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    REACTION CONFIGURATION AND PROCEDURE FOR POLYMERS PRODUTION
    73.
    发明申请
    REACTION CONFIGURATION AND PROCEDURE FOR POLYMERS PRODUTION 有权

    公开(公告)号：US20220267482A1

    公开(公告)日：2022-08-25

    申请号：US17252013

    申请日：2019-06-11

    Applicant: VERSALIS S.P.A.

    Inventor： Gianni Marchetti ,  Giovanni Regattieri

    IPC: C08F2/01 ,  C08F2/06

    Abstract: There is a procedure for polymerisation in solution for the production of polymers. The procedure has the following steps: (A) continuously feeding one or more monomers, one or more solvents in a quantity comprised between 70% and 90% by weight with respect to the reagent mixture, and a catalytic system, to a first stirred reaction volume, wherein a single mixing cell is formed, in which the polymerisation begins, until a conversion is attained that varies from 20% to 70% with respect to the final conversion achieved and (B) proceeding the polymerisation in at least one second stirred reaction volume connected in series to the first reaction volume, in which two or more mixing cells are formed, at the outlet of which the final conversion of the monomer is attained. In the first reaction volume, the average residence time of the reagent mixture varies within an interval ranging from 10% to 25% with respect to the average residence time of the entire reaction volume.

    Bis-imine titanium complex, catalytic system comprising said bis-imine titanium complex and process for the (co)polymertzation of conjugated dienes
    74.
    发明授权
    Bis-imine titanium complex, catalytic system comprising said bis-imine titanium complex and process for the (co)polymertzation of conjugated dienes 有权

    公开(公告)号：US11299505B2

    公开(公告)日：2022-04-12

    申请号：US16649131

    申请日：2018-09-28

    Applicant: Versalis S.P.A.

    Inventor： Guido Pampaloni ,  Giovanni Ricci ,  Anna Sommazzi ,  Massimo Guelfi ,  Giuseppe Leone ,  Francesco Masi

    IPC: C07F7/28 ,  C08F4/64 ,  C08F4/642 ,  C08F36/06

    Abstract: Bis-imine titanium complex having general formula (I): wherein: R1 and R2, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C1-C20 alkyl groups, preferably C1-C15, optionally substituted cycloalkyl groups; R3 and R4, mutually identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated, C1-C20 alkyl groups, preferably C1-C15, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X1, X2, X3 and X4, mutually identical or different, represent a halogen atom such as chlorine, bromine, iodine; or are selected from linear or branched C1-C20 alkyl groups, preferably C1-C15, —OCOR5 groups or —OR5 groups wherein R5 is selected from linear or branched C1-C20 alkyl groups, preferably C1-C15; or represent an acetylacetonate group (acac); provided that when R1 and R2 represent a methyl group and X1, X2, X3 and X4 represent a chlorine atom, R3 and R4 are different from 2,6-di-isopropylphenyl.

    Method of regioselective synthesis of polyesters from asymmetric diols
    76.
    发明授权
    Method of regioselective synthesis of polyesters from asymmetric diols 有权

    公开(公告)号：US11155675B2

    公开(公告)日：2021-10-26

    申请号：US16316839

    申请日：2017-07-26

    Applicant: versalis S.p.A.

    Inventor： Mirco Nodari ,  Aldo Longo ,  Martino Colonna ,  Claudio Gioia

    IPC: C08G63/16 ,  C08G63/87

    Abstract: A method for synthesizing regioregular polyesters, starting from asymmetric diols, may provide the polymer ordered structure and advantageous physical-chemical properties. Such methods can make 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, which may have thermal and crystalline properties further ameliorative with respect to non-chiral regioregular polymers.

    Block expandable polymeric compositions
    77.
    发明授权
    Block expandable polymeric compositions 有权

    公开(公告)号：US11078342B2

    公开(公告)日：2021-08-03

    申请号：US16314098

    申请日：2017-07-28

    Applicant: Versalis S.p.A.

    Inventor： Giovanni Cuder ,  Stefano Comba

    IPC: C08J9/14 ,  C08J9/16 ,  C08J9/232 ,  C08J9/00 ,  C08L25/06 ,  C08J9/224 ,  C09D125/06

    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).

    PROCESS FOR PREPARING RANDOM BUTADIENE-ISOPRENE COPOLYMERS HAVING A HIGHT CONTENT OF CIS-1,4 UNITS
    78.
    发明申请
    PROCESS FOR PREPARING RANDOM BUTADIENE-ISOPRENE COPOLYMERS HAVING A HIGHT CONTENT OF CIS-1,4 UNITS 有权

    公开(公告)号：US20210198404A1

    公开(公告)日：2021-07-01

    申请号：US17058413

    申请日：2019-05-29

    Applicant: VERSALIS S.P.A.

    Inventor： Costantino Perretta ,  Silvana Di Martino

    IPC: C08F236/06 ,  C08F236/08 ,  C08F4/54 ,  C08F4/14 ,  C08F2/06 ,  C08K3/04 ,  C08K3/36

    Abstract: Process for preparing a random butadiene-isoprene copolymer having a high content of cis-1,4 units comprising copolymerizing butadiene and isoprene, in the presence of at least one organic solvent, and a catalytic system prepared in situ comprising: (a1) at least one neodymium carboxylate soluble in said organic solvent, containing a variable amount of water, the H2O/Nd molar ratio being between 0.001/1 and 0.50/1; (a2) at least one aluminum alkyl compound; (a3) at least one aluminum alkyl compound containing at least one halogen atom. The random butadiene-isoprene copolymer having a high content of cis-1,4 units obtained from the abovementioned process may be advantageously used in a number of applications ranging from the modification of plastics [for example, obtainment of high impact polystyrene (HIPS)], to the production of tires, in particular the production of tire treads and/or of tire sidewalls.

    PROCESS FOR PRODUCING OLEFINS FROM ALCOHOLS
    80.
    发明申请
    PROCESS FOR PRODUCING OLEFINS FROM ALCOHOLS 有权

    公开(公告)号：US20210147316A1

    公开(公告)日：2021-05-20

    申请号：US16628052

    申请日：2018-07-02

    Applicant: Versalis S.p.A.

    Inventor： Giovanni Antonio FOIS ,  Roberto BUZZONI

    IPC: C07C1/24 ,  C07C29/145 ,  C07C37/08

    Abstract: The invention relates to a process for producing olefins from alcohols by means of catalytic dehydration. More in particular, the present invention relates to a process for producing at least one olefin by dehydrating at least one alcohol having a number of carbon atoms comprised between 2 and 6, preferably comprised between 2 and 4, more preferably at least one alcohol having a number of carbon atoms of 3, even more preferably 2-propanol, in the presence of a catalytic material comprising at least one large pore zeolite in acid form, or predominantly acid form, preferably selected from the group consisting of zeolites having BEA structure, MTW structure and mixtures thereof, and preferably at least one inorganic binder, more preferably alumina. Preferably, the olefin has the same number of carbon atoms as the starting alcohol. Furthermore, preferably the olefin does not contain conjugated double bonds and more preferably the olefin is a mono-olefin. Subject matter of the present invention is also the use of the aforementioned olefin in an alkylation process of aromatic hydrocarbons, in particular the use of propylene for alkylating benzene to provide cumene. The aforementioned cumene can be used in an integrated process for preparing phenol and acetone, in accordance with the Hock method, wherein acetone can be reduced to 2-propanol, to be recycled to the process of the invention to obtain propylene again.

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