ES470322A2 - Process for the synthesis of terephthalic acid - Google Patents

Process for the synthesis of terephthalic acid

Info

Publication number
ES470322A2
ES470322A2 ES470322A ES470322A ES470322A2 ES 470322 A2 ES470322 A2 ES 470322A2 ES 470322 A ES470322 A ES 470322A ES 470322 A ES470322 A ES 470322A ES 470322 A2 ES470322 A2 ES 470322A2
Authority
ES
Spain
Prior art keywords
bromine
mother liquor
manganese
cobalt
anhydrified
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
ES470322A
Other languages
Spanish (es)
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
Application filed by Montedison SpA filed Critical Montedison SpA
Publication of ES470322A2 publication Critical patent/ES470322A2/en
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
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective 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)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

1. Improvements in the object of the main patent no. 468.499, by "a procedure for the recovery of catalysts, and solvents in a method for obtaining terephthalic acid, comprising the oxidation of paraxylene in acetic acid solution and in the presence of a system catalytic based on manganese and bxomo and cobalt, where the bromine is added elemental bromine cone and wherein the synthesized solid texephthalic acid is separated from the mother liquor, at least a portion of said partially anhydrified mother liquor, characterized in that said improvements include: A) preparing the catalyst system by contacting acetic acid, manganese or manganese compounds, elemental bromine and a soluble cobalt compound, wherein the addition of elemental bromine is carried out in the presence of my reducing compound; B) feeding the catalyst system obtained according to a) and containing manganous, bromine and cobalt in dissolved form, to the oxidation zone, optionally in combination with the paraxylene feed and/or with at least a portion of the partially anhydrified mother liquor . (Machine-translation by Google Translate, not legally binding)
ES470322A 1977-07-26 1978-05-30 Process for the synthesis of terephthalic acid Expired ES470322A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT26113/77A IT1080758B (en) 1977-07-26 1977-07-26 METHOD FOR PREPARING THE CATALYST IN A TEREPHTHALIC ACID SYNTHESIS PROCESS

Publications (1)

Publication Number Publication Date
ES470322A2 true ES470322A2 (en) 1980-08-16

Family

ID=11218660

Family Applications (1)

Application Number Title Priority Date Filing Date
ES470322A Expired ES470322A2 (en) 1977-07-26 1978-05-30 Process for the synthesis of terephthalic acid

Country Status (8)

Country Link
JP (1) JPS5439038A (en)
CA (1) CA1113957A (en)
DE (1) DE2823504A1 (en)
ES (1) ES470322A2 (en)
FR (1) FR2398716A2 (en)
GB (1) GB1604930A (en)
IT (1) IT1080758B (en)
NL (1) NL7805739A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW360636B (en) * 1993-07-12 1999-06-11 Glitsch Method and apparatus for recovering acetic acid from aqueous streams

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2154147C3 (en) * 1970-11-01 1978-03-16 Maruzen Oil Co., Ltd., Osaka (Japan) Process for the production of terephthalic acid
JPS5328901B2 (en) * 1973-07-28 1978-08-17
FR2307787A1 (en) * 1975-04-14 1976-11-12 Inst Francais Du Petrole PROCESS FOR MANUFACTURING TEREPHTHALIC ACID BY OXIDATION OF PARAXYLENE

Also Published As

Publication number Publication date
DE2823504A1 (en) 1979-02-15
CA1113957A (en) 1981-12-08
IT1080758B (en) 1985-05-16
NL7805739A (en) 1979-01-30
DE2823504C2 (en) 1989-08-31
FR2398716B2 (en) 1983-07-08
GB1604930A (en) 1981-12-16
FR2398716A2 (en) 1979-02-23
JPS5439038A (en) 1979-03-24

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