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Novel Pd/Au bio-catalysts

Technology Benefits

Better selectivity than Pd/Au catalyst produced on metallic supports No toluene by products in alcohol to aldehyde oxidation reactions

Detailed Technology Description

Bimetallic nanoparticles have been produced using E. coli cells grown in anaerobic respiratory mode which promotes hydrogenase expression. Palladium is added to the cell surface by the reduction of the palladium by the hydrogenase enzyme on the cell membrane. Gold is added as Au(III) anaerobically to the bio-Pd suspension. The catalyst is harvested by centrifugation. This catalyst has been used in the oxidation of benzyl alcohol to benzaldehyde under experimental conditions without additional solvent. The reaction has been demonstrated to take place without undesirable side products of toluene and benzoic acid. The inventors have shown in further work that biological palladium catalysts can increase the ratio of the cis to trans forms which may be of particular interest in the fragrance and flavours markets. Initial trials have also been carried out on catalysis of hydrogen peroxide production

Supplementary Information

Patent Number: WO2011086343A3
Application Number: WO2011GB18A
Inventor: MACASKIE, Lynne | DEPLANCHE, Kevin
Priority Date: 15 Jan 2010
Priority Number: WO2011086343A3
Application Date: 10 Jan 2011
Publication Date: 3 May 2012
IPC Current: B01J002344 | B01J002338 | B01J002352 | C12R000101 | C12R000119
Assignee Applicant: The University of Birmingham
Title: CATALYST COMPRISING PALLADIUM AND GOLD ADSORBED ONTO A BIOLOGICAL SUPPORT | CATALYSEUR AMÉLIORÉ
Usefulness: CATALYST COMPRISING PALLADIUM AND GOLD ADSORBED ONTO A BIOLOGICAL SUPPORT | CATALYSEUR AMÉLIORÉ
Summary: For chemical reactions, where the chemical reactions are reduction/oxidation (REDOX) reactions (preferably oxidation reaction) (claimed).
Novelty: New bio-catalyst useful chemical reaction such as reduction/oxidation reactions comprises palladium and gold adsorbed onto a biological support

Industry

Environmental/Green Technology

Sub Category

Solar Cell

*Abstract

The oxidation of alcohols to aldehydes is an important commercial process . The reaction can be carried out without catalysts however there is substantial interest in the development of heterogeneous catalysts that use either O2 or H2O2 as the oxidant . Gold nanocrystals have been shown to be effective for gaseous phase reactions but are ineffective for aqueous phase oxidation. There is a need for an aqueous phase catalyst.

*Principal Investigator

Name: Prof. Lynne Macaskie

Department:

Country/Region

USA