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Direct oxidation with oxygen-aldehydes and ketones without by-products

Ref-No: TA-TM948


Abstract

With the new combination catalyst, it is possible for the first time to achieve a very selective and thus by-product-free oxidation of alkanes / cycloalkanes to aldehydes or ketones using molecular oxygen as the oxidizing agent.


Background

The combination catalyst / catalyst system consists of two metal complex compounds which are suitably used simultaneously and thereby catalyze the oxidation of organic substrates with oxygen together. The mechanism in this case, with its multistage nature, has certain similarities to natural oxidation processes, which are also known to be often multistage.

Due to the selectivity of the reaction, only minimal purification is necessary to obtain a product which can be reused or sold. The required reaction conditions are very mild (example: oxidation of cyclohexanone to cyclohexanone-reaction time of 30 minutes at room temperature in MeOH).


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Problem

In many industrial oxidation reactions, in particular the production of aldehydes and ketones by direct oxidation, there is the problem that the known oxidizing agents either have a very non-selective effect or they are very expensive and are therefore unsuitable for large-scale use.


Solution

With the new combination catalyst, it is possible for the first time to achieve a very selective and thus by-product-free oxidation of alkanes / cycloalkanes to aldehydes or ketones using molecular oxygen as the oxidizing agent.
The combination catalyst / catalyst system consists of two metal complex compounds which are suitably used simultaneously and thereby catalyze the oxidation of organic substrates with oxygen together. The mechanism in this case, with its multistage nature, has certain similarities to natural oxidation processes, which are also known to be often multistage.


Advantages

The catalyst system makes it possible to carry out extremely selective oxidations to give aldehydes or ketones with the most inexpensive of all oxidizing agents-air oxygen. This provides an enormous cost reduction potential for the manufacturing chemical industry.


Scope of application

The new inexpensive and effective oxidation process presented  can advantageously be applied in the field of industrial organic synthesis. In addition to the primarily favored application for the preparation of basic chemicals required in large quantities (for example, cyclohexanone for the production of e-caprolactam and ultimately polyamide-6), the process can also be used profitably as an oxidation step in more extensive syntheses sequences. In addition to the large-scale industry, the process is therefore also interesting for producers of special chemicals.


TransMIT Gesellschaft für Technologietransfer mbH

Niklas Günther
+49 (641) 94364-53
niklas.guenther@transmit.de
www.transmit.de 
Address
Kerkrader Str. 3
35394 Gießen



Development status

Feasibility


Patent situation

  • EP pending

Keywords

Oxidation, aldehydes, ketones, cyclohexanone

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