| abstract |
The invention relates to a preparation method of a polyester catalyst. The preparation method comprises the following steps: (1) dissolving a titanium-containing compound, a silicon-containing compound and a tin-containing compound into an organic solvent in sequence; and (2) adding acidic or basic aqueous solution into a mixture obtained in the step (1) to hydrolyze, collecting a sediment, centrifuging, washing and drying to obtain the catalyst provided by the invention, that is to say, a coprecipitate of TiO2/SiO2/SnO2. The catalyst has not only an effect on condensation polymerization of polyester, but a remarkable catalytic action on esterification reaction, and the obtained polyester chip is better in hue. |