Method for producing a catalytic preparation and use of said catalytic preparation

Abstract

The invention relates to a method for producing a catalytic preparation, according to which the catalyst, which contains at least one inorganic compound that is solid in normal conditions, is comminuted using a dispersing aggregate into particles with a maximum average particle size d50.3 of 2 mu m, preferably a maximum 1 mu m, conforming to DIN 66141 and 66144 and is then dispersed in a liquid in a concentration of between 1 and 50 wt. %, (in relation to the finished catalytic preparation).

Description

technical field [0001] The present invention relates to a method of producing a catalyst preparation and its use. Background technique [0002] Solid catalysts are often used in the production of polyesters. Such catalysts can be, for example, TiO 2 or by TiO 2 derived compounds. For example, EP 0736560 describes a catalyst comprising an alkali metal titanate or an alkaline earth metal carbonate. [0003] In heterogeneous catalysis, the catalyst is insoluble in the reaction medium but exists as a separate solid phase. In one embodiment concerning such catalysis, the catalyst is maintained as a separate solid phase within the system. In some cases, for example, in the catalysis of an esterification process, the catalyst is added as a powder, but it dissolves during the reaction. Here, a continuous transition from heterogeneous to homogeneous catalysis occurs. [0004] The distribution of the catalyst in the reaction medium greatly affects the reaction progress. [000...

AI Technical Summary

Problems solved by technology

In addition to the disadvantage of settling to very densely packed precipitates, which can hardly be settled by stirring, another disadvantage of such systems is that they often contain undesirable auxiliary substances (polymeric wetting and dispersing agents)

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