Abstract: A process for preparing quaternary ammonium hydroxides by electrolysis in an electrolytic cell comprising two compartments, namely an anode and a cathode compartment, separated by an anion exchange permselective membrane, starting from quaternary ammonium halides.

Abstract: A process for isomerizing styrene or homologues to .beta.-phenylaldehydes, consisting of conducting the isomerization reaction in the presence of a catalyst constituted by synthetic zeolites containing titanium, of formulaxTiO.sub.2.(1-x)SiO.sub.2where x lies between 0.0001 and 0.04, and optionally in the presence of one or more solvents, operating at a temperature of between 30.degree. and 100.degree. C.

Abstract: A process for oxidizing primary and/or secondary alcohols to the corresponding aldehyde and/or ketone derivatives, consisting of reacting said alcohols with an aqueous solution of hydrogen peroxide in the presence of synthetic zeolites containing titanium atoms, of general formula:xTiO.sub.2.(1-x)SiO.sub.2,where x lies between 0.0001 and 0.04, and possibly in the presence of one or more solvents, operating at a temperature of between 20.degree. and 100.degree. C.

Abstract: A process for the synthesis of glycol monomethylethers consisting of reacting an olefin compound, methanol and hydrogen peroxide in aqueous solution in the presence of synthetic zeolites containing titanium atoms, of general formula:xTiO.sub.2.(1-x)SiO.sub.2,where x lies between 0.0001 and 0.04.

Abstract: The mechanical and thermal properties of aluminum oxide, such as .gamma. alumina, adapted for use as a catalyst or catalyst carrier are improved through a treatment thereof with a silicon compound containing hydrolyzable radicals, such as methyl orthosilicate, in which the aluminum compound is impregnated with the silicon compound or a solution thereof in a compatible organic solvent whose boiling point is lower than the boiling point of the silicon compound. The impregnated aluminum oxide is slowly brought to the boiling temperature of the silicon compound in an inert atmosphere so as to cause silicon compound to react with the aluminum oxide and to distill off reaction products and excess silicon compound. The hydrolyzable groups bound to the silicon compound on the aluminum oxide are then reacted with water and distilled off.

Abstract: The mechanical and thermal properties of aluminum oxide, such as .gamma. alumina, adapted for use as a catalyst or catalyst carrier are improved through a treatment thereof with a silicon compound such as an alkyl orthosilicate in which the aluminum oxide is impregnated with the silicon compound or a solution thereof in a compatible organic solvent whose boiling point is lower than the boiling point of the silicon compound. The impregnated aluminum oxide is dried at a temperature in the range from above the boiling point of the silicon compound to 500.degree. C and is then subjected to controlled oxidation.

Abstract: A method is disclosed for preparing tertiary olefins starting from the corresponding tertiary ethers, the improvement consisting in contacting the ether with a catalyst composed by active alumina modified by reaction with a silicon compound selected among those corresponding to the general formula: ##STR1## wherein X,Y,Z and W can be --R, --OR, --Cl, --Br, --SiH.sub.3 , --COOR, --Sih.sub.n O.sub.m, R being hydrogen, an alkyl, cycloalkyl, aryl, aralkyl or alkyl-cycloalkyl radical of from 1 to 30 carbon atoms, n and m being integers comprised between 1 and 3. The advantages afforded by the invention are mainly the nearly quantitative yields and the high purity of the end products.

Abstract: The mechanical and thermal properties of aluminum oxide, such as .gamma. alumina, adapted for use as a catalyst or catalyst carrier are improved through a treatment thereof with a silicon compound such as an alkyl orthosilicate in which the aluminum oxide is impregnated with the silicon compound or a solution thereof in a compatible organic solvent whose boiling point is lower than the boiling point of the silicon compound. The impregnated aluminum oxide is dried at a temperature in the range from above the boiling point of the silicon compound to 500.degree. C. and is then subjected to controlled oxidation.