AR240839A2 - Metodo para evitar la corrosion de los separadores en las plantas de fabricacion de urea. - Google Patents

Metodo para evitar la corrosion de los separadores en las plantas de fabricacion de urea.

Info

Publication number
AR240839A2
AR240839A2 AR29224383A AR29224383A AR240839A2 AR 240839 A2 AR240839 A2 AR 240839A2 AR 29224383 A AR29224383 A AR 29224383A AR 29224383 A AR29224383 A AR 29224383A AR 240839 A2 AR240839 A2 AR 240839A2
Authority
AR
Argentina
Prior art keywords
injected
passive
oxygen
manufacturing plants
preference
Prior art date
Application number
AR29224383A
Other languages
English (en)
Other versions
AR240839A1 (es
Original Assignee
Montedison Spa
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=26327963&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AR240839(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from IT21666/82A external-priority patent/IT1157946B/it
Priority claimed from IT22962/82A external-priority patent/IT1196422B/it
Application filed by Montedison Spa filed Critical Montedison Spa
Application granted granted Critical
Publication of AR240839A2 publication Critical patent/AR240839A2/es
Publication of AR240839A1 publication Critical patent/AR240839A1/es

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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S203/00—Distillation: processes, separatory
    • Y10S203/09—Plural feed

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

UN METODO PARA PASIVAR LA SUPERFICIE DE LOS SEPARADORES DE LAS PLANTAS DE FABRICACION DE UREA, EN DONDE LAS TEMPERATURAS SON MUY ALTAS, DONDE LA GAMA DE PRESIONES ESTA COMPRENDIDA ENTRE 120 Y 240 KG/CM2 Y EN DONDE EL FLUJO DEL PROCESO EFLUENTE DEL REACTOR DE SINTESIS SUFRE UNA O MAS EVAPORACIONES DE CAIDA DE PELICULA, DE PREFERENCIA EN CONTRACORRIENTE CON UN GAS IMPULSOR CONSTITUIDO POR NH3 O C02, QUE SE LLEVA A CABO POR MEDIO DE UNA COMBINACION SINERGISTICA DE OXIGENO, DE PREFERENCIA INYECTADO EN EL FONDO DE POR LO MENOS UN SEPARADOR, Y DE UN SEGUNDO AGENTE PASIVANTE, DE PREFERENCIA INYECTADO EN EL FLUJO DE PROCESO QUE PENETRA POR LA CABEZA DE POR LO MENOS UN SEPARADOR, EN DONDE DICHO SEGUNDO AGENTE PASIVANTE SE INYECTA EN ESTADO LIQUIDO O COMO UNA SOLUCION LIQUIDA, ANTES DEL INICIO DE LA EVAPORACION O CONTEMPORANEAMENTE CON ESTA, ELEGIDO ENTRE UN GRUPO CONSTITUIDO POR H202, NITRITOS DE METAL ALCALINO O (NH4)2S208; ESTANDO COMPRENDIDA LA CANTIDAD GLOBAL DE AGENTE PASIVANTE, EXPRESADA COMO OXIGENO ACTIVO, ENTRE 1 Y 25 PPM CON RESPECTO AL FLUJO DE PROCESO EFLUENTE QUE ABANDONA EL REACTOR DE SINTESIS, Y LA CANTIDAD GLOBAL DE OXIGENO ENTRE 200 Y 2000 PPM CON RESPECTO AL C02.
AR292243A 1982-06-03 1983-02-28 Metodo para evitar la corrosion de los separadores en las plantas de fabricacion de urea. AR240839A1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21666/82A IT1157946B (it) 1982-06-03 1982-06-03 Metodo per eliminare la corrosione delle apparecchiature di strippaggio usate negli impianti per la produzione di urea
IT22962/82A IT1196422B (it) 1982-08-25 1982-08-25 Metodo per eliminare la corrosione delle apparecchiature di strippaggio usate negli impianti per la produzione di urea

Publications (2)

Publication Number Publication Date
AR240839A2 true AR240839A2 (es) 1991-02-28
AR240839A1 AR240839A1 (es) 1991-02-28

Family

ID=26327963

Family Applications (1)

Application Number Title Priority Date Filing Date
AR292243A AR240839A1 (es) 1982-06-03 1983-02-28 Metodo para evitar la corrosion de los separadores en las plantas de fabricacion de urea.

