MICROPOWDER AND MOLDING, WHICH CONTAINS ZEOLITIC MATERIAL, CONTAINING Ti AND Zn

FIELD: chemistry.SUBSTANCE: described micropowder used as catalyst or as intermediate for the preparation of the catalyst, which particles have a Dv10 value of at least 2 micrometer, mentioned micropowder comprises mesopores having an average pore diameter (4V/A) ranging from 2 to 50 nm as determined by Hg porosimetry according to DIN 66133, and contains a micropowder based on the weight of at least 95 wt % Microporous not containing aluminium zeolite MWW structure type material containing titanium and zinc (ZnTiMWW). Micropowder is used as a catalyst or as intermediate for the preparation of the catalyst, preferably for the preparation of propylene oxide from propene with hydrogen peroxide as the oxidant in acetonitrile as solvent. Also, moulded article comprising mentioned micropowder, the moulded article preferably further contains at least one binder, preferably a binder based on silica is disclosed. Applicable moulded article as catalyst, preferably as a catalyst to obtain propylene oxide from propene with hydrogen peroxide as the oxidant in acetonitrile as the solvent in a continuous process in which the selectivity to propylene oxide, relative to hydrogen peroxide after the duration of 500 hours is at least 95%, preferably at least 96%. A method for the preparation of a micropowder is disclosed, comprising: (i) providing a slurry containing a microporous, aluminium-free zeolite-type MWW-type structure containing titanium and zinc (ZnTiMWW); (Ii) exposing the slurry provided in step (i) to spray-drying to obtain a micropowder; (Iii) optionally calcining the micropowder obtained in step (ii) in which the micropowder obtained in step (ii) or (iii), preferably in step (iii), is preferably the above-described micropowder.EFFECT: obtaining micropowder which has an advantageous characteristic in the case of use as an intermediate for the preparation of the catalyst in the form of moulded articles having advantageous properties, preferably for use in epoxidation reactions.41 cl, 27 dwg, 3 tbl, 15 ex Изобретение относится к микропорошку и формованному изделию в качестве катализатора для эпоксидирования пропилена. Описан микропорошок, используемый в качестве катализатора или в качестве промежуточного вещества для получения катализатора, частицы которого имеют значение Dv10, равное по меньшей мере 2 микрометра, причем указанный микропорошок содержит мезопоры, имеющие средний диаметр пор (4V/A) в интервале от 2 до 50 нм, как определено Hg порозиметрией согласно