Abstract: A process for the continuous production of an olefinic oxide such as propylene oxide by direct catalytic oxidation of an olefin with hydrogen peroxide. The process involves successive reaction, distillation, decomposition, phase, separation, condensation and distillation with recycle of various streams to provide improved catalyst life and reaction selectivity.

Abstract: A process for the production of an aromatic amine which comprises the reduction of an aromatic compound containing at least two nitro groups with hydrogen in the presence of a catalyst comprising a metal of Group VIII, wherein the reaction is carried out so as to maintain 30% or less by weight of reaction intermediates and wherein the solution produced is treated to recover the aromatic amine with a purity of over 99% and a mixture comprising aromatic amine and a reaction intermediate which is recycled to the reduction step.

Abstract: The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a).

Abstract: The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and the alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a).

Abstract: A continuous process is described for the preparation of olefin oxides by direct epoxidation of an olefin with hydrogen peroxide, or compounds capable of producing hydrogen peroxide under the reaction conditions, in a solvent medium, in the presence of a catalytic system consisting of a zeolite containing titanium and a buffer system with a pH controlled within the values of 5.5 to 8.0, consisting of a nitrogenated base and a salt thereof with an organic or inorganic acid. The process allows high conversions and selectivities of the olefin into the corresponding oxide with a catalytic activity stable over a period of time.