Abstract: A novel method for preparing crystalline, porous boro-silicates and boron-metal-silicates isostructural with beta zeolite is disclosed.This method makes it possible the times required by the synthesis of such zeolites to be reduced, and said preparations to be carried out with larger reaction volumes.

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: The present invention relates to a process for the oligomerization of light olefins or mixtures thereof, wherein a reaction is brought about between olefins with a carbon number of between 2 and 20 and synthetic zeolites containing silicon, titanium and gallium oxides which in the calcined, anyhdrous state have the following empirical formula:pHGaO.sub.2 .multidot.qZTiO.sub.2 .multidot.SiO.sub.2,where p is of a value greater than zero and less than or equal to 0.050 and q is of value greater than zero and less than or equal to 0.025, with the H.sup.+ of HGaO.sub.2 being at least partly exchangeable or exchanged with cations.

Abstract: The invention discloses a catalyst on the basis of silicon and titanium having the form of microspheres and constituted by oligomeric silica and by titanium-silica-lite crystals having an oligomeric silica/titanium-silicalite molar ratio comprised within the range of from 0.05 to 0.11, wherein the crystals of titanium-silicalite are encaged by means of Si-O-Si bridges.

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 invention discloses a catalyst on the basis of silicon and titanium having the form of microspheres and constituted by oligomeric silica and by titanium-silicalite crystals having an oligomeric silica/titanium-silicalite molar ratio comprised within the range of from 0.05 to 0.11, wherein the crystals of titanium-silicalite are encaged by means of Si--O--Si bridges.

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 is disclosed for oligomerizing light olefins or mixtures thereof, which consists in reacting said olefins, possibly diluted with an inert gas, by means of synthetic zeolites containing oxides of silicon, titanium and iron, having, in their calcined and anhydrous state, the following empirical formula:pHFeO.sub.2. qTiO.sub.2.SiO.sub.2,wherein p has a value larger than zero and smaller than, or equal to, 0.050 and g has a value larger than zero and smaller than, or equal to 0.025, and the H.sup.+ of HFeO.sub.2 can be at least partially substitutable or substituted with cations.

Abstract: A process is disclosed for oligomerizing light olefins or their mixtures, which consists in reacting said olefins, possibly diluted with an inert gas, by means of synthetic zeolites containing oxides of silicon, titanium and aluminum, which have, in their calcined and anhydrous state, the following empirical formula:pHAlO.sub.2 .multidot.qTiO.sub.2 .multidot.SiO.sub.2'wherein p has a vlue larger than zero and smaller than, or equal to, 0.050 and g has a value larger than zero and smaller than, or equal to, 0.025, and the H.sup.+ of HAlO.sub.2 can be at least partially substitutable or substituted with cations.

Abstract: Alkylarylethers are produced in accordance with the invention starting from phenols and ethers of aliphatic alcohols in the presence of amorphous BPO.sub.4, and calcined at a temperature of from 150.degree. C. to 600.degree. C.

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: The invention discloses a catalyst on the basis of silicon and titanium having the form of microspheres and constituted by oligomeric silica and by titanium-silicalite crystals having an oligomeric silica/titanium-silicalite molar ratio comprised within the range of from 0.05 to 0.11, wherein the crystals of titanium-silicalite are encaged by means of Si-O-Si bridges.

Abstract: A process for preparing porous crystalline alumino-silicates consisting of bringing into contact, in an aqueous environment, sodium silicate with an aluminum derivative at a molar SiO.sub.2 /Al.sub.2 O.sub.3 ratio greater than or equal to 8, in the presence of one or more alkaline hydroxides at a molar Me.sup.+ /SiO.sub.2 ratio greater than 0.6, where Me.sup.+ represents the alkaline metal or metals, and in the presence of a mineralizing agent, operating at a temperature of between 20.degree. and 100.degree. C., and controlling the molar OH.sup.- /SiO.sub.2 ratio of the resultant mixture at a value of 0.01 and 0.8, the resultant mixture being crystallized at said molar OH.sup.- /SiO.sub.2 ratio in a closed environment for a period of between some hours and 40 days at a temperature of between 100.degree. and 200.degree. C.

Abstract: Alkylarylethers are produced according to the invention using phenols and ethers of aliphatic alcohols as the starting materials, in the presence of BPO.sub.4.

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.