Abstract: The application relates to an expandable polymeric composition with an enhanced processability, which comprises a polymeric base, an expanding agent, and an additive with a plasticizing effect; said polymeric composition being characterized in that: the molecular mass at the maximum peak Mp of (i) ranges from 130 kDa to 190 kDa and the centrifugal average molecular mass Mz of (i) ranges from 430 kDa to 900 kDa, the difference in the glass-transition temperature (DTg) measured between a vinyl aromatic polymer having a molecular weight distribution (MWD) of (i) and composition of the vinyl aromatic fraction alone of (i), and a polymeric composition consisting of (i) and (iii), ranges from 1° C. to 8° C.

Abstract: The present invention belongs to the field of polymer synthesis. In particular, the present invention relates to a method for the synthesis of regioregular polyesters, wherein the polymer ordered structure provides them with advantageous physical-chemical properties, starting from asymmetric diols. More particularly, by the method of the present invention it is possible to obtain regioregular polyesters having high glass transition temperatures Tg and crystalline properties. In the case in which the asymmetric diols are used in a pure enantiomeric form, with respect to the chiral carbon bound to the secondary hydroxyl, through the above-mentioned method it is possible to obtain regioregular and stereoregular polyesters, characterized by thermal and crystalline properties further ameliorative with respect to non-chiral regioregular polymers.

Abstract: The present invention relates to vinyl polymers having certain characteristics which confer flame-retardant properties to the polymer and their polymeric compositions with other vinyl polymers.

Abstract: Disclosed are nitrogen titanium complexes having general formula (I) or (II). Catalytic systems that include the nitrogen titanium complexes and that can be used for the (co)polymerization of conjugated dienes are disclosed. Processes for (co)polymerization of conjugated dienes using the catalytic systems are also disclosed.

Abstract: The present invention relates to the industrial sector of extracting and processing natural rubber, and other components, from plant material. In particular, the invention relates to a process for extracting latex, resin and rubber from guayule and/or guayule-type plants, which comprises harvest, preservation, mechanical and chemical treatment of the plant parts, which is applicable both in the laboratory and on an industrial scale and is characterised by significantly high yields and high quality of the extracted products.

Abstract: The present invention relates to a variant of oleaginous yeast of the species Trichosporon oleaginosus characterized by mutations affecting cell wall synthesis that change the morphology thereof with respect to the wild-type strain of the same species. In particular, thanks to said mutations, cell aggregates are formed which, with respect to the wild-type strain of the same species, lower the viscosity of the culture broth, are more easily separable therefrom and thus make their recovery easier. Said variant of oleaginous yeast of the species Trichosporon oleaginosus is also characterized by yields of oleaginous cellular biomass and intracellular accumulation of lipids that are similar or even higher than those of the wild-type strain. Further, the present invention relates to a process for the production of lipids through said variant of oleaginous yeast of the species Trichosporon oleaginosus.

Abstract: The present invention relates to a catalytic composition which comprises microspheroidal alumina and an active component containing a mixture comprising Gallium and/or Gallium oxides, Tin and/or Tin oxides, a quantity ranging from 1 ppm to 500 ppm with respect to the total weight of the catalytic composition of platinum and/or platinum oxides, and oxides of alkaline and/or alkaline earth metals.

Abstract: Vanadium pyridine-imine complex having general formula (I), wherein: —R1, R2, R3, R4, R5 and R6, equal to or different from each other, represent a hydrogen atom; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, optionally halogenated cycloalkyl groups optionally substituted, aryl groups optionally substituted; —X1, X2 and X3, equal to or different from each other, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, —OCOR7 groups or —OR7 groups wherein R7 is selected from linear or branched C1-C20 alkyl groups, preferably C1-C15; —Y is selected from ethers such as, for example, diethylether, tetrahydrofuran (THF), dimethoxyethane, preferably is tetrahydrofuran (THF); —n is 0 or 1. Said vanadium pyridine-imine complex having general formula (I) can be advantageously used in a catalytic system for the (co) polymerization of conjugated dienes.

Abstract: Process for the preparation of (co) polymers of conjugated dienes comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one vanadium bis-imine complex having the general formula (I): wherein: m is 0 or 1; Z represents a —CR5R6 group wherein R5 and R6, equal to or different from each other, represent a hydrogen atom; or a C1-C20 alkyl group, preferably C1-C15, linear or branched; or a bivalent aromatic group optionally substituted; R1 and R2 equal to or different from each other, represent a hydrogen atom; or they are selected from C1-C20 alkyl groups, preferably C1-C15, linear or branched, optionally halogenated, cycloalkyl groups optionally substituted; or R1 and R2, may be optionally bound each other so as to form, together with the other atoms which they are bound to, a cycle containing from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted by C1-C20 alkyl groups, preferably C1-C15, linear or branched, said cycle optio

Abstract: It is disclosed an apparatus for separating a least one solid from a solids/fluid mixture, said apparatus comprising a separation chamber and a cushion chamber. The separation chamber comprises a top end, a bottom end, at least one wall, and an inlet port for introducing the solids/fluid mixture, said inlet port having an inlet port vector. The cushion chamber comprises at least one boundary wall, and it is adapted to maintain a cushion of the solids/fluid mixture at an intersection of the inlet port vector and the cushion chamber when the separation chamber and the cushion chamber are connected by a communication port at the intersection of the inlet port vector and the at least one wall. The communication port has an area at least a size of an impact area of the solids/fluid mixture on the at least one wall. The communication port may be formed by the erosion of the at least one wall of the separation chamber caused by the solids/fluid mixture at the impact area.

