New Sol–Gel Technique for the Synthesis of MoxTi Catalysts

  • ChemPubSoc Europe Logo
  • Author: ChemViews
  • Published Date: 10 August 2012
  • Source / Publisher: ChemSusChem/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: New Sol–Gel Technique for the Synthesis of Mo<sub>x</sub>Ti Catalysts

Related Societies

Aromatic carbonates, mainly diphenyl carbonate (DPC), are important materials used for the industrial production of polycarbonates (PCs) by a melt polymerization process. Traditionally, PCs have been produced through the phosgene process, in which interfacial polymerization occurs between bisphenol-A and phosgene. As this process uses large amounts of methylene chloride as the solvent, as well as highly toxic phosgene as a reactant, the substitution of this process with a more environmentally friendly process has driven research.


Shubhangi Umbarkar, National Chemical Laboratory, Pune, India, and, Franck Dumeignil, CNRS Unitè de Catalyse et Chimie du Solide, Villeneuve d’Ascq, France, and colleagues report the use of a new sol–gel technique for the synthesis of MoxTi catalysts; titania loaded with x % MoO3. They used titanium peroxide and molybdenum peroxide as precursors. A series of catalysts with various Mo loadings has been tested for the transesterification of diethyl oxalate (DEO) and phenol to diphenyl oxalate (DPO). Remarkably, 100 % selectivity for DPO was observed, irrespective of the Mo loading, with a maximum conversion of 88 % for 1 wt % MoO3 catalyst.
The stability of the system was exemplified by the recycling and reuse of one formulation three times without a drop in conversion.


Article Views: 2307

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH