Abstract: A process is described for the preparation of phenol by the hydrodeoxygenation of polyhydroxylated benzene derivatives or by the selective hydroxylation of benzene under depletive conditions, characterized in that the above-mentioned reactions are carried out in the presence of a catalyst based on multi component metal oxides comprising at least one metal selected from the groups VB, VIB, VIII, IB, IIB, IVA, VA.

Abstract: A process is described for the preparation of a heterogeneous catalyst containing rhecnium as active component and C)an inert carrier medium. characterized in that said inert carrier is previously treated with a silanizing compound containing chlorine, before the laying of the active component on the carrier, and the activation of the heterogeneous catalyst takes place by means of thermal treatment followed by a rapid final cooling. The catalyst is particularly active in metathesis reactions of olefins.

Abstract: Process in two steps for the preparation of 1-octene starting from butadiene which comprises: a first step (a) in which the bis-hydrodimerization of butadiene to 1,7-octadiene is effected in the presence of a catalyst based on a palladium complex containing one or more tri-substituted monodentate phosphines, in an aprotic polar solvent optionally containing an organic base; a second step (b) in which the partial catalytic hydrogenation of 1,7-octadiene to 1-octene is effected, the above process being characterized in that: (i) in the first step the aprotic polar solvent is selected from disubstituted cyclic ureas; (ii) in the second step the catalyst is selected from non supported ruthenium complexes having general formula (II): RuXmLn (II).

Abstract: A method is described for the preparation of 1-octene starting from butadiene, wherein in a first step (a) the bis-hydrodimerization of butadiene to 1,7-octadiene is effected in the presence of a catalyst based on palladium containing one or more tri-substituted monodentate phosphines, in an aprotic polar solvent, in a second step (b) the partial catalytic hydrogenation of 1,7-octadiene to 1-octene is effected in the presence of a titanium compound activated with one or more metal alkyls of group 13 (selected from boron, aluminum, gallium, indium).

Abstract: The present invention relates to solid base catalysts consisting of an amorphous material obtained from a silica or alumina gel containing an alkaline, earth-alkaline or transition metal (M), characterized by a molar ratio between metal (M) and Si or Al ranging from 30:1 to 0.0001:1, a surface area ranging from 100 to 600 m2/g, an overall pore volume ranging from 0.1 to 1.1 ml/g, an average channel diameter ranging from 30 to 150 ? and a density of the base sites ranging from 10 to 900 ?mol/g. Said catalysts can be conveniently used in base catalysis reactions.

Abstract: Device for the hot granulation of thermoplastic polymers, optionally expandable, which comprises: a) a die (1) containing a series of small plates (6), equipped with a series of extrusion holes, and a plurality of feeding ducts (3) situated inside the die body (2) in correspondence with the perforated small plates (6), lined with a material having a high thermal conductivity (4); b) a cutting chamber comprising a set of spraying nozzles (17) which create a jet of drops of a thermostat-regulating liquid for cooling the cut granules; c) a cutting system comprising a cutting plate (13) supporting a set of knives (15) arranged so that the cutting profile of the knife is radial with respect to the die.

Abstract: Process for the preparation of stable nitroxide radicals (I) starting from N-benzylphthalimide in three steps. In the first step, the N-benzylphthalimide is transformed into N-benzyl-1,1,3,3-tetralkylisoindoline by treatment with a Grignard reagent prepared in methyl-tert-butyl ether In the second step, the N-benzyl-1,1,3,3-tetraalkylisoindoline is transformed into 1,1,3,3-tetra-alkylisoindoline by hydrogenolysis. In the third step, the 1,1,3,3-tetra-alkyl-isoindoline is transformed into the nitroxide radical by oxidation with hydrogen peroxide in the presence of a catalyst selected from acids and salts of polymolybdic or polytungstic acids.

Abstract: The invention relates to a process for the production of linear alkanes, containing less than 6? carbon atoms, from a mix comprising one or more hydrocarbons containing at least 6 carbon atoms. The process uses a catalytic composition comprising particular combinations of a Y-type zeolite, at least one element selected from Zn, Mo, Cu, Ga, In, W, Ta, Zr, Ti, metals of Group VIII and optionally one or more lanthanides.

Abstract: The invention relates to a multi-step chemical transformation process for the production of 2,6-dimethylnaphthalene starting from one or more naphthalene hydrocarbons or hydrocarbon blends containing the same, one or more benzene hydrocarbons and, optionally, a methylating agent reacted in the presence of a catalyst containing a zeolite belonging to the MTW structural group, where hydrogen is fed in at least one of the steps.

Abstract: The invention relates to a continuous process for the preparation of phenol by means of the direct oxidation of benzene with hydrogen peroxide in the presence of a catalyst based on titanium silicalite TS-1 comprising: (a) running the process in a fixed bed reactor containing the catalyst based on TS-1 at a temperature ranging from 80-120° C. and at a pressure ranging from 3-15 atm; (b) feeding to the reactor a stream containing H2O2, benzene, sulfolane and water in a single or double phase, wherein the quantities of the single components are within the range of 0.2-6, 15-60, 30-80, 0.5-30 parts by weight, respectively, for every 100 units fed and whose total flow rate is calculated so that the residence time in the reactor (defined as the ratio between the quantity of catalyst by weight and the feeding flow rate) ranges from 0.3 to 2 min; (c) recovery of the products, by-products and solvent from the liquid stream leaving the reactor.

