1986-05-28 Toyo Eng Corp Production of urea
EP3233792B1 (en) 2014-12-18 2019-09-04 Stamicarbon B.V. Process for urea production

Also Published As

Publication number Publication date
DE1962862A1 (en) 1970-07-02
BR6915202D0 (en) 1973-03-08
RO59626A (en) 1976-08-15
AT305303B (en) 1973-02-26
NL6918420A (en) 1970-06-18
NO135868C (en) 1977-06-15
IE33879L (en) 1970-06-16
GB1268430A (en) 1972-03-29
NO135868B (en) 1977-03-07
ZM17669A1 (en) 1970-05-18
CH507213A (en) 1971-05-15
DK145081B (en) 1982-08-23
LU60025A1 (en) 1970-02-16
DK145081C (en) 1983-01-31
FR2026261A1 (en) 1970-09-18
NL169465C (en) 1982-07-16
JPS4828422B1 (en) 1973-09-01
YU39894B (en) 1985-06-30
BE743187A (en) 1970-05-28
NL169465B (en) 1982-02-16
YU310469A (en) 1982-02-28
IE33879B1 (en) 1974-11-27
CA975797A (en) 1975-10-07
CS152343B2 (en) 1973-12-19

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