Process for preparing a molding comprising zinc and a titanium-containing zeolite

Patent metadata

Field	Value
Publication number	US-11110442-B2
Application number	US-202016997038-A
Country	US
Kind code	B2
Filing date	Aug 19, 2020
Priority date	Jan 18, 2017
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A process for preparing a molding comprising zinc and a titanium-containing zeolitic material having framework type MWW, comprising (i) providing a molding comprising a titanium-containing zeolitic material having framework type MWW; (ii) preparing an aqueous suspension comprising a zinc source and the molding comprising a titanium-containing zeolitic material having framework type MWW prepared in (i); (iii) heating the aqueous suspension prepared in (ii) under autogenous pressure to a temperature of the liquid phase of the aqueous suspension in the range of from 100 to 200° C., obtaining an aqueous suspension comprising a molding comprising zinc and a titanium-containing zeolitic material having framework type MWW; (iv) separating the molding comprising zinc and a titanium-containing zeolitic material having framework type MWW from the liquid phase of the suspension obtained in (iii).

First claim

The invention claimed is:

1. A molding comprising zinc and a titanium-containing zeolitic material having framework type MWW, obtained by a process comprising:
(i) providing a molding comprising a titanium-containing zeolitic material having framework type MWW;
(ii) preparing an aqueous suspension comprising a zinc source and the molding comprising a titanium-containing zeolitic material having framework type MWW prepared in (i);
(iii) heating the aqueous suspension prepared in (ii) under autogenous pressure to a temperature of the liquid phase of the aqueous suspension of from 100 to 200° C., thereby obtaining an aqueous suspension comprising a molding comprising zinc and a titanium-containing zeolitic material having framework type MWW; and
(iv) separating the molding comprising zinc and a titanium-containing zeolitic material having framework type MWW from the liquid phase of the suspension obtained in (iii);
wherein in (ii), the zinc source comprises a zinc compound which is soluble in water at a temperature and pressure of the liquid aqueous phase according to (iii).

2. The molding of claim 1 , wherein the molding provided in (i) comprises the titanium-containing zeolitic material having framework type MWW and a binder, wherein in the molding provided in (i), a weight ratio of the titanium-containing zeolitic material having framework type MWW relative to the binder is from 1:1 to 9:1.

3. The molding of claim 2 , wherein at least 99 wt. % of the molding provided in (i) consist of the titanium-containing zeolitic material having framework type MWW and the binder.

4. The molding of claim 1 , wherein the molding provided in (i) has at least one of the following characteristics (1) to (3):
(1) a BET specific surface area of at least 300 m 2 /g;
(2) a pore volume of at least 0.9 mL/g;
(3) a mechanical strength of from 5 to 10 N.

5. The molding of claim 1 , wherein at least 99 wt. % of the titanium-containing zeolitic material having framework type MWW comprised in the molding provided in (i) consists of Ti, Si, O, and H, wherein the titanium-containing zeolitic material having framework type MWW comprised in the molding provided in (i) has a titanium content, calculated as elemental titanium, of from 0.1 to 5 wt. %, based on a total weight of the titanium-containing zeolitic material having framework type MWW.

6. The molding of claim 1 , wherein the titanium-containing zeolitic material having framework type MWW comprised in the molding provided in (i) is in the form of a powder having a particle size distribution having a Dv10 value of from 1 to 10 micrometer, and a Dv90 value of from 12 to 200 micrometer.

7. The molding of claim 1 , wherein the zinc source comprises at least one zinc salt soluble in water.

8. The molding of claim 1 , wherein in the aqueous suspension prepared in (ii), a weight ratio of zinc comprised in the zinc source relative to the titanium-containing zeolitic material having framework type MWW comprised in the molding is from 0.005:1 to 0.1:1.

9. The molding of claim 1 , wherein in the aqueous suspension prepared in (ii), a weight ratio of the titanium-containing zeolitic material having framework type MWW comprised in the molding relative to water is from 0.01:1 to 0.1:1.

10. The molding of claim 1 , wherein in (iii), the suspension prepared in (ii) is heated to and kept at a temperature of the liquid phase of the aqueous suspension of from 110 to 175° C.

11. The molding of claim 1 , wherein the process further comprises:
(v) drying the separated molding comprising zinc and a titanium-containing zeolitic material having framework type MWW obtained from (iv); and
(vi) calcining the dried molding comprising zinc and a titanium-containing zeolitic material having framework type MWW obtained from (v).

12. A molding comprising zinc and a titanium-containing zeolitic material having framework type MWW, wherein in the molding, a weight ratio of zinc relative to the titanium-containing zeolitic material having framework type MWW is from 0.005:1 to 0.1:1,
wherein the molding has a water absorption capacity of from 8 to 12 weight %.

13. The molding of claim 12 , having at least one of the following characteristics:
a BET specific surface are of at least 200 to m 2 /g;
a crystallinity of at least 50%;
a porosity of at least 0.9 mL/g;
a mechanical strength of from 9 to 23 N;
a PO test parameter of at least 8%.

14. A process for converting a hydrocarbon, comprising contacting the hydrocarbon with a catalyst comprising the molding of claim 1 .

15. A process for converting a hydrocarbon, comprising contacting the hydrocarbon with a catalyst comprising the molding of claim 12 .

16. The process of claim 15 , wherein the hydrocarbon comprises an alkene, and the alkene is epoxidized in the presence of a solvent.

Assignees

• Basf Se

Inventors

• Parvulescu Andrei-Nicolae
• Mueller Ulrich
• Luetzel Hans-Juergen
• Teles Joaquim Henrique
• Riedel Dominic
• Urbanczyk Daniel
• Wegerle Ulrike
• Weber Markus
• Woerz Nicolai Tonio
• Mueller Christian

Classifications

• B01J35/30

  characterised by their physical properties · CPC title

• B01J2235/15

  X-ray diffraction · CPC title

• B01J35/77

  Compounds characterised by their crystallite size · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J35/36

  Mechanical strength · CPC title