Direct synthesis of hydrogen peroxide and integration thereof into oxidation processes

US6764671B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Thomas Haas · Munster, DE
• Guido Stochniol · Haltern am See, DE
• Jurgen Rollmann · Pflaumheim, DE

Key dates

• Filing date: Sep 25, 2002
• Grant date: Jul 20, 2004
• Expiry date: Sep 25, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J35/19
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aqueous-organic or organic hydrogen peroxide solutions can be produced by direct synthesis in the presence of a catalyst fixed bed and an organic solvent. According to the invention, a non-explosive gas mixture comprising H2 and O2 is employed and a liquid reaction medium comprising organic solvent and bromide and/or iodide is passed over the fixed bed with a cross-section loading of at least 0.3 m/h. In the case of a trickle bed procedure with a cross-section loading of 0.3 m/h to 2 m/h, 4 to 10 wt. % methanolic H2O2 solutions can be prepared with a high productivity.