LTIP996A - Process for the production of urea by steps and implementation also on existing plants - Google Patents

Process for the production of urea by steps and implementation also on existing plants

Info

Publication number
LTIP996A
LTIP996A LTIP996A LTIP996A LTIP996A LT IP996 A LTIP996 A LT IP996A LT IP996 A LTIP996 A LT IP996A LT IP996 A LTIP996 A LT IP996A LT IP996 A LTIP996 A LT IP996A
Authority
LT
Lithuania
Prior art keywords
reactor
urea
section
recycle
implementation
Prior art date
Application number
LTIP996A
Inventor
Giorgio Pagani
Original Assignee
Urea Casale Sa
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25692477&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=LTIP996(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Urea Casale Sa filed Critical Urea Casale Sa
Publication of LTIP996A publication Critical patent/LTIP996A/en
Publication of LT3607B publication Critical patent/LT3607B/en

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

Landscapes

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

Abstract

A process is described for the industrial synthesis of urea, making the ammonia (NH3) and the carbon dioxide (CO2) react, in at least one reaction space, at high pressures and temperatures and recycling at least in part the unreacted products obtained in a recycle section, characterized by: a) a synthesis reaction between reactants of high purity; and b) a synthesis reaction between less pure reactants, substantially recycled by the so-called recycle section. The corresponding new plant includes a reactor (R1) of high yield ("once through"), a reactor (R2) of lower yield and a section of recovery and recycle. The application of the process to preexisting plants requires the simple addition of a reactor of high yield and of pumping devices. <IMAGE>
LTIP996A 1990-10-05 1993-09-17 Process for the production of urea by steps and implementation also on existing plants LT3607B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH321690 1990-10-05
US08/041,944 US5403956A (en) 1990-10-05 1993-04-02 Process for urea production

Publications (2)

Publication Number Publication Date
LTIP996A true LTIP996A (en) 1995-04-25
LT3607B LT3607B (en) 1995-12-27

Family

ID=25692477

Family Applications (1)

Application Number Title Priority Date Filing Date
LTIP996A LT3607B (en) 1990-10-05 1993-09-17 Process for the production of urea by steps and implementation also on existing plants

Country Status (7)

Country Link
US (3) US5403956A (en)
EP (1) EP0479103B1 (en)
CN (1) CN1052975C (en)
AT (1) ATE134994T1 (en)
DE (1) DE69117641T2 (en)
LT (1) LT3607B (en)
RU (1) RU2040518C1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE134994T1 (en) * 1990-10-05 1996-03-15 Urea Casale Sa METHOD FOR PRODUCING UREA WITH DIFFERENT PERFORMANCES AND IMPLEMENTATION IN EXISTING PLANTS
US6150555A (en) * 1992-05-08 2000-11-21 Urea Casale, S.A. Process for urea production
US6274767B1 (en) * 1992-11-19 2001-08-14 Urea Casale, S.A. Process for the revamping of urea synthesis plants consisting of a stripper with ammonia
DE69326881D1 (en) * 1993-01-07 1999-12-02 Urea Casale Sa Improved process for producing urea using a carbon dioxide removal step
US5523482A (en) * 1993-05-14 1996-06-04 Urea Casale S.A. Process and plant for the production of urea in reaction spaces with different yields
CA2141886E (en) * 1994-05-11 1999-10-12 Federico Zardi Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature
ZA9510881B (en) * 1994-12-23 1996-08-14 Urea Casale Sa Process for plant for urea production with reaction spaces having differentiated yields
IT1274362B (en) * 1995-02-16 1997-07-17 Snam Progetti HIGH YIELD PROCEDURE FOR THE SYNTHESIS OF UREA
ES2158232T3 (en) * 1996-08-01 2001-09-01 Urea Casale Sa PROCEDURE AND PLANT FOR UREA PRODUCTION WITH HIGH CONVERSION PERFORMANCE AND LOW ENERGY CONSUMPTION.
US6231632B1 (en) 1999-05-25 2001-05-15 Engelhard Corporation Urea processing agent
US7687041B2 (en) * 2008-02-27 2010-03-30 Kellogg Brown & Root Llc Apparatus and methods for urea production
EP2784062A1 (en) * 2013-03-27 2014-10-01 Urea Casale SA Method for revamping a self-stripping urea plant
EP3766865A1 (en) * 2019-07-18 2021-01-20 Casale Sa A process for the synthesis of urea

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942120A (en) * 1930-07-17 1934-01-02 Standard Oil Co Hydrogenation system
US3049563A (en) * 1957-04-05 1962-08-14 Sxpaf
US3091637A (en) * 1960-05-17 1963-05-28 Chemical Construction Corp Dual cycle urea synthesis process
US3222040A (en) * 1962-06-25 1965-12-07 John S Eckert Support plate for packed tower
GB1124547A (en) * 1966-05-02 1968-08-21 Toyo Koatsu Ind Inc Production of urea
GB1217560A (en) * 1967-07-31 1970-12-31 Mitsui Toatsu Chemicals Synthesis of urea
US4088686A (en) * 1976-01-21 1978-05-09 Ivo Mavrovic Urea synthesis with improved heat recovery and conversion
JPS5750954A (en) * 1980-09-12 1982-03-25 Mitsui Toatsu Chem Inc Synthesis of urea
IT1211125B (en) * 1981-10-16 1989-09-29 Ortu Francesco NITROGEN COMPOUNDS. PROCESS FOR THE PREPARATION OF
US4929399A (en) * 1988-03-17 1990-05-29 Union Carbide Industrial Gases Technology Inc. Structured column packing with liquid holdup
IT1240675B (en) 1990-04-24 1993-12-17 Snam Progetti PROCEDURE FOR THE VACUUM CONCENTRATION OF UREA SOLUTIONS
ATE134994T1 (en) * 1990-10-05 1996-03-15 Urea Casale Sa METHOD FOR PRODUCING UREA WITH DIFFERENT PERFORMANCES AND IMPLEMENTATION IN EXISTING PLANTS
EP0497215A1 (en) * 1991-01-29 1992-08-05 Urea Casale S.A. Process and plant for the production of urea with differentiated yield reaction spaces
IT1245396B (en) * 1991-03-22 1994-09-20 Snam Progetti PROCEDURE FOR THE PRODUCTION OF HIGH ENERGY EFFICIENCY UREA
ATE167666T1 (en) * 1991-11-14 1998-07-15 Urea Casale Sa METHOD FOR PRODUCING UREA WITH REACTION SPACES OF DIFFERENT YIELDS

Also Published As

Publication number Publication date
DE69117641T2 (en) 1996-10-02
ATE134994T1 (en) 1996-03-15
LT3607B (en) 1995-12-27
DE69117641D1 (en) 1996-04-11
CN1065060A (en) 1992-10-07
US5580236A (en) 1996-12-03
RU2040518C1 (en) 1995-07-25
CN1052975C (en) 2000-05-31
US5573735A (en) 1996-11-12
EP0479103A1 (en) 1992-04-08
EP0479103B1 (en) 1996-03-06
US5403956A (en) 1995-04-04

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Effective date: 20000917