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    Process for producing dienes
    1.
    发明授权
    Process for producing dienes 有权

    公开(公告)号：US11851385B2

    公开(公告)日：2023-12-26

    申请号：US17787754

    申请日：2020-12-18

    申请人： VERSALIS S.P.A.

    发明人： Talisa Cerasoli ,  Stefano Ramello ,  Monica Vittoria Pastori

    IPC分类号： C07C1/24

    CPC分类号： C07C1/24 ,  C07C2521/04 ,  C07C2521/08

    摘要： A process for producing a diene, preferably a conjugated diene, more preferably 1,3-butadiene, includes the steps of dehydrating at least one alkenol in the presence of at least one catalytic material having at least one acid catalyst based on silica (SiO2) and alumina (Al2O3), preferably a silica-alumina (SiO2—Al2O3), the catalyst having an alumina content (Al2O3) lower than or equal to 12% by weight, preferably between 0.1% by weight and 10% by weight, with respect to the catalyst total weight. The alumina content is referred to the catalyst total weight without binder, and a pore modal diameter between 9 nm and 170 nm, preferably between 10 nm and 150 nm, still more preferably between 12 nm and 120 nm.
    Preferably, the alkenol is obtainable directly from biosynthetic processes, or catalytic dehydration processes of at least one diol, preferably a butanediol, more preferably 1,3-butanediol, still more preferably bio-1,3-butanediol, deriving from biosynthetic processes.

    PROCESS FOR THE PRODUCTION OF SUGARS FROM BIOMASS DERIVED FROM GUAYULE PLANTS
    2.
    发明申请
    PROCESS FOR THE PRODUCTION OF SUGARS FROM BIOMASS DERIVED FROM GUAYULE PLANTS 有权

    公开(公告)号：US20210054468A1

    公开(公告)日：2021-02-25

    申请号：US16964703

    申请日：2019-01-23

    申请人： VERSALIS S.P.A.

    发明人： Stefano Ramello ,  Mario Baldassarre ,  Roberto Buzzoni

    IPC分类号： C13K13/00

    摘要： Process for the production of sugars from biomass derived from guayule plants comprising placing an amount of said biomass (G2) (g) in contact with an amount of water (G1) (g) and with at least one organic acid, and optionally at least one inorganic acid, obtaining a mixture, said at least one organic acid and said at least one inorganic acid optionally present being used in such amounts that the total moles of said at least one organic acid and said at least one inorganic acid optionally present (mTOT) contained in said mixture are calculated according to the following equation (1): mTOT=m1+m2   (1) wherein m1 and m2 are defined according to the following equations (2) and (3), respectively: m1=R1·G1   (2) m2=R2·G2   (3) wherein: R1 (mmol/g) is the ratio between a first amount of said at least one organic acid (mmol) and a first amount of said at least one inorganic acid (mmol) optionally present and the amount of water G1 (g) used, R1 being between 0.06 mmol/g and 0.25 mmol/g, preferably between 0.09 mmol/g and 0.18 mmol/g, said first amount of said at least one organic acid (mmol) and said first amount of said at least one inorganic acid (mmol) optionally present being dependent upon the amount of water G1 (g); R2 (mmol/g) is: in the absence of said at least one inorganic acid, the ratio between a second amount of said at least one organic acid (mmol) and the amount of biomass G2 (g) used; or in the presence of said at least one inorganic acid, the ratio between the sum of said second amount of said at least one organic acid (mmol) and of a second amount of said at least one inorganic acid (mmol) and the amount of biomass G2 (g) used; or in the presence of said second amount of said at least one inorganic acid (mmol) and in the absence of said second amount of said at least one organic acid (mmol), the ratio between said second amount of said at least one inorganic acid (mmol) and the amount of biomass G2 (g) used; said second amount of said at least one organic acid (mmol) and said second amount of said at least one inorganic acid (mmol) being dependent upon the amount of biomass G2 (g); R2 being between 0.90 R (mmol/g) and 1.10 R (mmol/g), preferably between 0.95 R (mmol/g) and 1.05 R (mmol/g), R being determined by the following algorithm (4), said algorithm (4) being obtained through the following elementary operations: (i) preparing a volume V (I) of an aqueous solution of said at least one organic acid and of said at least one first amount of said at least one inorganic acid (mmol) optionally present, said aqueous solution having a pH(1) lower than 7, preferably between 0.7 and 3; (ii) adding an amount of biomass Q (g), dried at 120° C. for 15 hours, to the aqueous solution obtained in (i), said amount of biomass being preferably lower than or equal to 60% by weight, more preferably between 2% by weight and 40% by weight, with respect to the total weight of the mixture obtained; (iii) measuring the pH of the mixture obtained in (ii), said pH being referred to below as pH(2); (iv) determining R according to the following algorithm (4): R=(10−pH(1)−10−pH(2))·1000·V/Q)   (4) wherein pH(1), pH(2), V and Q have the same meanings as above, the above elementary operations being carried out at room temperature; provided that said at least one organic acid is present in an amount such that the RMINIMUM ratio (mmol/g) defined according to the following equation (5): RMINIMUM=mORGANIC ACID/G2   (5) wherein mORGANIC ACID are the mmol of organic acid present and G2 has the same meaning as above, is higher than or equal to 0.20 mmol/g, preferably higher than or equal to 0.25 mmol/g and, if said at least one inorganic acid is present, said mmol of organic acid (mORGANIC ACID) are present in an amount smaller than the sum of the two amounts of acid, that is the sum of the amount of inorganic acid (mmol) and of the amount of organic acid (mmol), said sum corresponding to the total moles MTOT (mmol) as defined in equation (1) above.
    The sugars thus obtained may advantageously be used as sources of carbon in fermentation processes for the production of 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 the production of other intermediates or chemicals. Said alcohols and lipids may in turn advantageously be used in the production of biofuels (e.g., biodiesel or “Green Diesel”), which may be used as such or in blends with other automotive fuels, while said diols may be used in the production of products such as, for example, bio-butadiene, which may in turn be used in the production of rubbers (e.g., polybutadiene or its copolymers). Said uses are particularly important in the case of a biorefinery.

