GB1207924A - Process of preparing urea - Google Patents

Process of preparing urea

Info

Publication number
GB1207924A
GB1207924A GB03347/69A GB1334769A GB1207924A GB 1207924 A GB1207924 A GB 1207924A GB 03347/69 A GB03347/69 A GB 03347/69A GB 1334769 A GB1334769 A GB 1334769A GB 1207924 A GB1207924 A GB 1207924A
Authority
GB
United Kingdom
Prior art keywords
synthesis
ammonium
urea
gas
carbamate
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
GB03347/69A
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB1207924A publication Critical patent/GB1207924A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/02—Preparation, purification or separation of ammonia
    • C01C1/04—Preparation of ammonia by synthesis in the gas phase
    • C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
    • C01C1/0488—Processes integrated with preparations of other compounds, e.g. methanol, urea or with processes for power generation
    • 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
    • C07C273/10—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 combined with the synthesis of 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
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

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

Abstract

1,207,924. Urea. STAMICARBON N.V. 13 March, 1969 [16 March, 1968], No. 13347/69. Heading C2C. Urea is produced from ammonia and carbon dioxide in a combined urea-synthesis/ammoniasynthesis process in which (a) "synthesis gas" comprising hydrogen and carbon dioxide with carbon monoxide as contaminant and optionally also containing nitrogen is passed to an ammonium - carbamate - forming zone of a urea - synthesis zone, (b) oxygen is mixed with the synthesis gas in an amount based on the amount of carbon monoxide therein, (c) carbon monoxide in the effluent gas from the ammonium-carbamate - forming zone is oxidized to carbon dioxide, (d) carbon-dioxide is removed from the effluent gas with an ammoniacal solution to form an ammonium carbonate solution which is recycled to the ammonium - carbamate - forming zone, and (e) the effluent gas freed from carbon dioxide is passed to an ammoniasynthesis zone and the ammonia so produced is passed to the ammonium - carbamate - forming zone. The solution produced in the urea synthesis zone may be stripped to remove ammonium carbamate in two stripping stages at substantially equal elevated pressures, the stripping gas in the first stage being the above-mentioned synthesis gas and in the second stage being comprised of the gas streams used for the ammonia synthesis being substantially free from ammonia and carbon dioxide (see Specification 1,207,923.
GB03347/69A 1968-03-16 1969-03-13 Process of preparing urea Expired GB1207924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6803776.A NL156391B (en) 1968-03-16 1968-03-16 PROCEDURE FOR THE PREPARATION OF UREA IN COMBINATION WITH THE SYNTHESIS OF AMMONIA.

Publications (1)

Publication Number Publication Date
GB1207924A true GB1207924A (en) 1970-10-07

Family

ID=19803057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB03347/69A Expired GB1207924A (en) 1968-03-16 1969-03-13 Process of preparing urea

Country Status (7)

Country Link
AT (1) AT288418B (en)
BE (1) BE729863A (en)
CH (1) CH530380A (en)
DE (1) DE1913122B2 (en)
FR (1) FR2004056A1 (en)
GB (1) GB1207924A (en)
NL (1) NL156391B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167066A (en) * 1984-11-02 1986-05-21 Toyo Engineering Corp Process for producing urea

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303215A (en) * 1962-03-09 1967-02-07 Toyo Koatsu Ind Inc Synthesis of urea
FR1489778A (en) * 1962-09-10 1967-07-28 Pullman Inc Manufacturing process for ammonia and urea
FR1409027A (en) * 1963-09-09 1965-08-20 Chemical Construction Corproat Process for the simultaneous preparation of ammonia and urea

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167066A (en) * 1984-11-02 1986-05-21 Toyo Engineering Corp Process for producing urea

Also Published As

Publication number Publication date
DE1913122B2 (en) 1978-05-03
BE729863A (en) 1969-09-15
CH530380A (en) 1972-11-15
NL6803776A (en) 1969-09-18
AT288418B (en) 1971-03-10
DE1913122A1 (en) 1969-10-02
FR2004056A1 (en) 1969-11-21
NL156391B (en) 1978-04-17

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Legal Events

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