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CH540217A - Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid - Google Patents

Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid

Info

Publication number
CH540217A
CH540217A CH525871A CH525871A CH540217A CH 540217 A CH540217 A CH 540217A CH 525871 A CH525871 A CH 525871A CH 525871 A CH525871 A CH 525871A CH 540217 A CH540217 A CH 540217A
Authority
CH
Switzerland
Prior art keywords
production
pyromellitic dianhydride
pure
pure pyromellitic
dianhydride
Prior art date
Application number
CH525871A
Other languages
English (en)
Inventor
Neri Amleto
Roveri Fausto Dr Chem
Original Assignee
Prolizenz Ag
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 Prolizenz Ag filed Critical Prolizenz Ag
Priority to CH525871A priority Critical patent/CH540217A/de
Priority to DE19712151238 priority patent/DE2151238A1/de
Priority to BE781732A priority patent/BE781732A/xx
Priority to ES401989A priority patent/ES401989A1/es
Priority to NL7205522A priority patent/NL7205522A/xx
Priority to IT23510/72A priority patent/IT953752B/it
Priority to FR7214716A priority patent/FR2134514A1/fr
Priority to ZA722810A priority patent/ZA722810B/xx
Publication of CH540217A publication Critical patent/CH540217A/de

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
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
CH525871A 1971-04-26 1971-04-26 Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid CH540217A (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CH525871A CH540217A (de) 1971-04-26 1971-04-26 Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid
DE19712151238 DE2151238A1 (de) 1971-04-26 1971-10-14 Verfahren zur Herstellung von reinem Pyromellithsaeuredianhydrid
BE781732A BE781732A (fr) 1971-04-26 1972-04-06 Procede de fabrication du dianhydride pur de l'acide pyromellique
ES401989A ES401989A1 (es) 1971-04-26 1972-04-21 Procedimiento para la fabricacion de dianhidrido piromeli- tico puro.
NL7205522A NL7205522A (de) 1971-04-26 1972-04-24
IT23510/72A IT953752B (it) 1971-04-26 1972-04-24 Procedimento di fabbricazione di anidride dell acido piromelli tico pura
FR7214716A FR2134514A1 (en) 1971-04-26 1972-04-25 Pure pyromellitic dianhydride - from oxidn of tetraalkylbenzene with purification of intermediate pyromellitic acid
ZA722810A ZA722810B (en) 1971-04-26 1972-04-26 Method of production of pure pyromellitic acid dianhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH525871A CH540217A (de) 1971-04-26 1971-04-26 Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid

Publications (1)

Publication Number Publication Date
CH540217A true CH540217A (de) 1973-08-15

Family

ID=4290581

Family Applications (1)

Application Number Title Priority Date Filing Date
CH525871A CH540217A (de) 1971-04-26 1971-04-26 Verfahren zur Herstellung von reinem Pyromellithsäuredianhydrid

Country Status (8)

Country Link
BE (1) BE781732A (de)
CH (1) CH540217A (de)
DE (1) DE2151238A1 (de)
ES (1) ES401989A1 (de)
FR (1) FR2134514A1 (de)
IT (1) IT953752B (de)
NL (1) NL7205522A (de)
ZA (1) ZA722810B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6579990B2 (en) 2000-08-23 2003-06-17 Mitsubishi Gas Chemical Company, Inc. Process for producing refined pyromellitic acid and refined pyromellitic anhydride

Also Published As

Publication number Publication date
ES401989A1 (es) 1975-03-01
NL7205522A (de) 1972-10-30
FR2134514A1 (en) 1972-12-08
IT953752B (it) 1973-08-10
DE2151238A1 (de) 1972-12-21
BE781732A (fr) 1972-07-31
FR2134514B1 (de) 1975-06-20
ZA722810B (en) 1973-02-28

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Legal Events

Date Code Title Description
PL Patent ceased