Method of esterifying benzene carboxylic acid by ethylene glycol
Abstract
Abstract METHOD OF CATALYZED ESTERIFICATION OF BENZENE CARBOXYLIC ACIDS, SUCH AS TEREPHTHALIC ACID, OR MIXTURE THEREOF WITH OTHER AROMATIC, ALIPHATIC AND ALICYCLIC CARBOXYLIC ACIDS USED AS MODIFYING ADDITIVES IN THE PREPARATION OF POLYESTER FIBERS, WHEREIN TO A MIXTURE OF TEREPHTHALIC ACID OR TO A MIXTURE OF ACIDS CONTAINING AN APPROPRIATE AMOUNT OF AN ESTERIFICATION CATALYST AND AN INERT DILUENT, WHICH MIXTURE IS HEATED TO THE BOILING TEMPERATURE UNDER ATMOSPHERIC OR SUPERATMOSPHERIC PRESSURE, ETHYLENE GLYCOL IS ADDED SUCCESSIVELY OR CONTINUOUSLY SO AS TO ENSURE A LOW CONCENTRATION OF FREE GLYCOL IN THE REACTION MIXTURE DURING THE REACTION AND A SUBSTANTIALLY CONSTANT REACTION RATE.
Inventors
- 👤 V Rod
- 👤 L Strnadova
- 👤 Z Sir
- 👤 V Bazant
Bibliographic Details
Claims Analysis
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