Lonza Inc.

Polynt Gmbh

Gian Luca Castiglioni

Carlo Fumagalli

Roberto Pirola

Carlotta Cortelli

Leonardo Poletti

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).

Process for hydrogenation of esters of aromatic carboxylic acids to yield saturated homologues thereof

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

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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Trescore Balneario, Italy

Gian Luca Castiglioni