Hydrolysis of Esters with Polymer Sulfonic Acid

III. Hydrolysis of Aliphatic Esters with Various Polymer Sulfonic Acids

Abstract

The hydrolysis of aliphatic esters with various polymer sulfonic acids was carried out. In aqueous solutions vinyl-sulfonic acid-styrene copolymer was a more active catalyst than hydrochloric acid, and the activity was nearly as great as that of polystyrene sulfonic acid. Polyvinylbutyral sulfonic acid and vinylsulfonic acid-vinylalcohol copolymer, however, showed no greater catalytic activity than hydrochloric acid. The catalytic activity of polystyrene sulfonic acids depended on their preparation methods. Partial neutralization of polystyrene sulfonic acids with quaternary ammonium hydroxides reduced the catalytic activity of theremaining hydrogen ions. In aqueous acetone such a difference between the activities of polymer sulfonic acids was not found. Some discussions were given for the results.