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Italcementi S.p.a.

Societa Italiana Serie Acetica Sintetica S.p.a.

Paolo Gronchi

Franco Codignola

Paolo Centola

Luigi Cassar

Tiziana De Marco

Giorgio Vergini

Renato Del Rosso

This invention concerns a procedure for preparing amorphous silica from calcium silicate and CO , with formation and separation of precipitate CaCO .

Procedure for preparing silica from calcium silicate

The invention relates to a process for the oxidation of unsaturated hydrocarbons, particularly butenes and isobutylene, for the production of acetic acid, propionic acid and acetone. Specifically the invention comprises the highly selective oxidation of an unsaturated hydrocarbon or of a mixture of unsaturated hydrocarbons in the presence of a catalyst consisting of a complex of trivalent cobalt and of a carbonyl compound, of the aldehydic or ketonic type.

Process for the oxidation of unsaturated aliphatic hydrocarbons

The process for the preparation of 1,4-butynediol through the reaction of acetylene with formaldehyde in the presence of a catalytic metal, preferably copper, is improved by using, as the support of the catalytic metal, a molecular sieve or synthetic zeolite to which the catalytic metal is chemically bonded through an ion exchange reaction. There are obtained increased production rates and selectivity and the polymer of acetylene, namely cuprene, is essentially prevented from being formed.

Process for the preparation of 1,4-butynediol and related catalyst

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Milan, Italy

Paolo Gronchi