A MOLDING COMPRISING A ZEOLITIC MATERIAL HAVING FRAMEWORK TYPE MFI

Abstract

A molding, comprising a zeolitic material having framework type MFI wherein from 98 to 100 weight-% of the zeolitic material consist of Ti, Si, O, and H, and wherein the zeolitic material having framework type MFI exhibits a type IV nitrogen adsorption/desorption isotherm, the molding further comprising a silica binder, wherein the molding has a pore volume of at least 0.8 mL/g.

Claims

1.-15. (canceled)

16. A molding, comprising a zeolitic material having framework type MFI wherein from 98 to 100 weight-% of the zeolitic material consist of Ti, Si, O, and H, and wherein the zeolitic material having framework type MFI exhibits a type IV nitrogen adsorption/desorption, the molding further comprising a silica binder, wherein the molding has a pore volume of at least 0.8 mL/g determined by intrusion mercury porosimetry.

17. The molding of claim 16, wherein the zeolitic material having framework type MFI comprises hollow cavities having a diameter of greater than 5.5 Angstrom, determined via TEM.

18. The molding of claim 16, wherein from 99 to 100 weight % of the zeolitic material having framework type MFI consist of Ti, Si, O, and H.

19. The molding of claim 16, wherein from 99.9 to 100 weight %, of the zeolitic material having framework type MFI consist of Ti, Si, O, and H.

20. The molding of claim 16, wherein the zeolitic material having framework type MFI has a Ti content in the range of from 1.3 to 2.1 weight %, calculated as elemental Ti and based on the weight of zeolitic material.

21. The molding of claim 16, wherein the pore volume is in the range of from 0.8 to 1.5 mL/g,

22. the molding of claim 16, wherein the pore volume is in the range of from 1.0 to 1.3 mL/g.

23. The molding of claim 16, wherein in the molding, the weight ratio of the zeolitic material having framework type MFI relative to the silica binder calculated as SiO.sub.2, MFI:SiO.sub.2, is in the range of from 1:1 to 5:1,

24. The molding of claim 16, wherein in the molding, the weight ratio of the zeolitic material having framework type MFI relative to the silica binder calculated as SiO.sub.2, MFI:SiO.sub.2, is in the range of from 2:1 to 3:1.

25. The molding of any one of claim 16, wherein from 99 to 100 weight %, of the molding consist of the zeolitic material having framework type MFI and the silica binder.

26. A process for preparing a molding comprising a zeolitic material having framework type MFI and a silica binder, the molding according to claim 16, the process comprising (i) providing a mixture comprising a silica binder precursor and a zeolitic material having framework type MFI, wherein from 98 to 100 weight % of the zeolitic material consist of Ti, Si, O, and H, and wherein the zeolitic material having framework type MFI exhibits a type IV nitrogen adsorption/desorption isotherm; (ii) shaping the mixture obtained from (i), obtaining a precursor of the molding; (iii) preparing a mixture comprising the precursor of the molding obtained from (ii) and water, and subjecting the mixture to a water treatment under hydrothermal conditions, obtaining a water-treated precursor of the molding; (iv) calcining the water-treated precursor of the molding in a gas atmosphere, obtaining the molding.

27. The process of claim 26, wherein the silica binder precursor is selected from the group consisting of a silica sol, a colloidal silica, a wet process silica, a dry process silica, and a mixture of two or more thereof.

28. The process of claim 26, wherein the mixture prepared according to (i) further comprises one or more viscosity modifying and/or mesopore forming agents, wherein the one or more agents are selected from the group consisting of water, alcohols, organic polymers, and mixtures of two or more thereof, wherein the organic polymers are selected from the group consisting of cellulose derivatives, polyalkylene oxides, polystyrenes, and mixtures of two or more thereof.

29. The process of claim 26, wherein in (ii), the mixture is shaped to a strand, the strand having a circular cross-section, wherein in (ii), shaping comprises extruding the mixture.

30. The process of claim 26, wherein shaping according to (ii) further comprises drying the precursor of the molding in a gas atmosphere and calcining the dried precursor of the molding in a gas atmosphere, at a temperature of the gas atmosphere in the range of from 450 to 530° C.

31. The process of claim 26, wherein shaping according to (ii) further comprises drying the precursor of the molding in a gas atmosphere and calcining the dried precursor of the molding in a gas atmosphere, at a temperature of the gas atmosphere in the range of from 480 to 500° C.

32. The process of claim 26, wherein the water treatment according to (iii) comprises a temperature of the mixture in the range of from 100 to 200° C. wherein the water treatment according to (iii) is carried out under autogenous pressure.

33. The process of claim 26, wherein the water treatment according to (iii) comprises a temperature of the mixture in the range of from 140 to 150° C., wherein the water treatment according to (iii) is carried out under autogenous pressure.

34. An absorbent, adsorbent, catalyst, or catalyst component comprising the composition according to claim 16.

35. The catalyst or catalyst component of claim 34, wherein the catalyst or catalyst component is a Lewis acid catalyst or a Lewis acid catalyst component, an isomerization catalyst or an isomerization catalyst component, an oxidation catalyst or an oxidation catalyst component, an aldol condensation catalyst or an aldol condensation catalyst component, or a Prins reaction catalyst or a Prins reaction catalyst component.

Description

BRIEF DESCRIPTION OF FIGURES

[0327] FIG. 1: shows the catalytic performance of the moldings of the present invention for according to Example 1.2 (solid lines) relative to the moldings of Comparative Example 3 (dotted lines), in particular the propylene selectivities relative to hydrogen peroxide (dark grey) and relative to propene (light grey). The lower solid black line shows the hydrogen peroxide conversion, the upper solid black line shows the temperature of the cooling medium flowing through the jacket of the reactor.

[0328] FIG. 2: shows the catalytic performance of the moldings of the present invention for according to Example 1.2 (solid lines) relative to the moldings of Comparative Example 3 (dotted lines), in particular the selectivities of oxygen, hydroxyacetone, hydroperoxides, 1-methoxy-2-propanol and 2-methoxy-1-propanol.

CITED LITERATURE

[0329] M. Liu et al.: “Green and efficient preparation of hollow titanium silicalite-1 by using recycled mother liquid” in Chemical Engineering Journal 2018, vol. 331, p. 194-202 [0330] J. Xu et al.: “Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation” in Frontiers of Chemical Science and Engineering 2014, vol. 8(4), p. 478-487 [0331] M. Liu et al. “Highly Selective Epoxidation of Propylene in a Low-Pressure Continuous Slurry Reactor and the Regeneration of Catalyst” in Industrial+Engineering Chemistry Research 2015, vol. 54(20), p. 5416-5426 [0332] CN 108250161 A [0333] CN 103708493 A