Catalyst for synthesis of hydrogen peroxide and recovery, and method of preparing same

Patent metadata

Field	Value
Publication number	US-12296326-B2
Application number	US-202017619701-A
Country	US
Kind code	B2
Filing date	Jun 9, 2020
Priority date	Jun 21, 2019
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

Described is a catalyst for preparing hydrogen peroxide by an anthraquinone process and for regenerating a working solution and a method of preparing the catalyst. The catalyst contains palladium, magnesium, and cerium components uniformly distributed in alumina. Alternatively, the catalyst contains a palladium component distributed in a ring shape in an alumina sphere and magnesium and cerium components uniformly distributed in the alumina.

First claim

The invention claimed is:

1. A catalyst applied to a hydrogenation step of producing hydrogen peroxide using an anthraquinone method, wherein the catalyst comprises a palladium component distributed in a ring shape around an alumina sphere and wherein a magnesium component and a cerium component are uniformly distributed in the alumina sphere, and
wherein the ring shape is 5 to 8 μm away from a surface of the alumina sphere and formed to have a thickness of 10 to 20 μm.

2. A method of preparing the catalyst of claim 1 , wherein activated alumina is impregnated with aqueous solutions of magnesium and cerium, calcined, and treated with an aqueous solution of palladium to load a palladium component.

3. The method of claim 2 , wherein the contents of magnesium and cerium impregnated in the activated alumina are 1 to 10 wt % and 0.10 to 0.25 wt %, respectively, with respect to the weight of the magnesium- and cerium-impregnated activated alumina after the calcination.

4. The method of claim 2 , wherein the content of palladium loaded after the calcination is 0.1 to 10 wt % with respect to the weight of the catalyst after the loading.

5. A method of producing hydrogen peroxide comprising the steps of:
a) contacting the catalyst of claim 1 with alkyl anthraquinone in the presence of hydrogen to form alkyl anthrahydroquinone; and
b) oxidizing the alkyl anthrahydroquinone to produce the hydrogen peroxide.

Assignees

• Heesung Catalysts Corp

Inventors

• Kang Dong Kun
• Lee Young Ho
• Yoo Young-San

Classifications

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J35/51

  Spheres · CPC title

• B01J35/399

  homogeneously throughout the support particle · CPC title

• C01B15/023 Primary

  by the alkyl-anthraquinone process · CPC title

• B01J2523/824

  Palladium · CPC title