Catalyst system for preparing propylene oxide

Patent metadata

Field	Value
Publication number	US-10053439-B2
Application number	US-201715636787-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jul 24, 2013
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A catalytic system containing a titanium zeolite of structure type MWW optionally containing zinc and containing at least one of an inorganic potassium salt and an organic potassium salt is provided. The catalyst system is useful in the preparation of propylene oxide.

First claim

The invention claimed is:

1. A catalytic system of a continuous process for the preparation of propylene oxide, comprising:
a titanium zeolite of structure type MWW optionally comprising zinc; and
a potassium salt dissolved in an aqueous acetonitrile mixture:
wherein the potassium salt comprises at least one selected from the group consisting of an inorganic potassium salt, and an organic potassium salt.

2. The catalytic system according to claim 1 , wherein the potassium salt comprises an inorganic potassium salt which is selected from the group consisting of potassium hydroxide, potassium chloride and potassium nitrate.

3. The catalytic system of claim 1 , wherein a content of titanium, calculated as elemental titanium, is from 0.1 to 5 weight-%, based on the total weight of the titanium zeolite of framework structure type MWW.

4. A continuous process for the preparation of propylene oxide, comprising:
acetonitrile as solvent;
hydrogen peroxide as epoxidation agent; and
the catalytic system of claim 1 .

5. The catalytic system according to claim 1 , wherein the potassium salt comprises an organic potassium salt which is selected from the group consisting of potassium formate, potassium acetate, potassium carbonate, and potassium hydrogen carbonate.

6. The catalytic system of claim 1 , wherein the titanium zeolite of structure type MWW comprises zinc and a content of the zinc, calculated as elemental zinc, is from 0.1 to 5 weight-%, based on the total weight of the titanium zeolite of framework structure type MWW.

Assignees

• Basf Se
• Dow Global Technologies Llc

Inventors

• Riedel Dominic
• Teles Joaquim Henrique
• Wegerle Ulrike
• Parvulescu Andrei-Nicolae
• Schroeder Alexander
• Spiske Luise
• Urbanczyk Daniel
• Mueller Ulrich
• Witzl Werner
• Weidenbach Meinolf

Classifications

• B01J2229/183

  in framework positions · CPC title

• C01B39/12

  the replacing atoms being {at least} boron atoms · CPC title

• C07D303/04

  containing only hydrogen and carbon atoms in addition to the ring oxygen atoms · CPC title

• C01B39/026

  After-treatment · CPC title

• C01B39/48

  using at least one organic template directing agent · CPC title