    Process for the production of dienes
    5.
    发明授权
    Process for the production of dienes 有权

    公开(公告)号：US10196326B2

    公开(公告)日：2019-02-05

    申请号：US15544720

    申请日：2016-02-22

    申请人： versalis S.p.A.

    发明人： Stefano Ramello ,  Vittorio Milanesi ,  Roberto Buzzoni

    IPC分类号： C07C1/24 ,  B01J21/12 ,  B01J35/10 ,  B01J37/00 ,  C07C29/60 ,  B01J37/03 ,  B01J37/08 ,  B01J21/08 ,  B01J37/30

    摘要： Process for the production of a diene, preferably a conjugated diene, more preferably 1,3-butadiene, comprising the dehydration of at least one alkenol in the presence of at least one catalytic material comprising at least one acid catalyst based on silica (SiO2) and alumina (AI2O3), preferably a silica-alumina (SiO2-AI2O3), said catalyst having a content of alumina (AI2O3) lower than or equal to 12% by weight, preferably ranging from 0.1% by weight to 10% by weight, with respect to the total weight of the catalyst. Preferably, said alkenol can be obtained directly from biosynthesis processes, or through the catalytic dehydration of at least one diol, preferably a butanediol, more preferably 1,3-butanediol, even more preferably bio-1,3-butanediol, deriving from biosynthesis processes. Preferably, said 1,3-butadiene is bio-1,3-butadiene.

    Process for the production of sugars from biomass
    7.
    发明授权
    Process for the production of sugars from biomass 有权

    公开(公告)号：US09920388B2

    公开(公告)日：2018-03-20

    申请号：US15027193

    申请日：2014-12-10

    申请人： versalis S.p.A.

    发明人： Stefano Ramello ,  Rossella Bortolo

    IPC分类号： C13K1/00 ,  C13K1/02 ,  C13K1/06 ,  C13K13/00

    CPC分类号： C13K1/02 ,  C13K1/06 ,  C13K13/002

    摘要： Process for the production of sugars from biomass including at least one polysaccharide which comprises putting a biomass in contact with an aqueous solution of at least one organic acid having from 1 to 6 carbon atoms, preferably from 1 to 3 carbon atoms, the pH of said aqueous solution being ranging from 0.6 to 1.6, preferably ranging from 0.9 to 1.3. The sugars thus obtained can be advantageously used as carbon sources in fermentation processes for the production of alcohols (e.g., ethanol, butanol), diols (e.g., 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol), lipids, or other intermediates or products. Said alcohols, diols, lipids, or other intermediates or products, can be advantageously used in the chemical industry or in the formulation of fuels for motor vehicles. Said alcohols and said diols can also be advantageously used in the bio-butadiene production.