Heteropoly acids and their derivative salts are also good materials
for alcoholysis. Especially due to their water tolerance potentials,
which significantly limit deactivation by hindering the
conversion of Lewis to Brønsted acid sites. Their super acidity
properties coupled with structural networks promote their degree
of transesterification, compared with homogeneous hydroxides
and acids. They can easily be recycled and reused, thus reducing
production cost and environmental inconsistencies. However, their
specific mechanism of action has not yet been established