ES468499A1 - Un procedimiento para la recuperacion de catalizadores y di-solventes en un metodo para la obtencion de acido tereftali-co - Google Patents

Un procedimiento para la recuperacion de catalizadores y di-solventes en un metodo para la obtencion de acido tereftali-co

Info

Publication number
ES468499A1
ES468499A1 ES468499A ES468499A ES468499A1 ES 468499 A1 ES468499 A1 ES 468499A1 ES 468499 A ES468499 A ES 468499A ES 468499 A ES468499 A ES 468499A ES 468499 A1 ES468499 A1 ES 468499A1
Authority
ES
Spain
Prior art keywords
oxidation
acetic acid
mother
water
partially
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
ES468499A
Other languages
English (en)
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.)
Montedison SpA
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
Priority claimed from IT2205877A external-priority patent/IT1075688B/it
Priority claimed from IT22408/77A external-priority patent/IT1075317B/it
Application filed by Montedison SpA filed Critical Montedison SpA
Publication of ES468499A1 publication Critical patent/ES468499A1/es
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
    • 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
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Un procedimiento para la recuperación de catalizadores y disolventes en un método para la obtención de ácido tereftálico, esencialmente del tipo que comprende la oxidación de para-xileno en solución de ácido acético y en presencia de un sistema catalítico a base de manganeso, cobalto y bromo, con lo que se forma agua durante la oxidación, siendo la cantidad de agua en la mezcla de oxidación líquida inferior al 10% en peso con respecto al ácido acético, con lo que se separa ácido tereftálico sólido de las aguas madres y con lo que se extrae de la zona de oxidación un líquido que se obtiene condensando los vapores liberados durante la oxidación y que está constituido, fundamentalmente, por ácido acético y agua; caracterizado porque comprende reducir la cantidad de sólidos suspendidos en las aguas madres a menos del 0,30% y de preferencia a menos del 0,05% en peso, con respecto a las aguas madres, y porque sucesivamente dichas aguas madres se anhidrifican parcialmente, por medio de una destilación para reducir la cantidad de agua en las aguas madres parcialmente anhidrificadas por debajo de, por lo menos, el 5% en peso, con respecto al ácido acético, con lo que una porción del licor parcialmente anhidrificado, conteniendo por lo menos el 50% del sistema catalítico, presente en las aguas madres originales, se recicla a la zona de oxidación, alimentándose la porción restante del licor parcialmente anhidrificado como una purga a los tratamientos usuales para la separación y la regeneración del catalizador.
ES468499A 1977-04-04 1978-04-03 Un procedimiento para la recuperacion de catalizadores y di-solventes en un metodo para la obtencion de acido tereftali-co Expired ES468499A1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2205877A IT1075688B (it) 1977-04-04 1977-04-04 Metodo per il recupero del catalizzatore e del solvente dal liquido madre di un processo per la sintesi dell'acido tereftalico
IT22408/77A IT1075317B (it) 1977-04-13 1977-04-13 Metodo per l'anidrificazione del solvente e per il ricupero del sottoprodotto acetato di metile in un processo di sintesi dell'acido tereftalico

Publications (1)

Publication Number Publication Date
ES468499A1 true ES468499A1 (es) 1979-01-01

Family

ID=26328080

Family Applications (1)

Application Number Title Priority Date Filing Date
ES468499A Expired ES468499A1 (es) 1977-04-04 1978-04-03 Un procedimiento para la recuperacion de catalizadores y di-solventes en un metodo para la obtencion de acido tereftali-co

Country Status (10)

