Versalis S.p.a.

Polimeri Europa S.p.a.

Alessandro Casalini

Riccardo Felisari

Olga Valentino

Dario Ghidoni

Aldo Longo

Antonio Ponticiello

Alessandro Del Seppia

Paolo Calaresu

Elena Bencini

Anna Grazia Rossi

Luca Soddu

Giovanni Antonio Fois

Paolo Mariani

Massimo Merlini

Michela Agnoli

Alessandra Simonelli

Leonardo Chiezzi

Attilio Arienti

Luca Monti

Giuditta Vannucci

Fabio Montanari

Gino Goffredi

Romano Lima

Francesco Pasquali

Chiara Cecilia Piseri

Riccardo Inglese

Roberto Lanfredi

Gilberto Frigerio

Dino Ferri

Loreno Loredano Lorenzoni

Maurizio Saiu

Giovanni Rivici

Antonio Palumbo

The present invention relates to an aqueous emulsion comprising: a) from 50% to 60% of an organic phase dispersed in an aqueous phase, said organic phase containing a mixture including from 24% to 30%, calculated with respect to the final emulsion, of ethylene-vinyl acetate copolymers and/or polyalkyl(meth)acrylates, indicated in the present description as polymeric component, and a high-boiling organic solvent, or a mixture of said solvents; b) a primary emulsifier at a concentration higher or equal to 0.1% and lower than or equal to 3% by weight, calculated with respect to the final emulsion; c) from 37% to 47% of an aqueous phase; wherein the ratio between said polymer component and said organic solvent in the final aqueous emulsion is at least 1/1 and where the organic solvent and any polymer of the polymeric component have a Hildebrand solubility parameter &#x3b4; such that, the difference (&#x3b4;&#x3b4;) is lower than 2 in absolute value for any polymer of the polymeric component.

Aqueous emulsions containing ethylene-vinyl acetate copolymers, preparation process thereof and their use as anti-gelling additives of crude oils

A mixture comprising: a) from 0% to 95% of aromatic compounds and/or polycyclic aromatic compounds, said polycyclic aromatic compounds, if present, always being in an amount less than 10% with respect to component (a); b) from 0% to 85% of a mixture containing aliphatic compounds and a content of aromatic compounds lower than 30% with respect to (b); c) from 0% to 20% of an acetate component; d) from 1% to 50% of a mixture of compounds containing keto groups; with the proviso that said solvent mixture contains at least three components, one of which is (d) and the other two selected from (a), (b) or (c) and that their sum is always 00%; and with the proviso that said mixture has a solubility, measured with the Hansen parameters, characterized in that the dispersion force component of the solubility &#x3b4;varies from 17 to 20 Mpathe polar force component of the solubility &#x3b4;varies from 0.65 to 5 Mpa, and the strength of the hydrogen bond component of the solubility &#x3b4;varies from 0.65 to 5 MPa.

Mixture of solvents for removing asphaltenes

A polymeric composition suitable for lowering the Pour Point of paraffinic crude oils comprising a synergic mixture including at least two ethylene-vinyl acetate copolymers respectively having an average molecular weight Mw lower than 130,000 Dalton (measured via GPC), a content of vinyl acetate monomer ranging from 15 to 50% by weight, with the proviso that the content of vinyl acetate monomer in the respective copolymers differs from one copolymer to another, by over 5%, on a weight basis.

Compositions based on ethylene-vinyl acetate copolymers and their use as anti-gelling additives of paraffinic crude oils

The present invention relates to a process for the insertion and conveying of a labile additive, or a mixture thereof, in a transporting pipe, in which a main stream of molten material flows, said process characterized in that it incorporates said additive, or said mixture, in a portion of the pipe delimited by the main stream, according to one of the following alternative modes: a) in a longitudinal direction with respect to the flow direction of the main stream of molten material, or b) in a transversal direction with respect to the flow direction of the main stream of. molten material, or c) according to a composition of the longitudinal (a) and transversal (b) mode, thus forming a resulting stream which keeps the labile additives segregated from the main stream of molten material.

Process for the insertion and conveying of labile additives in streams of molten material

The present invention relates to a self-extinguishing polymeric composition comprising: a) a stabilizing polymeric composition containing i) from 80% to 99.5% by weight of one or more vinylaromatic polymers compatible with each other; and ii) from 0.5% to 20% by weight of at least one block copolymer containing: 1) at least one vinylaromatic polymer block compatible N with (i) and constituting a weight quantity equal to or higher than 15% by weight with respect to the whole block copolymer, and 2) at least one vinyl copolymer block containing epoxy groups so that there is from 0.7% to 19% by weight of oxirane oxygen calculated on the total of block copolymer; and b) from 0.03 phr by weight to 10 phr by weight, calculated on the basis of component (a), of at least one halogenated flame retardant.

