GB1273913A - Synthesis of urea - Google Patents

Synthesis of urea

Info

Publication number
GB1273913A
GB1273913A GB28117/70A GB2811770A GB1273913A GB 1273913 A GB1273913 A GB 1273913A GB 28117/70 A GB28117/70 A GB 28117/70A GB 2811770 A GB2811770 A GB 2811770A GB 1273913 A GB1273913 A GB 1273913A
Authority
GB
United Kingdom
Prior art keywords
urea
zone
synthesis
june
maintained
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
GB28117/70A
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals 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
Priority claimed from JP44045395A external-priority patent/JPS4842860B1/ja
Priority claimed from JP44071237A external-priority patent/JPS4843101B1/ja
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Publication of GB1273913A publication Critical patent/GB1273913A/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

Landscapes

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

Abstract

1,273,913. Synthesis of urea. MITSUI TOATSU CHEMICALS Inc. 10 June, 1970 [11 June, 1969; 10 Sept., 1969], No. 28117/70. Heading C2C. A process in which urea is synthesized comprises feeding to and reacting in a heat-recovery zone 7 maintained at urea-synthesis pressure, CO 2 and NH 3 to form a reaction mixture containing ammonium carbonate, the NH 3 /CO 2 molar feed ratio not exceeding 4 : 1, removing all of or some part of the heat of reaction from zone 7, then feeding the reaction mixture and any remaining NH 3 into a urea-synthesis zone 12 maintained at a urea-synthesis pressure to form urea, and maintaining the temperature in zone 12 substantially constant by adjusting the relative amounts of NH 3 fed to zone 7 and zone .12 e.g. through control valve 9 operated by a servomotor in response to the outlet temperature of autoclave 12.
GB28117/70A 1969-06-11 1970-06-10 Synthesis of urea Expired GB1273913A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP44045395A JPS4842860B1 (en) 1969-06-11 1969-06-11
JP44071237A JPS4843101B1 (en) 1969-09-10 1969-09-10

Publications (1)

Publication Number Publication Date
GB1273913A true GB1273913A (en) 1972-05-10

Family

ID=26385371

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28117/70A Expired GB1273913A (en) 1969-06-11 1970-06-10 Synthesis of urea

Country Status (6)

Country Link
DK (1) DK137233B (en)
ES (1) ES379855A1 (en)
FR (1) FR2051080A5 (en)
GB (1) GB1273913A (en)
NL (1) NL166013C (en)
SU (1) SU458126A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094903A (en) * 1976-01-21 1978-06-13 Ivo Mavrovic Urea synthesis with improved heat recovery and conversion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1211125B (en) * 1981-10-16 1989-09-29 Ortu Francesco NITROGEN COMPOUNDS. PROCESS FOR THE PREPARATION OF

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL227595A (en) * 1958-05-07
NL101446C (en) * 1960-04-08
FR1458030A (en) * 1964-12-16 1966-01-24 Stamicarbon Method and device for the preparation of urea
FR1487249A (en) * 1966-04-05 1967-06-30 Inventa Ag Process for manufacturing urea from ammonia and carbon dioxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094903A (en) * 1976-01-21 1978-06-13 Ivo Mavrovic Urea synthesis with improved heat recovery and conversion

Also Published As

Publication number Publication date
DK137233B (en) 1978-02-06
NL166013C (en) 1981-06-15
ES379855A1 (en) 1973-02-16
DK137233C (en) 1978-07-10
FR2051080A5 (en) 1971-04-02
NL7007846A (en) 1970-12-15
SU458126A3 (en) 1975-01-25
NL166013B (en) 1981-01-15

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Legal Events

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