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    Process for producing dienes
    2.
    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 producing dienes
    3.
    发明授权
    Process for producing dienes 有权

    公开(公告)号：US11498887B2

    公开(公告)日：2022-11-15

    申请号：US16339186

    申请日：2017-10-18

    申请人： Versalis S.P.A.

    发明人： Daniele Delledonne ,  Alberto Cesana ,  Marco Mattachini ,  Monica Vittoria Pastori

    IPC分类号： C01C1/24 ,  C07C11/167 ,  C07C1/24 ,  B01J37/03 ,  B01J35/00 ,  B01J23/10 ,  B01J29/08 ,  B01J29/70 ,  B01J37/00 ,  C07C29/60 ,  B01J35/10 ,  B01J37/08 ,  C07C33/03 ,  C12P7/18

    摘要： The present invention relates to a process for producing a diene, preferably a conjugated diene, more preferably 1,3-butadiene, comprising the dehydration of at least one alkenol having a number of carbon atoms greater than or equal to 4, in the presence of a catalytic material comprising at least one crystalline metalosilicate in acid form, preferably a macroporous zeolite, more preferably a zeolite with a FAU, BEA or MTW structure. Preferably, said alkenol having a number of carbon atoms greater than or equal to 4 may be obbtained directly through biosynthetic processes, or through catalytic dehydration processes of at least one diol. When said alkenol is a butenol, said diol is preferably a butanediol, more preferably 1,3-butanediol, even more preferably bio-1,3-butanediol, i.e. 1,3-butanediol deriving from biosynthetic processes. When said alkenol is 1,3-butanediol, or bio-1,3-butanediol, the diene obtained with the process according to the present invention is, respectively, 1,3-butadiene, or bio-1,3-butadiene.