Enichem Anic S.p.a.

Euteco Impianti S.p.a.

Mario D Moretti

Giuseppe Messina

Loreno Lorenzoni

Giovanni Soma

Salvatore R Sanna

Pier Gianni Cabras

Gavino Sanna

A process for the synthesis of vinyl ethers of formula ##STR1## wherein R.sub.1 and R.sub.2, each independently, represent hydrogen or a primary, secondary or tertiary alkyl group,

Process for the preparation of vinyl ethers

A new method of synthesis of a 2,2-dialkoxy-propane e.g. 2,2-dimethoxy-propane, is described through reaction of a cyclic ketal, e.g. 2,2-dimethyl-(1,3)-dioxolane, with a boric acid alkyl ester, e.g. boric acid trimethyl ester, in the presence of an acidic catalyst. The reaction may be carried out either in liquid or in vapor phase. In the latter case, heating of the thus obtained intermediate mixture to the reflux temperature should follow the catalytic step.

Process for the synthesis of 2,2-dialkoxy-propanes

A process for the preparation of dicumyl peroxide by reaction of dimethylbenzyl hydroperoxide (cumene hydroperoxide) with methyl cumyl ether is described. The reaction is carried out in the presence of a catalytic quantity of Lewis or Bronsted acids, the methanol which forms as a by-product being removed as the reaction proceeds. Furthermore, the reaction is carried out in a reaction medium consisting of the methyl cumyl ether itself, which is employed in quantities greater than the stoichiometric quantity required for the reaction with the cumene hydroperoxide.

Process for the preparation of dicumyl peroxide

A process for the preparation of dicumyl peroxide by reaction of dimethylbenzyl hydroperoxide (cumene hydroperoxide) with dimethyl phenyl carbinol in the presence of a catalytic quantity of a phosphorous halide or oxyhalide is described. This catalyst gives good yields of the useful reaction product and a high selectivity.

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Sassari, Italy

Mario D Moretti