GB1112817A - Production of pyromellitic dianhydride - Google Patents

Production of pyromellitic dianhydride

Info

Publication number
GB1112817A
GB1112817A GB426467A GB426467A GB1112817A GB 1112817 A GB1112817 A GB 1112817A GB 426467 A GB426467 A GB 426467A GB 426467 A GB426467 A GB 426467A GB 1112817 A GB1112817 A GB 1112817A
Authority
GB
United Kingdom
Prior art keywords
pyromellitic dianhydride
production
tetraalkylbenzene
durene
condensing
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
GB426467A
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.)
Princeton Chemical Research Inc
Original Assignee
Princeton Chemical Research Inc
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 Princeton Chemical Research Inc filed Critical Princeton Chemical Research Inc
Publication of GB1112817A publication Critical patent/GB1112817A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

Pyromellitic dianhydride is made by vapour phase catalytic oxidation of a tetraalkylbenzene (e.g. durene) and condensing the exit gas at a cooling rate of 10-10,000 DEG F/sec., so as to give a particle size above 1 micron.
GB426467A 1966-05-31 1967-01-27 Production of pyromellitic dianhydride Expired GB1112817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55369766A 1966-05-31 1966-05-31

Publications (1)

Publication Number Publication Date
GB1112817A true GB1112817A (en) 1968-05-08

Family

ID=24210378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB426467A Expired GB1112817A (en) 1966-05-31 1967-01-27 Production of pyromellitic dianhydride

Country Status (3)

Country Link
DE (1) DE1618786A1 (en)
GB (1) GB1112817A (en)
NL (1) NL6703238A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746081A1 (en) * 2005-07-21 2007-01-24 Mitsubishi Gas Chemical Company Inc. Production method of highly pure pyromellitic dianhydride

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746081A1 (en) * 2005-07-21 2007-01-24 Mitsubishi Gas Chemical Company Inc. Production method of highly pure pyromellitic dianhydride
US7569707B2 (en) 2005-07-21 2009-08-04 Mitsubishi Gas Chemical Company, Inc. Production method of highly pure pyromellitic dianhydride
CN1970560B (en) * 2005-07-21 2010-09-29 三菱瓦斯化学株式会社 Method for producing high-purity pyromellitic dianhydride

Also Published As

Publication number Publication date
DE1618786A1 (en) 1971-05-27
NL6703238A (en) 1967-12-01

Similar Documents

Publication Publication Date Title
JPS5239639A (en) Process for preparation of decabromobiphenylether
FR1325121A (en) Improvements to processes for the production of acetylene by thermal decomposition of hydrocarbons
GB1112817A (en) Production of pyromellitic dianhydride
GB1066148A (en) Purification of pyromellitic dianhydride
JPS5227743A (en) Production of high-purity terephthalic acid
FR1474891A (en) Apparatus ensuring the continuous purification of a gas by crystallization
ES350276A1 (en) Process for the Preparation of Sulphur Hexafluoride
ES397692A1 (en) Active aluminium oxide and process fof producing same
BE765527A (en) PROCESS FOR THE PRODUCTION OF ACETIC ACID BY GAS PHASE OXIDATION
JPS5325508A (en) Production of glycols
ES401989A1 (en) Procedure for the manufacture of pure piromelitic dianhydride. (Machine-translation by Google Translate, not legally binding)
JPS5267838A (en) High frequency heater
JPS5213621A (en) Cooling transformer
GB1028488A (en) Improvements in or relating to the oxidation of cyclododecane
GB1038340A (en) Process for the production of pyrethic acid
JPS51128947A (en) Process for producing j-methyl-2,4-bis- (p-hydroxyphenyl)-pentane
GB1036330A (en) A process for the recovery of naphthoquinone formed in the catalytic vapor phase oxidation of naphthalene
JPS51137691A (en) Ozone generating apparatus
GB1238193A (en)
JPS5253805A (en) Preparation of hexafluoropropylene epoxide
GB1108353A (en) Manufacture of dihydropyranyl esters in a continuous manner
GB1064384A (en) Process for the preparation of pure formaldehyde
GB1024732A (en) Benzanthronyl-pyrazoleanthrones and process for their manufacture
JPS5247595A (en) Apparatus for ozone production
GB987382A (en) Improved process for the production of monochlorobenzene