Lonza Inc.

Polynt Gmbh

Carlo Fumagalli

Gian Luca Castiglioni

Roberto Pirola

Fabrizio Cavani

Gianluca Mazzoni

Francesco Minisci

Erich Armbruster

Angelo Vaccari

Christian Beisele

Francesca Pierelli

Roberto Leanza

Barbara Panzacchi

Giuseppe Caramaschi

Federico Ghelfi

Rosa Lancia

Trimellitic acid is produced by oxidation of pseudocumene in acetic acid at temperatures between 130 and 240&#xb0; C. in the presence of a catalyst composition containing cobalt, manganese and bromine. The process comprises the stages of: There is no supplementation of catalyst after stage (i).

Process for the production of trimellitic acid

Disclosed is a process for the preparation of a modified vanadium/phosphorus mixed oxide catalyst for the partial oxidation of n-butane to maleic anhydride. The catalyst comprises vanadyl pyrophosphate as main component and niobium as a promoter element in an amount corresponding to an atomic ratio of vanadium to niobiurn in the range of 250:1 to 60:1. The catalyst exhibits improved activity, improved yield of maleic anhydride, and optimal performance from the very beginning of its catalytic lifetime.

Niobium-doped vanadium/phosphorus mixed oxide catalyst

Catalytic compositions of oxides of titanium, vanadium and tin that are suitable for the production of phthalic anhydride by oxidizing o-xylene and/or naphthalene in the gas phase. The catalysts exhibit excellent activity and selectivity. The catalyst contains 2 to 15 percent by weight (calculated as VO) of vanadium, 1 to 15 percent weight (calculated as SnO) of tin and 70 to 97 percent by weight (calculated as TiO) of titanium. In a preferred embodiment the catalyst also contains up to 5 percent by weight (calculated as MO) of at least one alkali metal, preferably lithium, potassium or rubidium, and more preferably cesium. In an even more preferred embodiment, cesium is present in an amount of from 0.01 to 2 percent by weight (calculated as CsO).

Titanium-vanadium-tin comprising catalyst and process for the preparation of phthalic anhydride

Aliphatic carboxylic acids of formulae (Ib) R&#x2014;COOH(Ia) and R&#x2014;COOH wherein Ris tertiary C-alkyl and Rtogether are &#x2014;(CH)&#x2014; with n=3 to 10, are produced by oxidizing an aliphatic or alicyclic ketone of the formula (II):wherein Rand Rare as defined above, with molecular oxygen in the presence of a soluble manganese (II) compound. The process has a high selectivity and is carried out under very mild conditions. It is especially useful for the production of dicarboxylic acids, such as, adipic acid, from cyclic ketones.

Process for the production of carboxylic acids

A process for the production of gamma-butyrolactone. Starting from maleic and/or succinic anhydride the conversion takes place in the vapor phase of a Cu/Cr catalyst.

Process for the production of gamma-butyrolactone

A process for the production of gamma-butyrolactone. Starting from maleic and/or succinic anhydride the conversion takes place in the presence of a catalyst composed of copper oxide and zinc oxide.

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Albano Sant' Alessandro, Italy

Carlo Fumagalli