Abstract: Hydrogenated polymers with a radial structure having a core made up of calixarenes of the general formula (I), to the core of which is linked a number P of hydrogenated linear polymer segments selected from: —hydrogenated homopolymers or copolymers of conjugated dienes; or —hydrogenated copolymers of said conjugated dienes and monoalkenyl arenes, and —mixtures thereof said formula (I) in which: —R1, R2, R3 and R4 are independently selected from hydrogen; a group containing carbon and hydrogen; a group also containing heteroatoms in addition to carbon and hydrogen; a group also containing silicon in addition to carbon, hydrogen and heteroatoms; —one of the two substituents R5 and R6 is hydrogen, while the other may be hydrogen or alkyl, with a number of carbon atoms between 1 and 6, preferably methyl and ethyl; —n is an integer in the range between 4 and 16.

Abstract: Method for the separation of at least one isoprenic constituent from the resin of a plant of guayule and/or of the guayule type comprising the steps of: a) providing a defatted resin of guayule and/or of the guayule type; b) subjecting the defatted resin to partitioning of the liquid-liquid type with solvents that are immiscible in each other thus obtaining an apolar extract containing the isoprenic constituents guayulin A, guayulin B and argentatin B; and a polar extract containing the isoprene constituents argentatin A, argentatin C and argentatin D; and c) separating at least one isoprenic constituent from said polar extract and/or from the apolar extract thus obtained, wherein step c) comprises a step in which the polar extract is subjected to partitioning of the liquid-liquid type with solvents immiscible in each other and/or a step in which the apolar extract is subjected to partitioning of the solid-liquid type.

Abstract: Process for the preparation of syndiotactic 1,2-polybutadiene comprising polymerising 1,3-butadiene in the presence of a catalytic system comprising: —at least one pyridyl iron complex having the general formula (I), in which: —R1 represents a hydrogen atom; or a methyl group; —R2 represents a hydrogen atom; or is selected from linear or branched C1-C10, preferably C1-C3, alkyl groups; —X, identical or different to one another, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched, C1-C20, preferably C1-C15, alkyl groups, —OCOR3 groups or —OR3 groups in which R3 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; —n is 2 or 3; —at least one aluminoxane having the general formula (II), (R4)2-AI-O-[-AI(R5)—O-]m-AI-(R6)2 (ll) in which R4, R5 and R6, identical or different to one another, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or are selected from linear or branched

Abstract: Ammoximation reactor for cyclohexanone oxime production comprising: (a) a reactor vessel provided with a stirrer; (b) an internal filtering system; (c) an internal liquid ammonia evaporation coil; (d) an internal gaseous ammonia toroidal distributor; (e) an external cyclohexanone toroidal distributor; (f) an internal hydrogen peroxide toroidal distributor; (g) an internal cylindrical draft tube; (h) an external cooling jacket. Said ammoximation reactor allows to obtain a better mixing of the components of the ammoximation reaction and to maximize both the heat-transfer coefficients and the mass-transfer coefficients. Moreover, said ammoximation reactor allows to increase the packing time of the catalyst used in the ammoximation reaction on the filtering system (i.e. the plugging phenomena) so as to avoid the necessity of carrying out the backwashings with nitrogen.

Abstract: The present invention relates to a dehydrogenation process starting from reagents selected from single butenes, or mixtures thereof, or mixtures of butenes with butanes, to give 1-3 butadiene using catalytic composition of microspheroidal alumina and an active component containing a mixture comprising Gallium and/or Gallium oxides, Tin and/or Tin oxides, a quantity ranging from 1 ppm to 500 ppm with respect to the total weight of the catalytic composition of platinum and/or platinum oxides, and oxides of alkaline and/or alkaline earth metals.

Abstract: An improved solid Ziegler-Natta type catalyst for the (co)polymerisation of ethylene and ?-olefins, particularly in high-temperature processes, such as for example adiabatic solution processes and high-pressure adiabatic processes with elevated productivity, is provided. Said catalyst is obtained by means of an original process comprising dissolving in hydrocarbons, compounds of titanium, magnesium and optionally a metal selected from hafnium and zirconium, and reprecipitating them in two steps in succession, the first of which is chlorination and the second reduction.

Abstract: The present invention relates to an expandable polymeric composition that comprises: a) from 60% to 88% by weight of a vinyl aromatic polymer and/or copolymer, calculated respect to (a)+(b); b) from 12% to 40% by weight of a block copolymer, containing at least one vinyl aromatic polymer and/or copolymer and at least one hydrogenated diene polymer, calculated respect to (a)+(b); c) from 3 parts to 10 parts by weight of a blowing agent, calculated on 100 parts of (a)+(b).

Abstract: A process for preparing conjugated diene (co)polymers comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising: (a) at least one pyridyl iron (III) complex having general formula (I) or (II): wherein: —R1, R2, R3 and R4, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —R5 represents a hydrogen atom, or is selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR6 groups or —OR6 groups wherein R6 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Abstract: The present invention relates to a rotor that comprises a series of shaped rotor blades whose circumferential section forms a standard NACA four-digit airfoil. Said rotor can be inserted in a stirring device that also comprises a stator, on whose inner surface shaped stator blades are positioned, whose circumferential section forms a standard NACA four-digit airfoil.

Abstract: 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.