FR2095106A5 - Urea process from ammonia and carbon dioxide - improved by stripping recycle carbamate with feed carbon dioxide - Google Patents

Urea process from ammonia and carbon dioxide - improved by stripping recycle carbamate with feed carbon dioxide

Info

Publication number
FR2095106A5
FR2095106A5 FR7120761A FR7120761A FR2095106A5 FR 2095106 A5 FR2095106 A5 FR 2095106A5 FR 7120761 A FR7120761 A FR 7120761A FR 7120761 A FR7120761 A FR 7120761A FR 2095106 A5 FR2095106 A5 FR 2095106A5
Authority
FR
France
Prior art keywords
gas
heat
carbon dioxide
effluent
feed
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
FR7120761A
Other languages
French (fr)
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.)
Chemical Construction Corp
Original Assignee
Chemical Construction Corp
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 Chemical Construction Corp filed Critical Chemical Construction Corp
Priority to FR7120761A priority Critical patent/FR2095106A5/en
Application granted granted Critical
Publication of FR2095106A5 publication Critical patent/FR2095106A5/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
    • Y02P20/10—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
    • Y02P20/141—Feedstock

Landscapes

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

Abstract

In a high pressure synthetic of urea, aq. NH4 carbamate (I) is recycled by pressurising and stripping with feed CO2, pref. at about synthesis reactor pressure. This is carried out in a heat exchanger, externally heated to decompose (I), giving a high pressure off-gas contg. CO2 and NH3 and a discardable liquid effluent. Feed NH3 is pref. added to the off-gas to give an NH3:CO2 ratio of 2:1 and this is passed through a heat-exchanger to heat effluent from the reactor, thus decomposing (I) in the effluent and giving an off-gas which is converted to the aq. (I) soln. This results in the condensation of molten (I), to produced a gas-liquid mixture of low water content. This condensed (I) is passed to the synthesis reactor. Alternatively, the enriched off-gas is cooled in heat-exchange with liq. water to produce steam used to heat the synthesis effluent and decompose (I). Advantages are avoidance of urea decomposition by stripping operations, reduced water content of recycled (I), conversion rate raised from 67-75%, reduction in reactor vol.% a 25% reduction in energy required for evaporation.
FR7120761A 1971-06-08 1971-06-08 Urea process from ammonia and carbon dioxide - improved by stripping recycle carbamate with feed carbon dioxide Expired FR2095106A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7120761A FR2095106A5 (en) 1971-06-08 1971-06-08 Urea process from ammonia and carbon dioxide - improved by stripping recycle carbamate with feed carbon dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7120761A FR2095106A5 (en) 1971-06-08 1971-06-08 Urea process from ammonia and carbon dioxide - improved by stripping recycle carbamate with feed carbon dioxide

Publications (1)

Publication Number Publication Date
FR2095106A5 true FR2095106A5 (en) 1972-02-04

Family

ID=9078303

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7120761A Expired FR2095106A5 (en) 1971-06-08 1971-06-08 Urea process from ammonia and carbon dioxide - improved by stripping recycle carbamate with feed carbon dioxide

Country Status (1)

Country Link
FR (1) FR2095106A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114901636A (en) * 2019-12-30 2022-08-12 斯塔米卡邦有限公司 Removal of ammonia from urea finishing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114901636A (en) * 2019-12-30 2022-08-12 斯塔米卡邦有限公司 Removal of ammonia from urea finishing
US11905234B2 (en) 2019-12-30 2024-02-20 Stamicarbon B.V. Ammonia removal from urea finishing
US11912649B2 (en) 2019-12-30 2024-02-27 Stamicarbon B.V. Ammonia removal from urea finishing

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Legal Events

Date Code Title Description
ST Notification of lapse