Abstract: A catalytically active gel is described consisting of a silica matrix with uniform porosity, monomodal pore distribution and high surface area, within which one or metal oxides possessing catalytic activity are dispersed. A process for preparing this catalytic gel is also described.

Abstract: A process for the alkylation of aliphatic hydrocarbons with olefins catalyzed by a silica-based material, characterised in that the surface Si--OH groups of said silica are esterified with a fluoroalkylsulphonic acid of formula CF.sub.3 (CF.sub.2).sub.n SO.sub.3 H, where n is a whole number between 0 and 11, said material having a Hammett acidity Ho.ltoreq.-11.4.

Abstract: Zeolites having a pore diameter comprised within the range of from 5 to 12 .ANG. are bonded with amorphous oligomeric silica, by dispersing them in an aqueous solution of silica and alkylammonium hydroxide, and submitting the obtained suspension to a quick drying.

Abstract: A catalytically active gel product is described consisting of a silica matrix which is amorphous to x-rays with uniform porosity, monomodal pore distribution and high surface area, within which one or more metal oxides possessing catalytic activity are dispersed. A process for preparing this catalytic gel is also described.

Abstract: Process for oxidating paraffinic compounds into their corresponding alcoholic and/or ketonic derivatives, which process consists in causing said paraffins to react, at a temperature comprised within the range of from 0.degree. C. to 100.degree. C., preferably in an acidic medium, with a mixture of oxygen and hydrogen, in the presence of a catalyst on the basis of titanium-silicalite and of a noble metal and/or a derivative of such a metal.

Abstract: A crystalline, porous, synthetic material is disclosed, together with its related preparation process.Such a material of zeolitic character, containing silicon, titanium and iron oxides, corresponds, in its calcined and anhydrous state, to the following empi rical formulapHFeO.sub.2.qTiO.sub.2.SiO.sub.2wherein p has a value greater than zero and lower than or equal to 0.050, q has a value greater than zero and lower than or equal to 0.025, and the H.sup.+ of HFeO.sub.2 can be at least partly replaceable or replaced by cations.

Abstract: Process for oxidizing organic compounds with hydrogen peroxide in the presence of titanium-silicalite and of a water-alcohol solvent which, after the preliminary separation of the oxidation product and of the water formed during the reaction, is used again in order to extract hydrogen peroxide produced in a redox process with alkyl-anthraquinone and is fed again to the oxidation reaction.

Abstract: Process for the preparation of 4,4'-diaminodiphenylmethane and its derivatives.4,4'-diaminodiphenylmethane and its derivatives are prepared by the condensation of aniline, or its derivative, and aldehyde, or its precursor and/or isomerization of appropriate intermediate products. The reaction proceeds with zeolites acting as catalysts; these catalysts, which are selected in accordance with the reaction to be effected, are preferably zeolites based on Si, Al and B; Si, Al and Ti; Ti and Fe; ZSM-5; or Y zeolites.

Abstract: Process for oxidating paraffinic compounds into their corresponding alcoholic and/or ketonic derivatives, which process consists in causing said paraffins to react, at a temperature comprised within the range of from 0.degree. C. to 100.degree. C., preferably in an acidic medium, with a mixture of oxygen and hydrogen, in the presence of a catalyst on the basis of titanium-silicalite and of a noble metal and/or a derivative of such a metal.

Abstract: Process for oxidating paraffinic compounds in order to yield the corresponding alcoholic and/or ketonic compounds, which process consists of reacting said paraffins with an aqueous solution of hydrogen peroxide, possibly dissolved in a solvent, by operating at a temperature comprised within the range of from 0.degree. C. to 100.degree. C., in the presence of a titanium-silicalite of formulapHMO.sub.2.qTiO.sub.2.SiO.sub.2whereinM is a metal selected from among aluminum, gallium and iron,p is comprised within the range of from 0 to 0.05 andq is comprised within the range of from 0.0001 to 0.04, and the H.sup.+ of HMO.sub.2 can be least partially replaceable or replaced by cations.

Abstract: A silica and alumina gel is disclosed, which is amorphous at X-rays, has a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 comprised within the range of from 30/1 to 500/1, a surface area comprised within the range of from 500 to 1000 m.sup.2 /g, a total volume of pores comprised within the range of from 0.3 to 0.6 ml/g, an average diameter of the pores of the order of magnitude of 10 .ANG. or less and which is free, or substantially free, from pores having a diameter larger than 30 .ANG..Such a silica and alumina gel is catalytically active in reactions of conversion of the hydrocarbons, such as: oligomerization, alkylation, isomerization and dewaxing.Also a process for preparing such a silica and alumina gel is disclosed.

