The invention discloses a
polyester polycondensation catalyst, a preparation method and application thereof. The preparation method comprises the following steps that: 1) a
titanium-containing compound is hydrolyzed in water and / or an alcoholic solution to obtain a TiO2
sol, a
silicon-containing compound is hydrolyzed in the water and / or the alcoholic solution to obtain a SiO2
sol, and the two sols are mixed evenly to obtain a TiO2 / SiO2
sol; and 2) the TiO2 / SiO2 sol and a
nitrogen-containing or
phosphorus-containing compound react to obtain a target product. The method for preparing the
polyester polycondensation catalyst has simple and convenient process, is easy to operate, regulates and controls the activity of a catalytic center Ti through the coordination effect of the
nitrogen-containing or
phosphorus-containing compound with high
thermal stability, remarkably reduces the using amount of the Ti, and fully inhibits the
catalysis effect of the catalyst on a condensation
side reaction and the thermal degradation of
polyester. The catalyst does not need to add a toner during the use, has high
catalytic efficiency, and can be used for catalyzing the
polymerization of aromatic and aliphatic polyesters; and the using amount of the catalyst is greatly reduced and is about 0.0003 to 0.05 percent of the theoretical yield of the polyesters.