ZA722810B - Method of production of pure pyromellitic acid dianhydride - Google Patents

Method of production of pure pyromellitic acid dianhydride

Info

Publication number
ZA722810B
ZA722810B ZA722810A ZA722810A ZA722810B ZA 722810 B ZA722810 B ZA 722810B ZA 722810 A ZA722810 A ZA 722810A ZA 722810 A ZA722810 A ZA 722810A ZA 722810 B ZA722810 B ZA 722810B
Authority
ZA
South Africa
Prior art keywords
production
acid dianhydride
pyromellitic acid
pure
pure pyromellitic
Prior art date
Application number
ZA722810A
Inventor
A Neri
F Roveri
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
Publication of ZA722810B publication Critical patent/ZA722810B/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
    • C07C51/43—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)
ZA722810A 1971-04-26 1972-04-26 Method of production of pure pyromellitic acid dianhydride ZA722810B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH525871A CH540217A (en) 1971-04-26 1971-04-26 Process for the production of pure pyromellitic dianhydride

Publications (1)

Publication Number Publication Date
ZA722810B true ZA722810B (en) 1973-02-28

Family

ID=4290581

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA722810A ZA722810B (en) 1971-04-26 1972-04-26 Method of production of pure pyromellitic acid dianhydride

Country Status (8)

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

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
IT953752B (en) 1973-08-10
ES401989A1 (en) 1975-03-01
FR2134514B1 (en) 1975-06-20
NL7205522A (en) 1972-10-30
CH540217A (en) 1973-08-15
DE2151238A1 (en) 1972-12-21
BE781732A (en) 1972-07-31
FR2134514A1 (en) 1972-12-08

Similar Documents

Publication Publication Date Title
JPS5328141A (en) Production of novel carboxylic acid
IT973803B (en) PROCEDURE FOR PRODUCING DIOXIDE AND SULFURIC ACID
ZA729106B (en) Process of the production of (+)-trans-chrysanthemic acid
CS173597B2 (en) Method of 6-aminopenicillic acid production
CS183696B2 (en) Method for producing derivatives of 3-methyl-delta up3-cephem-4-carboxylic acid
CA980794A (en) Process for the production of (+)-cis-, (+)-trans-mixed chrysanthemic acid
CS183671B2 (en) Method of producing pure e-caprolactame
CA974252A (en) Production of citric acid or citrates
JPS537674A (en) Production of xantone carboxylic acid derivatives
ZA722810B (en) Method of production of pure pyromellitic acid dianhydride
SE394660B (en) PROCEDURE FOR THE PRODUCTION OF SULFURIC ACID
JPS537675A (en) Production of xantonecarboxylic acid derivatives
CS183664B2 (en) Method of producing new derivatives of 4-chlor-5-sulphamoylantranilic acid
EG10897A (en) Process for production of 6-aminopencillanic acid
ZA722811B (en) Method of dehydration of pyromellitic acid
CS179385B2 (en) Method for production of chloroformic acid arylesters
IL39950A0 (en) Process for the production of citric acid
CA975795A (en) Process for the production of trans-chrysanthemic acid
IL38341A0 (en) Process for the manufacture of 2-chloroethane-phosphonic acid
CS193013B2 (en) Method of producing 6-beta-amino-2,2-dimethylpenam-3-alpha-carboxylic acid
CA881566A (en) Production of isocrotonic acid
CA880213A (en) Production of acid
CA867380A (en) Process for the production of bis-carboxylic acid anhydrides
CS182221B2 (en) Method of producing derivatives of 7-amino-cephalosphoric and 6-aminopenicilanic acid
CS179403B2 (en) Method for production of l-aralkyl-2-pyrryl-2-aminoethanols