Patent ID: 7153811

Claim:
A multi-component catalyst structure for the polycondensation of a polyester monomer comprising the element germanium in an amount of from 1 part per million to 200 parts per million, and one or more catalyst enhancers selected from the group of elements consisting of aluminum in an amount from 1 part per million to 400 parts per million, silicon in an amount from 1 part per million to 400 parts per million, molybdenum in an amount from 1 part per million to 200 parts per million, manganese in an amount from 1 part per million to 400 parts per million, lithium in an amount from 1 part per million to 200 parts per million and combinations thereof, except for a combination of germanium and lithium, said elements being in the form of polycondensation compatible elements, compounds, acids, bases, salts, compositions, oxides or organic complexes.