A composition that can be used as a catalyst is disclosed. The composition comprises,
or is produced by combining, a titanium compound, a glycol, a phosphorus compound,
and optionally water. Also disclosed is a process that can be used for producing
a polyester. The process comprises contacting, in the presence of a catalyst composition,
a carbonyl compound and an alcohol under a condition suitable for esterification,
transesterification, or polymerization. The catalyst composition comprises, or
is produced by combining, a titanium compound, a glycol, a phosphorus compound,
and optionally water.
