The present invention refers to a process for the preparation of unsaturated ketones or aldehydes by pyrolysis of a lactone, in the presence of a reducing agent such as molecular hydrogen or a carboxylic acid, and in the presence of a catalyst, optionally supported, comprising at least one metal selected from the group consisting of Y, Ti, Cd, Mn, Zn, Sc and Zr.


< Highly heat-resistant inorganic fiber-bonded ceramic component and process for the production thereof

< Porous material formation by chemical vapor deposition onto colloidal crystal templates

> Apparatus and method for solution plasma spraying

> Systems for correcting slow roll

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