Abstract: A plastic composition includes plastic material free from halogenated components or with a halogen content less than or equal to 0.5% by mass with respect to the plastic material, oligomers derived from the plastic contained in the plastic material, halogenated salts, and hydrocarbon.

Abstract: A catalyst having coke wherein the coke, upon analysis by infrared spectroscopy in diffuse reflection, has at least two peaks at a wavelength between 1450 cm?1 and 1700 cm?1. The aforesaid catalyst having coke can be advantageously used in a process for the production of a diene, preferably a conjugated diene, more preferably 1,3-butadiene, said process having the dehydration of at least one alkenol having a number of carbon atoms greater than or equal to 4. Preferably, the alkenol having a number of carbon atoms greater than or equal to 4 can be obtained directly from biosynthetic processes, or through catalytic dehydration processes of at least one diol. When the alkenol is a butenol, the diol is preferably a butanediol, more preferably 1,3-butanediol, even more preferably bio-1,3-butanediol, i.e. 1,3-butanediol deriving from biosynthetic processes. When the diol is 1,3-butanediol, or bio-1,3-butanediol, the diene obtained with the process is, respectively, 1,3-butadiene, or bio-1,3-butadiene.

Abstract: There is a process for the hydroconversion of mixtures of polymers or plastics which comprises the pre-treatment of the mixtures through methods selected from mechanical methods, chemical methods, thermal methods, or combinations thereof forming a pre-treated charge. The pre-treated charge is mixed with a hydrocarbon vacuum residue, optionally pre-heated, to form a reactant mixture. The reactant mixture is fed to a hydroconversion section in slurry phase, together with a catalyst precursor containing Molybdenum, and a stream containing hydrogen, forming a reaction effluent. The effluent is separated into at least one high-pressure and high-temperature separator in a vapour phase and a slurry phase. The separate vapour phase is sent to a gas treatment section with the function of separating a liquid fraction from the gas containing hydrogen and hydrocarbon gases having from 1 to 4 carbon atoms; said liquid fraction comprising naphtha, atmospheric gas oil (AGO), vacuum gas oil (VGO).

Abstract: The present invention relates to a process for the dehydration of at least one oxygenated compound, preferably selected from saturated alcohols, unsaturated alcohols, diols, ethers, in the presence of at least one dehydration catalyst selected from cerium oxide (CeO2), aluminium oxide (?-Al2O3), aluminium silicate, silica-aluminas (SiO2—Al2O3), aluminas, zeolites, sulfonated resins, ion-exchange resins, metal oxides (for example, lanthanum oxide, zirconium oxide, tungsten oxide, thallium oxide, magnesium oxide, zinc oxide); of at least one basic agent selected from ammonia (NH3), or from inorganic or organic compounds containing nitrogen capable of developing ammonia (NH3) during said dehydration process; and, optionally, of silica (SiO2), or of at least one catalyst for the dissociation of ammonia (NH3) selected from catalysts comprising silica (SiO2), preferably of silica (SiO2).

Abstract: Process for the production of 1,3-butadiene comprising: feeding a mixture (a) comprising 1,3-butanediol and water to an evaporator, said water being present in an amount of greater than or equal to 5% by weight, preferably ranging from 10% by weight to 85% by weight, more preferably ranging from 15% by weight to 30% by weight, relative to the total weight of said mixture (a), to obtain: (b) a gaseous stream comprising 1,3-butanediol exiting from the top of said evaporator; and, optionally, (c) a blowdown stream exiting from the bottom of said evaporator; feeding said gaseous stream (b) to a first reactor containing at least one dehydration catalyst to obtain (d) a stream comprising alkenols, water and, optionally, impurities and/or unreacted 1,3-butanediol, exiting from said first reactor; optionally, feeding said stream (d) to a first purification section to obtain: (e) a stream comprising alkenols, water, and, optionally, impurities; (f) a stream comprising water and, optionally, impurities and/or unreacted

Abstract: The present invention relates to a process for the dehydration of at least one oxygenated compound, preferably selected from saturated alcohols, unsaturated alcohols, diols, ethers, in the presence of at least one dehydration catalyst selected from cerium oxide (CeO2), aluminium oxide (?-Al2O3), aluminium silicate, silica-aluminas (SiO2-Al2O3), aluminas, zeolites, sulfonated resins, ion-exchange resins, metal oxides (for example, lanthanum oxide, zirconium oxide, tungsten oxide, thallium oxide, magnesium oxide, zinc oxide); of at least one basic agent selected from ammonia (NH3), or from inorganic or organic compounds containing nitrogen capable of developing ammonia (NH3) during said dehydration process; and, optionally, of silica (SiO2), or of at least one catalyst for the dissociation of ammonia (NH3) selected from catalysts comprising silica (SiO2), preferably of silica (SiO2).

Abstract: Process for the production of 1,3-butadiene comprising: feeding a mixture (a) comprising 1,3-butanediol and water to an evaporator, said water being present in an amount of greater than or equal to 5% by weight, preferably ranging from 10% by weight to 85% by weight, more preferably ranging from 15% by weight to 30% by weight, relative to the total weight of said mixture (a), to obtain: (b) a gaseous stream comprising 1,3-butanediol exiting from the top of said evaporator; and, optionally, (c) a blow-down stream exiting from the bottom of said evaporator; feeding said gaseous stream (b) to a first reactor containing at least one dehydration catalyst to obtain (d) a stream comprising alkenols, water and, optionally, impurities and/or unreacted 1,3-butanediol, exiting from said first reactor; optionally, feeding said stream (d) to a first purification section to obtain: (e) a stream comprising al-kenols, water, and, optionally, impurities; (f) a stream comprising water and, optionally, impurities and/or unreact

Abstract: Process for the preparation of vinylaromatic copolymers reinforced with rubber which comprises:a) dissolving a dienic rubber (i) and/or a linear block elastomer, vinylaromatic monomer-1,3 conjugated diene (ii), in a mixture comprising at least one vinylaromatic monomer and a pair of solvents consisting of a polar solvent and a nonpolar solvent;b) polymerizing the solution thus obtained, possibly in the presence of an initiator.

Abstract: Process for the preparation of ABS which comprises:a) preparing a solution consisting of a diblock linear rubber of the type S-B dissolved in a mixture of monomers comprising styrene and acrylonitrile;b) feeding to the solution of step (a) at least one preformed ABS resin having an average volumetric diameter of the rubber particles contained in the polymeric matrix of more than 1.5 .mu.;c) dissolving the preformed ABS in the solution of step (a);d) feeding in continuous the solution thus obtained to a polymerization reactor for ABS resins;e) polymerizing the final solution to produce an ABS with a multimodal morphology.