ACIDIC CESIUM SALTS OF KEGGIN-TYPE HETEROPOLYTUNGSTIC ACIDS AS INSOLUBLE SOLID ACID CATALYSTS FOR ESTERIFICATION AND HYDROLYSIS REACTIONS

Authors
IZUMI Y ONO M OGAWA M URABE K
Citation
Y. Izumi et al., ACIDIC CESIUM SALTS OF KEGGIN-TYPE HETEROPOLYTUNGSTIC ACIDS AS INSOLUBLE SOLID ACID CATALYSTS FOR ESTERIFICATION AND HYDROLYSIS REACTIONS, Chemistry Letters, (5), 1993, pp. 825-828
Citations number
11
Categorie Soggetti
Chemistry
Journal title
Chemistry Letters → ACNP
ISSN journal
03667022
Issue
5
Year of publication
1993
Pages
825 - 828
Database
ISI
SICI code
0366-7022(1993):5<825:ACSOKH>2.0.ZU;2-C
Abstract
Acidic cesium salts of the Keggin-type heteropolyacids, Cs2.5H0.5PW12O 40 and Cs2.5H1.5SiW12O40, retained their strong acidity in water-conta ining organic media, and worked as insoluble, efficient acid catalysts in the hydrolysis of ethyl acetate and the esterification of acetic a cid with ethanol. Silica-bound Cs2.5H0.5PW12O40, a newly prepared comp osite, was an active and easily recoverable solid acid catalyst for th e hydrolysis of ethyl acetate with excess water.