Abstract: Disclosed is a solid catalyst functionalized with sulfonic groups, containing from 20 to 99% by weight of silica, with the residual percentage being definable by means of the formula:(ZrP.sub.2 O.sub.7).sub.1-x {(Zr(HPO.sub.4).sub.2-y.[O.sub.3 P-R(SO.sub.3 H).sub.n ].sub.y }.sub.xwherein:R is an either linear or branched linear hydrocarbon radical containing from 1 to 10 carbon atoms, or an aryl radical;x is a numeral higher than 0 and of up to 1;y is a numeral higher than 0 and of up to 2;n is either 1 or 2;with said catalyst furthermore showing silicon-oxygen-phosphorus bonds on N.M.R. examination and being amorphous or substantially amorphous when examined under X rays.The catalyst is useful in the acidic catalysis, for example in reactions of hydrocarbon conversion, such as alkylation, isomerization and oligomerization. The product according to the present invention is furthermore useful as an ion exchange agent.

Abstract: A process for the epoxidation of olefinic compounds comprising reacting said compounds with hydrogen peroxide introduced as such or produced by substances under the reaction conditions, in the presence of synthetic zeolites containing titanium atoms corresponding to the general formula:x TiO.sub.2.(1-x)SiO.sub.2wherein x is in the range of from about 0.0001 to about 0.04, and optionally, in presence of one or more solvents, at a temperature in the range of from about 0.degree. to about 150.degree. C. and at a pressure of from about 1 to about 100 atm. The synthetic zeolites are treated with alkaline substances before and/or during their use in the reaction, or alternatively the synthetic zeolites are acid neutralized with a compound such as X-Si-(R).sub.3 where X is selected from Cl, Br, I, ##STR1## and an imidazolyl group wherein R is selected from an alkyl, aryl or alkylaryl group.

Abstract: Olefins with between 4 and 24 and preferably between 10 and 20 carbon atoms are selectively dimerized by using zeolite catalysts in acid form which are partially exchanged with salts of metals having a valency of two or more.

Abstract: The mutual condensation of aromatic and carbonylic compounds is carried out with zeolitic materials derived from silicalite by replacing a portion of silicon with B and Al, Al and Ti, Ti and Fe, and with ZSM-5, to yield diaryl-alkanes.

Abstract: The present invention relates to a catalyst for the selective decomposition of cumene hydroperoxide, composed of zeolite crystals wherein a portion of the silicon atoms in the crystal lattice of silica is replaced by Al and B. The zeolite crystals are bonded to each other by a siliceous bonding agent which allows the catalyst to assume the shape of mechanically stable microspheres.The invention relates also to a process in which the catalyst is used, and to the related operating conditions.

Abstract: A process for the epoxidation of olefinic compounds comprising reacting said compounds with hydrogen peroxide introduced as such or produced by substances under the reaction conditions, in the presence of synthetic zeolites containing titanium atoms corresponding to the general formula:x TiO.sub.2 (1-x) SiO.sub.2wherein x is in the range of from about 0.0001 to about 0.04, and optionally, in presence of one or more solvents, at a temperature in the range of from about 0.degree. to about 150.degree. C. and at a pressure of from about 1 to about 100 atm. The synthetic zeolites are treated with alkaline substances before and/or during their use in the reaction, or alternatively the synthetic zeolites are acid neutralized with a compound such as X-Si-(R).sub.3 where X is selected from Cl, Br, I, ##STR1## and an imidazolyl group wherein R is selected from an alkyl, aryl or alkylaryl group.

Abstract: The present invention relates to a catalyst for the selective decomposition of cumene hydroperoxide, composed of zeolite crystals wherein a portion of the silicon atoms in the crystal lattice of silica is replaced by Al and B. The zeolite crystals are bonded to each other by a siliceous bonding agent which allows the catalyst to assume the shape of mechanically stable microspheres.The invention relates also to a process in which the catalyst is used, and to the related operating conditions.

Abstract: A process for the alkylation of secondary aliphatic amines is provided which consists of reacting a secondary aliphatic amine with at least one hydrogen on the alpha carbon atom of the amino group with an olefine in the presence of an amide of a transition metal.