Abstract: Disclosed is a method for producing a titanium containing catalyst, wherein the catalyst includes one or more titanium alpha-hydroxy carboxylate species, e.g., titanium citrate, and one or more titanium oxide species, e.g., TiOx, wherein x is greater than 0 and less than or equal to 2, wherein the sum of all of the above titanium oxide species relative to the sum of all titanium alpha-hydroxy carboxylate species in the titanium containing catalyst is greater than 0 but less than 1.00 mol.-%. The method of production involves, for example, reacting tetraisopropyl orthotitanate with an aqueous solution of citric acid, and removing the byproduct of 2-propanol by distillation. Also disclosed is a method for the production of polyesters by the use of the catalyst.

Abstract: The present invention is directed to a method for the production of a titanium containing catalyst, wherein a titanium-(IV)-alkoxide of high purity is reacted with an alpha-hydroxy carboxylic acid. Furthermore the invention concerns a titanium containing catalyst allowing for the production of high viscosity polyesters with high thermal stability. In addition, the invention is directed to a method for the production of polyesters and polyesters themselves.

Abstract: A composition has an empirical formula M (glycerol) a (X) b, where M represents a metal atom selected from titanium, zirconium, hafnium or aluminium, X is a ligand derived from acetylacetone or a peroxo ion; a is a number between 1 and 2. 5; b is a number in the range from 1 to 2. An alternative composition results from the reaction of a compound of titanium, zirconium, hafnium or aluminium with (a) glycerol and (b) either: (i) acetylacetone or (ii) hydrogen peroxide, an inorganic base and water. The composition is useful in applications requiring water-stable metal chelates, particularly as a catalyst for esterification and polyurethane reactions.

Abstract: The invention provides a method of making a polymer in the presence of a catalyst composition having an empirical formula M(glycerol)a(X)b, where M represents a metal atom selected from titanium, zirconium, hafnium or aluminium, X is a ligand derived from acetylacetone or a peroxo ion; a is a number between 1 and 2.5; b is a number in the range from 1 to 2. Reactive compositions containing the catalyst composition are also described.