Abstract: Expandable vinylaromatic polymers which comprise: a) a matrix obtained by polymerizing 50-100% by weight of one or more vinylaromatic monomers and 0.50% by weight of a copolymerizable monomer; b) 1-10% by weight, calculated with respect to the polymer (a), of an expanding agent englobed in the polymeric matrix; c) 0.05-25% by weight, calculated with respect to the polymer (a), of an inorganic filler homogeneously distributed in the polymeric matrix with a substantially spherical granulometry, an average diameter ranging from 0.01 to 100 ?m, a refraction index higher than 1.6 and a white index, as defined in “Colour Index” (third edition published by the Society of Dyers and Colourists, 1982), equal to or lower than 22.

Abstract: A process is described for the purification of lanthanide carboxylates which comprises a step in which the hydrocarbon solution deriving from the synthesis of lanthanide carboxylate, containing said carboxylate and impurities of the corresponding carboxylic acid and/or water, is treated with an aqueous solution of a base in order to obtain a pH of the aqueous phase ranging from 9.0 to 12.2 and/or a step in which the hydrocarbon solution containing lanthanide carboxylate is treated with a solid selected from Na2SO4, MgSO4, Mg(ClO4)2, molecular sieves 3 ?, molecular sieves 4 ?, molecular sieves 5 ? and molecular sieves 13 X. Analytical methods are also described, which allow the purity of the lanthanide carboxylates to be non-destructively measured.

Abstract: A process is described for the preparation of ethylene copolymers having a wide molecular weight distribution, characterized in that it is carried out in the presence of meso- and rac-stereoisomeric mixtures of metallocene compounds having general formula (I), wherein A? and A?, the same or different, are a radical of the ??5-tetrahydroindenyl type (Ia)

Abstract: Process for the preparation of block copolymers, based on vinylaromatic monomers and monomers deriving from (meth)acrylic acid by means of radicalic polymerization which comprises polymerizing the monomers at a temperature higher than or equal to 120° C., in the presence of a radicalic initiating system comprising a compound having general Formula (I).

Abstract: Process in continuous carried out in the presence of at least two reactors in series, for the preparation of statistical vinyl arene/conjugated diene copolymers, the vinyl arene content ranging from 15 to 50% by weight, by means of the copolymerization under isothermal conditions in a hydrocarbon solvent, at a temperature ranging from 30 to 120° C., of vinyl arene/conjugated diene monomers, in the presence of at least one initiator and a 2-methoxy ethyl tetra-hydrofuran (THFA-ethyl) modifier.

Abstract: A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way, comprising the dissolving of an elastomer, such as polybutadiene, in a mixture consisting of a monomer and of a solvent in the presence of a polymerization catalytic system, which comprises an initiator of free radicals and a stable initiator of free radicals. The mixture obtained in this way is heated to a temperature of about 100° C. to functionalize the rubber, then more monomer is added and the temperature is raised to start the polymerization reaction.

Abstract: Process for the catalytic hydrodealkylation alone of hydrocarbons, comprising C8-C13 alkylaromatic compounds, optionally mixed with C4-C9 aliphatic and cycloaliphatic products, which comprises treating said hydrocarbon compositions, in continuous and in the presence of hydrogen, with a catalyst consisting of a ZSM-5 zeolite, as such or in a bound form, wherein the Si/Al molar ratio in the ZSM-5 ranges from 5 to 35, modified with at least one metal selected from those belonging to groups IIB, VIB, VIII, at a temperature ranging from 400 to 650° C., a pressure ranging from 2 to 4 MPa and a H2/charge molar ratio ranging from 3 to 6.

Abstract: Process for the catalytic hydrodealkylation alone of hydrocarbon compositions comprising C8-C13 alkylaromatic compounds, optionally in a mixture with C4-C9 aliphatic and cycloaliphatic products, including the treatment in continuous of said hydrocarbon compositions, in the presence f water, with a catalyst consisting of a ZSM-5 zeolite as such or in bound form, wherein the molar ratio Si/Al in the ZSM-5 ranges from 5 to 35, modified with at least one metal selected from those belonging to groups IIB, VIB and VIII, at a temperature ranging from 400 to 700° C., a pressure of between 2 and 4 MPa, a molar ratio between water and the charge in the feed to the reactor ranging from 0.0006 to 0.16 (i.e. between 0.01 and 2.5% w/w) and a molar ratio H2/charge of between 3 and 6.

Abstract: A method is described for the preparation of 1-octene starting from butadiene, wherein in a first step (a) the bis-hydrodimerization of butadiene to 1,7-octadiene is effected in the presence of a catalyst based on palladium containing one or more tri-substituted monodentate phosphines, in an aprotic polar solvent, in a second step (b) the partial catalytic hydrogenation of 1,7-octadiene to 1-octene is effected in the presence of a titanium compound activated with one or more metal alkyls of group 13 (selected from boron, aluminum, gallium, indium).

Abstract: The present invention relates to a process for the preparation of zeolitic catalysts of the MFI type in spheroidal form. The process consists in emulsifying and consolidating in paraffinic hydrocarbons, in the presence of a non-ionic surface-active agent or a suitable combination of a non-ionic surface-active agent and a cationic surface-active agent, a dispersion of particles of zeolitic material of the MFI type in a silica sol.