Montedison S.p.a.

Luciano Moreschini

Guido Petrini

Leonardo Dalloro

Romano Covini

Enrico Cavaterra

Preparation of aliphatic alpha, beta-unsaturated carboxylic acids from the corresponding saturated acids by oxidative dehydrogenation, at a temperature between 250.degree. and 500.degree. C., in the presence of a catalyst of empirical formula: FeP.sub.x Me.sub.y Me'.sub.t O.sub.z wherein Me is at least one alkali or alkaline earth element, Me' is at least one element selected from the group consisting of Ni, Cu, Ce, Al, Zr, Hf and Pr, x is between 0.2 and 15, y is between 0.01 and 2, t is between 0.01 and 5 and z is such as to satisfy the valencies of the other elements.

Process for the production of methacrylic acid

Alpha, beta-unsaturated monocarboxylic acids, in particular methacrylic acid, are esterified in the vapor phase in contact with a catalyst containing, in combination with oxygen, tungsten alone or in admixture with one or more of the elements lithium, sodium, potassium, rubidium and cesium.

Process for the esterification in vapor phase of alpha, beta-unsaturated

Alpha, beta-unsaturated acids are obtained by gas-phase catalytic oxidation of saturated acids containing from 3 to 8 carbon atoms. The catalyst used has the empirical composition

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Milan, Italy

Luciano Moreschini