ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Gas chromatography of methyl esters of aromatic mono-, di-, and tricarboxylic acids formed during oxidation of a mixture of trimethylbenzenes

M. Hronec, J. Krupčík, and J. Baxa

Department of Chemistry and Technology of Petroleum, Slovak Technical University, 88O 37 Bratislava

Abstract: Relative elution time of six methyl dimethylbenzoates, five isomeric methylphthalic acids and three isomeric benzenetricarboxylic acids was estimated on packed and capillary columns. Apiezon L, QF-1, Reoplex-400 and ethylene glycol succinate + 2% H₃PO₄ at 140—214°C were the liquid phases in the packed columns, Apiezon К and Reoplex-400 at 209 and 168°C, respectively in the capillary ones. It has been found that no satisfactory separation of all theoretically possible isomeric methyl dimethylbenzoates took place at any of the packed columns; isomeric methyl methylphthalates were well separated on 10% ethylene glycol succinate + 2 % H₃PO₄; a good separation of all isomeric methyl dimethylbenzoates and methyl phthalates was achieved on a 45-m Reoplex capillary column at 168°C.

Full paper in Portable Document Format: 271a135.pdf

Chemical Papers 27 (1) 135–140 (1973)