ZEOLITIC MATERIAL HAVING A FRAMEWORK STRUCTURE COMPRISING SI, O, AND TI

Abstract

The present invention relates to a zeolitic material having a framework structure comprising Si, O, and Ti, obtained or obtainable from a Ti containing compound, wherein the Ti containing compound has an APHA color number of ≤ 300. In a second aspect, the invention relates to the Ti containing compound having an APHA color number of ≤ 300. A third aspect of the present invention is related to the use of the Ti containing compound having an APHA color number of ≤ 300 of the second aspect for the preparation of a zeolitic material having framework structure comprising Si, O, and Ti, as well as to a process for preparation of a zeolitic material as in the first aspect having a framework structure comprising Si, O, and Ti, wherein the zeolitic material having a framework structure comprising Si, O, and Ti, is prepared from a Ti containing compound having an APHA color number of ≤ 300 as of the second aspect. A fourth aspect of the invention is directed to a molding comprising the zeolitic material having a framework structure comprising Si, O, and Ti as of the first aspect, as well as to the use of the molding as an adsorbent, an absorbent, a catalyst or a catalyst component. A fifth aspect of the invention relates to a process for oxidizing an organic compound comprising bringing an organic compound in contact with a catalyst comprising a molding as of the fourth aspect, wherein a sixth aspect relates to propylene oxide obtained or obtainable from the process according to the fifth aspect.

Claims

1-14. (canceled)

15. A zeolitic material of MFI- or MWW-framework type having a framework structure comprising Si, O, and Ti, obtained from a Ti containing compound, wherein the Ti containing compound has an APHA color number of ≤ 300, wherein the Ti containing compound comprises a Ti containing alcoholate selected from the group of Ti(O-alkyl).sub.4, wherein each alkyl group is independently selected from branched or unbranched C1 to C6 alkyl.

16. The zeolitic material of MFI- or MWW-framework type having a framework structure comprising Si, O, and Ti, obtained from a Ti containing compound of claim 15, wherein the Ti containing alcoholate is selected from the group consisting of tetraethyl orthotitanate (Ti(OEt).sub.4), tetraisopropyl orthotitanate (Ti(OPr).sub.4), tetra-n-butyl orthotitanate Ti(OBu).sub.4 and mixtures of two or more of these compounds.

17. The zeolitic material of claim 15, wherein the Ti containing compound comprises at least 90 weight-% of the Ti containing alcoholate based on the overall weight of the Ti containing compound.

18. The zeolitic material of claim 15, wherein the Ti containing compound comprises ≤ 10 weight-% based on the overall weight of the Ti containing compound, of a substance of formula (I) ##STR00006## wherein R, R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen atom and branched or unbranched C1 to C6 alkyl, and R.sup.3 is selected from the group consisting of hydrogen atom, branched or unbranched C1 to C6 alkyl, and branched or unbranched C1 to C6 alkenyl.

19. The zeolitic material of claim 15, wherein the zeolitic material has a titanium dioxide content of ≤ 1.5 weight-% of the titanium dioxide are of anatas form.

20. A Ti containing compound having an APHA color number of ≤ 300 wherein the Ti containing compound comprises a Ti containing alcoholate selected from the group of Ti(O-alkyl).sub.4, wherein each alkyl group is independently selected from branched or unbranched C1 to C6 alkyl.

21. The Ti containing compound having an APHA color number of ≤ 300 of claim 20, wherein the Ti containing compound comprises at least 90 weight-% of the Ti containing alcoholate based on the overall weight of the Ti containing compound.

22. The Ti containing compound having an APHA color number of ≤ 300 of claim 20, wherein the Ti containing compound comprises ≤ 10 weight-% based on the overall weight of the Ti containing compound, of a substance of formula (I), ##STR00007## wherein R, R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen atom and branched or unbranched C1 to C6 alkyl, and R.sup.3 is selected from the group consisting of hydrogen atom, branched or unbranched C1 to C6 alkyl, and branched or unbranched C1 to C6 alkenyl.

23. A method comprising utilizing the Ti containing compound having an APHA color number of ≤ 300 according to claim 20 for the preparation of a zeolitic material having framework structure comprising Si, O, and Ti, wherein the Ti containing compound comprises a Ti containing alcoholate selected from the group of Ti(O-alkyl).sub.4, wherein each alkyl group is independently selected from branched or unbranched C1 to C6 alkyl.

24. A process for preparation of a zeolitic material having a framework structure comprising Si, O, and Ti, wherein the zeolitic material having a framework structure comprising Si, O, and Ti, is prepared from a Ti containing compound having an APHA color number of ≤ 300, wherein said Ti containing compound is as defined in claim 19.

25. A molding comprising a zeolitic material having a framework structure comprising Si, O, and Ti according to claim 15.

26. A method comprising utilizing the molding according to claim 25 as an adsorbent, an absorbent, a catalyst or a catalyst component.

27. A process for oxidizing an organic compound comprising bringing an organic compound in contact with a catalyst comprising the molding according to claim 25.

28. A propylene oxide obtained from the process according to claim 27.

Description

SHORT DESCRIPTION OF THE FIGURES

[0194] FIG. 1 shows the XRD spectra of the solid obtained in Comparative Example 2 with an enlargement of the section where the anatas related peak is present. 98.5 % of the obtained particles were of TS-1 structure with 1.5 % anatas. The impulse is indicated on the y axis. The 2Theta value is indicated on the x axis.

[0195] FIG. 2 shows the Kubelka-Munk-figures, calculated based on % R-spectra, measured with a UV/VIS/NIR spectral photometer Lambda 950 with 150 mm integrating sphere (Ul-brichtkugel) with indication of the lamp switching point, for the titanium silicalite-1 (TS-1) powders of Examples 2-4 and Comparative Examples 1 and 2. The Kubelka-Munk Transformation (KM) is indicated on the y axis versus the wavelength in nanometer on the x axis. The bands above 330 nm (in the range about 330 nm to about 350 nm) indicate the presence of significant amounts of anatas for the samples made from tetraethylorthotitanate with APHA numbers > 300.

[0196] FIG. 3 shows the Kubelka-Munk-figures, calculated based on % R-spectra, measured with a UV/VIS/NIR spectral photometer Lambda 950 with 150 mm integrating sphere (Ul-brichtkugel) with indication of the lamp switching point, for the TiMWW powders of Example 6 and Comparative Example 3. The Kubelka-Munk Transformation (KM) is indicated on the y axis versus the wavelength in nanometer on the x axis. The insert on the right side shows in enlarged modus the image section between 0 and 3 on the y axis. The shoulder above 330 nm (in the range about 330 nm to about 350 nm) for Comparative Example 3 indicates the presence of certain amounts of anatas for the sample made from tetrabutylorthotitanate with APHA number > 300.

[0197] FIG. 4 shows the results of the continuous epoxidation reaction from Example 7.2, wherein the temperature of the cooling medium is indicated on the y axis in °C and the runtime is indicated on the x axis in °C.

[0198] FIG. 5 shows the results of the continuous epoxidation reaction from Example 7.2, wherein the selectivityfor propylene oxide relative to hydrogen peroxide (S(H.sub.2O.sub.2) to PO) was determined according to Reference Example 2 and is indicated on the y axis in %; the runtime is indicated in hours on the x axis.

[0199] FIG. 6 shows a compilation of the results of the continuous epoxidation reaction from Example 7.2, wherein selectivity and temperature are indicated on the y axis in % and in °C respectively and the runtime in hours is indicated on the x axis.

CITED LITERATURE

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