Country Status (8)

Country Link
US (1) US4758311A (es)
EP (1) EP0096151B1 (es)
AR (1) AR240839A1 (es)
BR (1) BR8301109A (es)
CA (1) CA1211689A (es)
DE (1) DE3364579D1 (es)
ES (1) ES519891A0 (es)
PT (1) PT76639B (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8907320A (pt) * 1988-03-17 1991-03-19 Comalco Alu Protecao de superficies metalicas
CH679485A5 (es) * 1989-12-29 1992-02-28 Ammonia Casale Sa
IT1251524B (it) * 1991-03-18 1995-05-16 Vincenzo Lagana Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione
DE4424638A1 (de) * 1994-07-13 1996-04-11 Univ Dresden Tech Verfahren zur Herstellung von oxidischen Korrosionsschutzschichten auf hoch chromlegierten Stählen
DE19544224B4 (de) * 1995-11-28 2004-10-14 Alstom Chemische Fahrweise eines Wasser/Dampf-Kreislaufes
US6334886B1 (en) 2000-05-12 2002-01-01 Air Products And Chemicals, Inc. Removal of corrosive contaminants from alkanolamine absorbent process
GB0124846D0 (en) * 2001-10-16 2001-12-05 Unilever Plc Corrosion protection process
NL1027697C2 (nl) * 2004-12-09 2006-06-12 Dsm Ip Assets Bv Werkwijze voor het verhogen van de capaciteit van een bestaand ureumproces.
KR101234149B1 (ko) * 2008-04-10 2013-02-18 노키아 코포레이션 두 신호들을 처리하고 다음에 처리될 신호를 결정하는 장치 및 방법
WO2014192823A1 (ja) 2013-05-28 2014-12-04 東洋エンジニアリング株式会社 尿素合成方法
CN112154138A (zh) * 2018-04-13 2020-12-29 东洋工程株式会社 尿素的制造方法
CN115354270B (zh) * 2022-08-16 2024-09-10 广东思泉热管理技术有限公司 一种均热板钝化剂及其应用

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625397A (es) *
US1986973A (en) * 1930-11-17 1935-01-08 Du Pont Prevention of corrosion in urea synthesis
NL77361C (es) * 1953-04-15
AT187917B (de) * 1953-04-15 1956-12-10 Stamicarbon Verfahren zur Verhinderung der Korrosion bei der Herstellung von Harnstoff aus NH3 und CO2
US3488293A (en) * 1964-10-16 1970-01-06 Allied Chem Prevention of corrosion due to urea fertilizer effluent
CH498811A (de) * 1967-05-22 1970-11-15 Chemical Construction Corp Verfahren zur Herstellung von Harnstoff aus Ammoniak und Kohlendioxyd
US3954861A (en) * 1968-02-05 1976-05-04 Snamprogetti S.P.A Process for producing urea
DE1800755A1 (de) * 1968-10-03 1970-06-11 Union Rheinische Braunkohlen Verfahren zur Verhinderung der Korrosion durch Syntheseprodukte in Anlagen zur Synthese von Harnstoff
US3574738A (en) * 1968-12-26 1971-04-13 Ivo Mavrovic Process of synthesizing urea
NL164328C (nl) * 1970-04-02 1980-12-15 Stamicarbon Werkwijze voor het verhogen van de weerstand tegen cor- rosie van austenitische chroom-nikkelstalen, alsmede werkwijze voor de bereiding van ureum in apperatuur waarvan de weerstand tegen corrosie aldus is verhoogd.
IL36465A (en) * 1970-04-02 1974-07-31 Zardi U Process for the production of urea
SU739047A1 (ru) * 1977-01-03 1980-06-05 Предприятие П/Я В-8585 Способ разделени углеводородных смесей
SE446978B (sv) * 1977-05-05 1986-10-20 Montedison Spa Isobariskt dubbelatercirkulationsforfarande for syntetisering av urea under bildning av ammoniumkarbamat som mellanprodukt
JPS542380U (es) * 1977-06-07 1979-01-09
IT1174366B (it) * 1978-07-24 1987-07-01 Ortu Francesco Decompositore di carbammato per produzione industriale di urea
JPS5811432B2 (ja) * 1979-10-08 1983-03-02 三井東圧化学株式会社 尿素合成法
JPS56128749A (en) * 1980-03-13 1981-10-08 Mitsui Toatsu Chem Inc Stripping of unreacted material in urea preparation process
IT1141030B (it) * 1980-08-29 1986-10-01 Snam Progetti Procedimento per la produzione di urea
US4311856A (en) * 1980-12-31 1982-01-19 Toyo Engineering Corp. Process for synthesizing urea