Self-extinguishing polymeric composition

A cationic polymerization process for the synthesis of nano-structured polymers containing graphene which comprises reacting graphite oxide dispersed in a solvent by means of ultrasounds, with at least one vinyl monomer and at least one vinyl aromatic monomer, in the presence of at least one strong inorganic acid and suitable for activating a cationic polymerization, wherein: &#x2014;said graphite oxide contains from 5% to 60% by weight of bound oxygen, &#x2014;said vinyl monomer contains at least one carboxylic group wherein the ratio between oxygen bound to the oxide and carboxylic groups ranges from 1:10 to 10:1 in moles per mole, and&#x2014;the ratio between said vinyl aromatic monomer and the sum of the quantity of graphite oxide and vinyl monomer containing carboxylic groups ranges from 50% to 99% by weight.

Cationic polymerization process for the synthesis of nano-structured polymers containing graphene

A particulate polymeric composition capable of being processed to provide expanded articles having a density lower than or equal to 50 g/l and a closed cell content of at least 60% as specified by ASTM D-2856, wherein resulting particulates have a shape factor ranging from 0.6 to 0.99; and wherein the particulate polymeric composition is produced according to a process that prepares expandable granules based on thermoplastic polymers, through a granulation die.

Process for the preparation of granules based on expandable thermoplastic polymers and relative product

A process and device to reduce the pressure of fluid containing liquid and possibly a gaseous phase or solid particles without reducing the cross sectional area or using moving parts. The pressure reduction is obtained by passing the fluid to be depressurized, in sequence, through a plurality of pairs of steps. In the first step of each pair, part of the pressure energy of the fluid is converted to gravitational potential; in the second step the gravitational potential is converted into thermal energy, so as to prevent the reconversion of the same into pressure energy.

Process for the depressurization of fluids and device suitable for the purpose

A process for the production of nano-scaled graphene platelets which comprises: a) putting a graphite material in contact with molecular or atomic oxygen or a substance capable of releasing molecular or atomic oxygen, obtaining a precursor consisting of graphite material functionalized with oxygen groups (FOG), characterized by a carbon/oxygen molar ratio higher than 8:1 b) subsequently, reducing (chemically or physically) said FOG precursor obtaining nano-scaled graphene platelets characterized by a carbon/oxygen molar ratio higher than 20:1.

Process for the preparation of nano-scaled graphene platelets with a high dispersibility in low-polarity polymeric matrixes and relative polymeric compositions

Process for the alkylation of aromatic hydrocarbons by means of aliphatic alcohols containing from 1 to 8 carbon atoms, which comprises feeding the hydrocarbon and alcohol to the head of a fixed-bed reactor, operating with 'trickle flow' regime, containing at least one layer of a catalyst comprising a zeolite selected from medium-pore zeolites and large-pore zeolites.

Process for the alkylation of aromatic hydrocarbons with C1-C8 alcohols

Process for the alkylation of aromatic hydrocarbons by means of olefins containing from 2 to 8 carbon atoms, which comprises feeding the hydrocarbon, olefin, and possibly water, to the head of a fixed-bed reactor, operating with a 'trickle flow' regime, containing at least one layer of a catalyst comprising a medium-or large-pore zeolite.

Process for the alkylation of aromatic hydrocarbons with olefins

Nanocomposite compositions based on expandable thermoplastic polymers which comprise: a) a polymeric matrix produced by the polymerization of a base comprising one or more polymerizable monomers; b) 1-10% by weight, calculated with respect to the polymer (a), of an expanding agent englobed in the polymeric matrix; c) 0.004-15% by weight, calculated with respect to the polymer (a), of an athermanous filler comprising nano-scaled graphene plates with a thickness (orthogonal to the graphene sheet) not greater than 150 nm, an average dimension (length, width, or diameter) not greater than 10 micrometers and a surface area&#x3e;50 m2/g.

Expandable thermoplastic nanocomposite polymeric compositions with an improved thermal insulation capacity

A process for the continuous production of granules based on thermoplastic polymers includes at least one expandable agent and, optionally, other polymers or additives, among which inorganic pigments insoluble in the polymeric matrix, wherein a first main stream is prepared, in the molten state, and a second stream in the molten state, which englobes the additives and which is added to the first stream. The mixture is extruded through a die which is cooled by means of water jets from nozzles positioned behind the cutting blades.

Butadiene is anionically polymerized (or block copolimerized with styrene) in a low-boiling non-polar solvent in presence of rganolithiura compounds. At the end of the polymerization, the non-polar solvent is switched with styrene and the new solution is stored in tanks in relation to the type of polybutadiene (or its block copolymer with styrene) obtained. The polybutadiene solution (and/or its block copolymer with styrene) with the desired set of properties is then fed to a production plant of high impact vinyl aromatic (co)polymers.

Semi-continuous integrated process for the production of high impact vinyl aromatic (co)polymers by anionic/radical polymerization in sequence

Expandable particle composite material suitable for the preparation of expanded materials having a density lower than 40 g/l and a content of closed cells of at least 60%, including heterophase cavities and/or heterophase domains, whose matrix is a synthetic thermoplastic resin having at least 60% by weight of a vinyl aromatic polymer and in which an expanding system is contained, together with a heterogeneously distributed graphite material, having a graphitization degree, calculated by means of the Maire and Mering formula, of at least 0.2.

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Mantova, Italy

Alessandro Casalini