GB1104710A - Process for making ammonia and urea - Google Patents

Process for making ammonia and urea

Info

Publication number
GB1104710A
GB1104710A GB24720/66A GB2472066A GB1104710A GB 1104710 A GB1104710 A GB 1104710A GB 24720/66 A GB24720/66 A GB 24720/66A GB 2472066 A GB2472066 A GB 2472066A GB 1104710 A GB1104710 A GB 1104710A
Authority
GB
United Kingdom
Prior art keywords
ammonia
zone
urea
carbon dioxide
synthesis 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
GB24720/66A
Inventor
Henry Hsu
Wayne Carl Jaeschke
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.)
Pullman Inc
Original Assignee
Pullman Inc
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 Pullman Inc filed Critical Pullman Inc
Priority claimed from NL6608287A external-priority patent/NL6608287A/xx
Publication of GB1104710A publication Critical patent/GB1104710A/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
    • Y02P20/10—Process efficiency
    • 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
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

An integrated process for making ammonia and urea comprises passing ammonia synthesis gas, containing carbon dioxide, nitrogen and hydrogen, into a first zone maintained under conditions to separate carbon dioxide from the synthesis gas in an ammonia-containing liquid and to obtain a condensate comprising ammonium carbamate, passing the remaining ammonia synthesis gas to an ammonia synthesis zone and passing said condensate into a second zone maintained at a pressure higher than said first zone and under urea synthesis conditions to produce urea therefrom. Alternatively, a portion of the raw ammonia synthesis gas may be passed directly to a conventional carbon dioxide purification system and the synthesis gas from which the carbon dioxide has been removed may then be passed to the ammonia synthesis zone. The ammonia synthesis may be effected by a known process and the product may be passed to the urea synthesis zone. The whole process may be effected either batchwise or continuously.ALSO:An integrated process for making ammonia and urea comprises passing ammonia synthesis gas, containing carbon dioxide, nitrogen and hydrogen, into a first zone maintained under conditions to separate carbon dioxide from the synthesis gas in an ammonia-containing liquid and to obtain a condensate comprising ammonium carbamate, passing the remaining ammonia synthesis gas to an ammonia synthesis zone and passing said condensate into a second zone maintained at a pressure higher than said first zone and under urea synthesis conditions to produce urea therefrom. The ammonia synthesis gas is suitably passed into the condensation and absorption zone at a pressure below 1000 p.s.i.g. and the condensate is suitably pressurized and passed to the urea synthesis zone operated at an elevated pressure, e.g. between 1700 and about 3500 p.s.i.g. The reaction effluent from the urea synthesis zone is preferably depressurized and heated to decompose ammonium carbamate to a gaseous mixture of ammonia, carbon dioxide and water, which is separated from the remaining effluent containing aqueous urea. The gaseous mixture is preferably passed to the condensation and absorption zone in which it is condensed and used to absorb carbon dioxide present in the raw ammonia synthesis gas. A portion of the raw ammonia synthesis gas may be diverted to a conventional carbon dioxide purification system and the carbon dioxide so obtained may be passed to the urea synthesis zone to react with ammonia. The ammonia produced in the ammonia synthesis zone may also be passed to the urea synthesis zone, and the whole process may be operated either batchwise or continuously.
GB24720/66A 1962-09-10 1966-06-02 Process for making ammonia and urea Expired GB1104710A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22253162A 1962-09-10 1962-09-10
NL6608287A NL6608287A (en) 1966-06-15 1966-06-15

Publications (1)

Publication Number Publication Date
GB1104710A true GB1104710A (en) 1968-02-28

Family

ID=26644049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24720/66A Expired GB1104710A (en) 1962-09-10 1966-06-02 Process for making ammonia and urea

Country Status (1)

Country Link
GB (1) GB1104710A (en)

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