Also Published As

Publication number Publication date
EP0096151A1 (en) 1983-12-21
ES8403531A1 (es) 1984-04-01
ES519891A0 (es) 1984-04-01
US4758311A (en) 1988-07-19
PT76639A (en) 1983-06-01
CA1211689A (en) 1986-09-23
PT76639B (en) 1986-01-27
EP0096151B1 (en) 1986-07-23
AR240839A1 (es) 1991-02-28
DE3364579D1 (en) 1986-08-28
BR8301109A (pt) 1983-11-22

Similar Documents

Publication Publication Date Title
AR240839A2 (es) Metodo para evitar la corrosion de los separadores en las plantas de fabricacion de urea.
CN1326767C (zh) 使用氨除去NOx、Hg和SO2的方法
US3826815A (en) Recovery of residual ammonia from weak aqueous solutions thereof
BR0314941B1 (pt) solução de peróxido de hidrogênio aquosa, seu processo de preparação e seu uso.
DE2818950B2 (de) Verfahren zur Aufarbeitung von Harnstoff enthaltendem Abwasser, insbesondere aus Harnstofferzeugungsanlagen
ES2082063T5 (es) Procedimiento para decapar y pasivar acero inoxidable en ausencia de acido nitrico.
KR830007109A (ko) 요소, 암모니아, 이산화탄소를 함유한 묽은 수용액으로 부터요소, 암모니아, 이산화탄소를 제거하는 방법
BR112019010464B1 (pt) Método para remover micro-organismos e depósitos minerais em um sistema de membrana
MX9405126A (es) Recuperacion de acido citrico a partir de corrientes de proceso impuras,por adicion de acidos fuertes y sus sales.
PE20020211A1 (es) Proceso y aparato para la produccion biologica de acido sulfurico
DE2304585A1 (de) Verfahren zur entfernung von sotief 2
ES2186955T3 (es) Procedimiento de preparacion de acido carboxilico aromatico.
CL2018002551A1 (es) Proceso de adsorción por cambios de temperatura
RS53943B1 (en) PROCEDURE FOR MONITORING AND CONTROL OF CHEMISTRY OF ZLD PROCESSES IN POWER PLANTS
EP3332859B1 (de) Verfahren und vorrichtung zum reinigen stickoxidhaltiger gasströme
JP3229903U (ja) シリコン材料の切断補助装置および切断システム
JP4199394B2 (ja) チオ硫酸塩脱硝法における吸収液濃度の制御方法
DE102015014185A1 (de) Verfahren zur Herstellung von Peroxosalpetersäure
JP2000140575A (ja) 湿式脱硝方法
AU2022201729A1 (en) Amine-containing water concentration system and apparatus, and carbon dioxide recovery system
IT1157946B (it) Metodo per eliminare la corrosione delle apparecchiature di strippaggio usate negli impianti per la produzione di urea
CA3210431A1 (en) Method and device for producing ammonium bicarbonate in ammonia-based decarbonization system
DE1950603A1 (de) Verfahren zur kontinuierlichen Entfernung von stoerenden Anionen aus alkalischen Waschloesungen
UA131796U (uk) Спосіб знищення та контролю життєдіяльності амброзії полинолистої
ES2101928T3 (es) Procedimiento para la purificacion de etalfluralina.