Abstract: Process for the removal of sodium from sodium-containing heavy fractions from a process for the combined production of styrene and propylene oxide comprising admixing an aqueous solution of an organic carboxylic acid to the heavy fraction at a temperature comprised between 20° C. and 100° C., and separation of the organic phase from the aqueous phase, wherein the organic phase contains less than 0.5% by weight of polymeric solids. The obtained organic phase has low viscosity and ash content and can be used directly as a fuel.

Abstract: The present disclosure describes a method for the revaluation of aqueous waste streams generated in the propylene oxide and styrene co-production processes. In particular, it discloses a method of reducing the organic contaminant load from a highly contaminated aqueous stream and recovery from said stream of organic compounds that may be recirculated or used as fuel in the co-generation of energy, and which comprises: acidification of said aqueous stream with inorganic acid at a pH less than 4.5; separation of the two resulting phases at a temperature greater than 40° C.; washing of the organic phase produced in the previous step with an aqueous solution of excess acid and separation of the two resulting phases.

Abstract: The present disclosure describes a method for the revaluation of aqueous waste streams generated in the propylene oxide and styrene co-production processes. In particular, it discloses a method of reducing the organic contaminant load from a highly contaminated aqueous stream and recovery from said stream of organic compounds that may be recirculated or used as fuel in the co-generation of energy, and which comprises: acidification of said aqueous stream with inorganic acid at a pH less than 4.5; separation of the two resulting phases at a temperature greater than 40° C.; washing of the organic phase produced in the previous step with an aqueous solution of excess acid and separation of the two resulting phases.

Abstract: The present invention relates to a process for preparing hydrogen peroxide by reacting hydrogen and oxygen in the presence of a solvent and of a catalyst, wherein the catalyst comprises at least one noble or semi-noble metal supported on an inorganic material functionalized with acid groups. The invention also refers to the catalyst used in this process.

Abstract: In this invention, a process to obtain hydrogen peroxide solutions by means of the direct reaction of hydrogen and oxygen in the presence of a solvent and of catalysts constituted from noble or semi-noble metals, or combinations of several of these metals, supported on a halogen-free acid resin, is described.

Abstract: The invention relates to a process for preparing hydroperoxides from their corresponding hydrocarbons which comprises oxidizing said hydrocarbons, particularly ethylbenzene, with an oxygen containing gas in the presence of a catalyst comprising a cyclic imide compound and a compound selected from the group consisting of an alkali metal compound or mixture thereof.

Abstract: Process for the removal of sodium from sodium-containing heavy fractions from a process for the combined production of styrene and propylene oxide comprising admixing an aqueous solution of an organic carboxylic acid to the heavy fraction at a temperature comprised between 20° C. and 100° C., and separation of the organic phase from the aqueous phase, wherein the organic phase contains less than 0.5% by weight of polymeric solids. The obtained organic phase has low viscosity and ash content and can be used directly as a fuel.

Abstract: The invention relates to a process for preparing hydroperoxides from their corresponding hydrocarbons which comprises oxidizing said hydrocarbons, particularly ethylbenzene, with an oxygen containing gas in the presence of a catalyst comprising a cyclic imide compound and a compound selected from the group consisting of an alkaline metal compound or mixture thereof.

Abstract: Oxidized compounds are produced in a continuous integrated process in liquid phase, which comprises: Step I, synthesis of non acidic hydrogen peroxide solutions by direct reaction between hydrogen and oxygen by catalytic reaction utilizing a noble metal catalyst. Step II, this hydrogen peroxide solution is directly mixed with an organic substrate, a suitable catalyst and optionally a solvent. The integrated process requires no treatment step and is particularly well adapted to the production of propylene oxide.

Abstract: Oxidized compounds are produced in a continuous integrated process in liquid phase, which comprises: Step I, synthesis of non acidic hydrogen peroxide solutions by direct reaction between hydrogen and oxygen by catalytic reaction utilizing a noble metal catalyst. Step II, this hydrogen peroxide solution is directly mixed with an organic substrate, a suitable catalyst and optionally a solvent. The integrated process requires no treatment step and is particularly well adapted to the production of propylene oxide.

Abstract: In this invention, a process to obtain hydrogen peroxide solutions by means of the direct reaction of hydrogen and oxygen in the presence of a solvent and of catalysts constituted from noble or semi-noble metals, or combinations of several of these metals, supported on a halogen-free acid resin, is described.

Abstract: Alkene oxides are produced in a continuous integrated two-,step process performed in liquid phase. Step I comprises the oxidation of a secondary alcohol with molecular oxygen to generate hydrogen peroxide at moderate temperature and pressure. This reaction mixture is introduced directly to an olefinic substrate maintained in organic solvent at elevated pressure. During step II of the procedure the olefins undergo epoxidation by the hydrogen peroxide in the presence of a catalyst of titanium-impregnated, amorphous silica. The integrated process requires no intermediate purification or enrichment step and it is particularly well adapted to the production of propylene oxide.

Abstract: Epoxidation procedure for olefinic compounds with hydrogen peroxide in the presence of solvents, preferably C.sub.1 -C.sub.8 alcohols, using silica supported titanium catalysts, prepared by the impregnation of the silica with solutions of titanium alkoxydes and/or titanocenes in oxygenated organic solvents.

Abstract: The propylene oxide and styrene co-production process generates a heavy residue byproduct containing metals, mainly sodium, which previously was adequate for use only as low quality fuel. According to the invention, the heavy residue is dehydrated in the presence of a strong inorganic acid at temperatures of 150-250.degree. C. and pressures below the atmospheric pressure to yield styrene and recover 2-phenylethanol, a compound used in the perfume industry, and a heavy residue substantially free of metals that may be used as fuel.

Abstract: Improved procedure for the production of hydrogen peroxide by oxidation with molecular oxygen of secondary alcohols admixed with primary alcohols and/or ethers.