Country Link
JP (1) JPS53127430A (es)
BR (1) BR7802069A (es)
DE (1) DE2814448A1 (es)
ES (1) ES468499A1 (es)
FR (1) FR2386511A1 (es)
GB (1) GB1593117A (es)
IN (1) IN148106B (es)
MX (1) MX148713A (es)
NL (1) NL188282C (es)
SU (1) SU1217250A3 (es)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1129759B (it) * 1980-01-23 1986-06-11 Montedison Spa Metodo per ricuperare in forma attiva i componenti del sistema catalitico della sintesi dell'acido tereftalico
US4334086A (en) * 1981-03-16 1982-06-08 Labofina S.A. Production of terephthalic acid
AU3188595A (en) * 1994-08-23 1996-03-14 E.I. Du Pont De Nemours And Company Dehydration of acetic acid by azeotropic distillation in the production of an aromatic acid
US6150553A (en) * 1998-08-11 2000-11-21 E. I. Du Pont De Nemours And Company Method for recovering methyl acetate and residual acetic acid in the production acid of pure terephthalic acid
WO2002068083A1 (fr) * 2001-02-27 2002-09-06 Mitsubishi Chemical Corporation Methode de distillation azeotropique
US7572936B2 (en) 2004-09-02 2009-08-11 Eastman Chemical Company Optimized liquid-phase oxidation
US7381836B2 (en) 2004-09-02 2008-06-03 Eastman Chemical Company Optimized liquid-phase oxidation
US7568361B2 (en) 2004-09-02 2009-08-04 Eastman Chemical Company Optimized liquid-phase oxidation
US7741515B2 (en) 2004-09-02 2010-06-22 Eastman Chemical Company Optimized liquid-phase oxidation
US7910769B2 (en) 2004-09-02 2011-03-22 Eastman Chemical Company Optimized liquid-phase oxidation
US7589231B2 (en) 2004-09-02 2009-09-15 Eastman Chemical Company Optimized liquid-phase oxidation
US7692036B2 (en) 2004-11-29 2010-04-06 Eastman Chemical Company Optimized liquid-phase oxidation
US7504535B2 (en) 2004-09-02 2009-03-17 Eastman Chemical Company Optimized liquid-phase oxidation
US7692037B2 (en) 2004-09-02 2010-04-06 Eastman Chemical Company Optimized liquid-phase oxidation
US7683210B2 (en) 2004-09-02 2010-03-23 Eastman Chemical Company Optimized liquid-phase oxidation
US7507857B2 (en) 2004-09-02 2009-03-24 Eastman Chemical Company Optimized liquid-phase oxidation
US7361784B2 (en) * 2004-09-02 2008-04-22 Eastman Chemical Company Optimized liquid-phase oxidation
US7582793B2 (en) 2004-09-02 2009-09-01 Eastman Chemical Company Optimized liquid-phase oxidation
US7884232B2 (en) 2005-06-16 2011-02-08 Eastman Chemical Company Optimized liquid-phase oxidation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE670307A (es) * 1964-12-14 1900-01-01
US3557173A (en) * 1968-05-09 1971-01-19 Sinclair Research Inc Process for recovering cobalt acetate
DE2104909A1 (en) * 1971-02-03 1972-09-07 Chemische Fabrik Kalk GmbH, 5000 Köln Terephthalic acid prodn - by para-xylene oxidn with oxygen using cobalt and bromine compound catalysts
US3761474A (en) * 1971-03-22 1973-09-25 Fmc Corp Purification of crude cyanuric acid
JPS5328420B2 (es) * 1973-04-05 1978-08-15
JPS5328421B2 (es) * 1973-05-15 1978-08-15
JPS5328901B2 (es) * 1973-07-28 1978-08-17
FR2304255A7 (fr) * 1975-03-13 1976-10-08 Inst Francais Du Petrole Procede de fabrication d'acide terephtalique par oxydation du paraxylene

Also Published As

Publication number Publication date
JPS53127430A (en) 1978-11-07
IN148106B (es) 1980-10-18
JPS6241219B2 (es) 1987-09-02
GB1593117A (en) 1981-07-15
DE2814448A1 (de) 1978-10-12
MX148713A (es) 1983-06-06
NL188282B (nl) 1991-12-16
NL188282C (nl) 1992-05-18
BR7802069A (pt) 1979-01-23
SU1217250A3 (ru) 1986-03-07
DE2814448C2 (es) 1991-05-23
NL7803368A (nl) 1978-10-06
FR2386511B1 (es) 1980-07-25
FR2386511A1 (fr) 1978-11-03

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