Abstract: A catalytic bed for the partial oxidation of n-butane to maleic anhydride which comprises at least one first catalytic layer and at least one second catalytic layer, wherein each catalytic layer consists of a vanadium and phosphorus mixed oxide (VPO) catalyst and only the catalyst of the second catalytic layer further comprises tungsten, and wherein the second catalytic layer constitutes 25% to 45% of the total length of the catalytic bed and is arranged consecutively after the first catalytic layer along the direction in which the mixture of gases comprising the oxidation reagents flows. The present invention also relates to a process for producing maleic anhydride by partial oxidation of n-butane which uses the catalytic bed.

Abstract: A catalytic bed for the partial oxidation of n-butane to maleic anhydride which comprises at least one first catalytic layer and at least one second catalytic layer, wherein each catalytic layer consists of a vanadium and phosphorus mixed oxide (VPO) catalyst and only the catalyst of the second catalytic layer further comprises tungsten, and wherein the second catalytic layer constitutes 25% to 45% of the total length of the catalytic bed and is arranged consecutively after the first catalytic layer along the direction in which the mixture of gases comprising the oxidation reagents flows. The present invention also relates to a process for producing maleic anhydride by partial oxidation of n-butane which uses the catalytic bed.

Abstract: A process for the hydrogenation of substituted aromatic compounds, with particular reference to esters of aromatic carboxylic acids, for example of aromatic esters used commonly as plasticizers in polymers having wide commercial application (see, in particular, esters of phthalic acid and trimellitic acid).

Abstract: A process for the hydrogenation of substituted aromatic compounds, with particular reference to esters of aromatic carboxylic acids, for example of aromatic esters used commonly as plasticizers in polymers having wide commercial application (see, in particular, esters of phthalic acid and trimellitic acid).

Abstract: The object of the invention is a new Sheet Molding Compound (SMC), Thick Molding Compound (TMC), or Bulk Molding Compound (BMC) comprising at thermosetting resin on the basis of renewable resources with which molded parts can be produced in a molding process at elevated temperature and pressure said process being suitable to produce molded parts in an industrial process.

Abstract: Trimellitic acid is produced by oxidation of pseudocumene in acetic acid at temperatures between 130 and 240° C. in the presence of a catalyst composition containing cobalt, manganese and bromine. The process comprises the stages of: (i) simultaneously feeding pseudocumene and air or an oxygen-containing gas into a solution containing acetic acid and the catalyst composition, at an addition rate resulting in an oxygen concentration in the off-gas of less than 8 vol %, and at a temperature and a pressure sufficient to result in 5 to 25 mol % of the total amount of oxygen required to oxidize the pseudocumene to trimellitic acid being consumed, and (ii) feeding air or an oxygen-containing gas into the reaction mixture obtained in stage (i) until essentially all of the pseudocumene has been consumed and a molar yield of trimellitic acid of at least 90% has been obtained. There is no supplementation of catalyst after stage (i).

Abstract: The object of the invention is a new Sheet Molding Compound (SMC), Thick Molding Compound (TMC), or Bulk Molding Compound (BMC) comprising at thermosetting resin on the basis of renewable resources with which molded parts can be produced in a molding process at elevated temperature and pressure said process being suitable to produce molded parts in an industrial process