Polyvinylpolypyrrolidone Supported Brønsted Acidic Catalyst for Esterification

Table 4

Esterification of different alcohols and carboxylic acids in PVPP-BS.

Entry	Acids	Alcohols	Temp. (°C)	Conv.	Sel.
1	Acetic acid	n-Butanol	90	99.6	100
2	Acetic acid	n-Hexanol	92	99.1	100
3	Acetic acid	n-Octanol	92	95.4	100
4	Propionic acid	Isobutanol	91	99.3	100
5	n-Butyric acid	n-Butanol	94	93.8	100
6	Oleic acid	n-Butanol	92	95.6	100
7	Acetic acid	Benzyl alcohol	89	99.1	100
8	Propionic acid	Benzyl alcohol	90	93.2	100

Alcohol (96 mmol); carboxylic acid (80 mmol); and PVPP-BSHSO₄ (8 wt%), for 3 h.
Conversion of acetic acid.
Selectivity for ester.