Patent ID: 7169950
Filing Date: 2007-01-30
Classification: C07B,C07C,C07D,G01D

Abstract:
1. A process for the preparation of monocarbonyl or biscarbonyl or hydroxyl compounds by ozonization of unsaturated organic carbon compounds which have one or more olefinic or aromatic double bonds which can be cleaved by ozone in the molecule, and subsequent work-up of the ozonization products, which comprises reacting unsaturated organic carbon compounds which have one or more olefinic or aromatic double bonds which can be cleaved by ozone in the molecule, a) in an organic solvent or in aqueous solution in 1 to 2 steps continuously in equipment consisting of one to two absorption apparatuses, devices for dissipating heat of the reaction and devices for separating the gas and liquid phase, with countercurrent reactant streams, with ozone in stoichiometric amounts or in excess and b) converting the peroxides which form into the corresponding monocarbonyl or biscarbonyl or hydroxyl compounds either by continuous or discontinuous hydrogenation, oxidation or heating, depending on the reaction parameters from step a), where in step a), the reactant is fed into the first absorption apparatus at a starting concentration which depends on the reactant used and the reaction conditions, whereas the ozone-bearing O then the reaction mixture, following the reaction of the ozone fed into the first absorption apparatus with the correspondingly introduced reactant, emerges from the first absorption apparatus, is separated into a gas phase and a liquid phase, and the liquid phase, which still comprises unreacted reactant, solvent and the corresponding ozonolysis product, is fed into the second absorption apparatus into which the ozone-bearing O and then, when the reaction is complete, the reaction mixture, after emerging from the second absorption column, is again separated into a gas phase and a liquid phase, and then the liquid phase, which now comprises only the corresponding ozonolysis product in the solvent used, is passed to work-up stage b), and the small percentage of ozone present in the gas phase is optionally introduced into the first absorption apparatus for the further reaction of newly introduced reactant.