IT959635B - PROCESS FOR MANUFACTURING COLORLESS PYROMELLITIC ACID - Google Patents

PROCESS FOR MANUFACTURING COLORLESS PYROMELLITIC ACID

Info

Publication number
IT959635B
IT959635B IT2348272A IT2348272A IT959635B IT 959635 B IT959635 B IT 959635B IT 2348272 A IT2348272 A IT 2348272A IT 2348272 A IT2348272 A IT 2348272A IT 959635 B IT959635 B IT 959635B
Authority
IT
Italy
Prior art keywords
pyromellitic acid
colorless
manufacturing
manufacturing colorless
pyromellitic
Prior art date
Application number
IT2348272A
Other languages
Italian (it)
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
Application granted granted Critical
Publication of IT959635B publication Critical patent/IT959635B/en

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
    • C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
IT2348272A 1971-04-26 1972-04-22 PROCESS FOR MANUFACTURING COLORLESS PYROMELLITIC ACID IT959635B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH467971A CH539597A (en) 1971-04-26 1971-04-26 Process for the production of colorless pyromellitic acid

Publications (1)

Publication Number Publication Date
IT959635B true IT959635B (en) 1973-11-10

Family

ID=4280583

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2348272A IT959635B (en) 1971-04-26 1972-04-22 PROCESS FOR MANUFACTURING COLORLESS PYROMELLITIC ACID

Country Status (4)

Country Link
BE (1) BE781730A (en)
CH (1) CH539597A (en)
FR (1) FR2134513A1 (en)
IT (1) IT959635B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015988A1 (en) * 1980-04-25 1981-11-05 Akzo Gmbh, 5600 Wuppertal METHOD FOR PRODUCING OR PURIFICATION OF DI- AND POLYCARBONIC ACID ANHYDRIDES
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
FR2134513B1 (en) 1975-06-20
BE781730A (en) 1972-07-31
FR2134513A1 (en) 1972-12-08
CH539597A (en) 1973-07-31

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