Montedison S.p.a.

Ausimont

Montepolimeri S.p.a.

Enrico Cavaterra

Guido Petrini

Romano Covini

Luciano Moreschini

Alessandro Bossi

Leonardo Dalloro

Francesco Pignataro

Donato Petrera

Gabriele Colucci

A method for preparing a catalyst for the synthesis of 1,2-dichloroethane by oxychlorination of C.sub.2 H.sub.4 within a fluidized bed, said catalyst containing magnesium, from 1 to 10% by weight of Cu and a carrier consisting of Al.sub.2 O.sub.3, said carrier being impregnated, with an aqueous solution containing both CuCl.sub.2 and MgCl.sub.2, the amount of MgCl.sub.2 being such that the molar ratio: ##EQU1## as defined in the text, is at least 40% higher than the molar ratio: ##EQU2## the ratio W=X:Y being therefore .gtoreq.1.40 and the surface area of the carrier ranging between 80 and 170 sq.m/g.

Method for preparing a catalyst for the synthesis of 1,2-dichloroethane

A supported catalyst for the C.sub.2 H.sub.4 oxychlorination within a fluidized bed comprising a Cu compound in amounts corresponding to a content from 1 to 10% by weight--as Cu metal--on a carrier preferably selected from the group consisting of microspheroidal Al.sub.2 O.sub.3, microspheroidal SiO.sub.2 and microspheroidal silica-alumina, characterized in that the molar ratio (outer Me/outer Cu), as determined by means of XPS analysis, is at least 40% higher than the molar ratio: ##EQU1## wherein Me is e.g., Al, Si or Al +Si. The invention concerns a supported catalyst for the synthesis of 1,2-dichloroethane, hereinafter DCE, achieved by ethylene oxychlorination, said catalyst being used in the form of a fluidized bed.

Supported catalysts for the synthesis of 1,2-dichloroethane by

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 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

Process for preparing alpha, beta unsaturated acids by catalytic

Methacrolein is prepared by the gaseous phase reaction of isobutene and oxygen, in the presence of new solid catalysts consisting of the elements tellurium, cerium, molybdenum, of one or more of the elements lithium, sodium potassium, rubidium, cesium and, in addition, of oxygen.

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Saronno, Italy

Enrico Cavaterra