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    POLYMERIZATION PROCESS FOR THE SYNTHESIS OF VINYL AROMATIC POLYMERS WITH A CONTROLLED STRUCTURE
    4.
    发明申请
    POLYMERIZATION PROCESS FOR THE SYNTHESIS OF VINYL AROMATIC POLYMERS WITH A CONTROLLED STRUCTURE 有权

    公开(公告)号：US20210371555A1

    公开(公告)日：2021-12-02

    申请号：US17052880

    申请日：2019-05-08

    申请人： VERSALIS S.P.A.

    发明人： Franco Ghelfi ,  Angelo Ferrando ,  Aldo Longo ,  Mirko Boffagni

    IPC分类号： C08F112/08

    摘要： The present invention relates to a polymerization process for the synthesis of vinyl aromatic polymers, in which the sequence of monomers in the chain and the linear, branched soluble, or crosslinked insoluble structure, with reactive or different polarity functions, are controlled. Said process comprises the step of polymerizing vinyl aromatic monomers by means of an Atom Transfer Radical Polymerization (ATRP) reaction with an Activator ReGenerated by Electron Transfer (ARGET), the reaction being carried out at a temperature comprised between 25° C. and 110° C. in an inert gas atmosphere in the presence of a complex catalyst containing a cupric halide and a multidentate amine ligand, feeding to the reaction an organic initiator having two geminal halogens, an alkali metal (bi)carbonate, a solvent pair of an aliphatic alcohol and an acetic ester of the same aliphatic alcohol and possibly ascorbic acid, provided that no initiator is used with three or more active halogens, or polyvinyl monomers or inimers.

    Oxo-Nitrogenated Iron Complex, Catalytic System Comprising Said Oxo-Nitrogenated Iron Complex and Process for the (Co)Polymerization of Conjugated Dienes
    7.
    发明申请
    Oxo-Nitrogenated Iron Complex, Catalytic System Comprising Said Oxo-Nitrogenated Iron Complex and Process for the (Co)Polymerization of Conjugated Dienes 有权

    公开(公告)号：US20210292354A1

    公开(公告)日：2021-09-23

    申请号：US16345015

    申请日：2018-01-18

    申请人： Versalis S.P.A.

    发明人： Anna Sommazzi ,  Pampaloni Guido ,  Giovanni Ricci ,  Francesco Masi ,  Filippo Renili

    IPC分类号： C07F15/02 ,  C08F136/08 ,  C08F136/06 ,  C07C251/08

    摘要： Oxo-nitrogenated iron complex having general formula (I): in which: R1 and R2, identical or different, represent a hydrogen atom; or they are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; R3 represents a hydrogen atom, or it 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, preferably chlorine; or they are selected from. linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR4 groups or —OR4 groups in which R4 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; n is 2 or 3. Said oxo-nitrogenated iron complex having general formula (I) can be advantageously used in a catalytic system for the (co)polymerization of conjugated dienes.

    Process for the production of sugars from biomass derived for guayule plants
    8.
    发明授权
    Process for the production of sugars from biomass derived for guayule plants 有权

    公开(公告)号：US11041178B2

    公开(公告)日：2021-06-22

    申请号：US16760473

    申请日：2018-10-29

    申请人： VERSALIS S.P.A.

    发明人： Ezio Battistel ,  Egidio Viola ,  Ugo De Corato ,  Giacobbe Braccio ,  Valerio Vito

    IPC分类号： C12P19/02 ,  C12P1/02

    摘要： Process for the production of sugars from biomass derived from guayule plants comprising: subjecting said biomass to a biological pretreatment in the presence of at least one ligninolytic fungus obtaining a liquid phase comprising sugars and a first solid residue: subjecting said first solid residue to hydrolysis in the presence of at least one diluted inorganic acid obtaining a first hydrolysate comprising sugars and a second solid residue; subjecting said second solid residue to enzymatic hydrolysis obtaining a second hydrolysate comprising sugars and a third solid residue. The sugars thus obtained can be advantageously used as sources of carbon in fermentation processes for producing alcohols (e.g., ethanol, butanol), lipids, diols (e.g., 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol), or in chemical synthesis processes for producing other intermediates or chemical products (e.g., furfural). Said alcohols and lipids can be advantageously used in turn in the production of biofuels (e.g., biodiesel or “green diesel”), which can be used as such, or mixed with other fuels for transportation, while said diols can be used in the production of products such as bio-butadiene which can in turn be used for manufacturing rubbers (e.g., polybutadiene or copolymers thereof). Said uses are particularly important in the case of a biorefinery.

    Process for separating non-Hevea natural rubber in solid form from solutions including it
    9.
    发明授权
    Process for separating non-Hevea natural rubber in solid form from solutions including it 有权

    公开(公告)号：US10913804B2

    公开(公告)日：2021-02-09

    申请号：US16061948

    申请日：2016-12-13

    申请人： Versalis S.p.A.

    发明人： Tommaso Prando ,  Giovanni Regattieri ,  Maria Parisi ,  Dario Ghidoni

    IPC分类号： C08C1/04 ,  C08C1/14 ,  C08C2/02 ,  C08L7/02 ,  B01D11/02

    摘要： The present invention relates to a process for separating natural rubber deriving from non-Hevea type plants, in the form of solid crumbs, from solutions in an organic solvent system including it, where said organic solvent system may comprise at least one nonpolar organic solvent, or a mixture of at least one nonpolar organic solvent and at least one polar organic solvent, and the concomitant removal of said organic solvent system from said rubber, where the aforementioned process comprises subjecting said solution to a stripping stage by means of water vapor, in presence of a dispersing system, separating the aforementioned crumbs of natural rubber from the liquid phase, obtained through the stripping stage, and subjecting said crumbs to drying.