Patent ID: 7838705
Filing Date: 2010-11-23
Classification: C07C

Abstract:
1. A process for preparing cyclododecanone, which comprises steps (I) and (II): (I) preparing cyclododecene by partially hydrogenating cyclododecatriene in the presence of at least one homogeneous hydrogenation catalyst; (II) reacting cyclododecene obtained in (I) with dinitrogen monoxide using a suitable catalyst to obtain cyclododecanone, wherein the source used for the dinitrogen monoxide used in (II) is at least one offgas comprising dinitrogen monoxide from at least one industrial process, wherein cyclododecatriene is partially hydrogenated to cyclododecene in (I) and cyclododecene is converted to cyclododecanone using dinitrogen monoxide in (II) in the presence of the same catalyst, and wherein the reactant used for the reaction with dinitrogen monoxide in (II) is a mixture which results from the partial hydrogenation of cyclododecatriene to cyclododecene in the presence of a homogeneous catalyst in (I) and comprises cyclododecene and homogeneous catalyst.