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    ONE-STEP PROCESS FOR PRODUCING DIMETHYL ETHER
    4.
    发明公开
    ONE-STEP PROCESS FOR PRODUCING DIMETHYL ETHER 审中-公开

    公开(公告)号：EP4310068A1

    公开(公告)日：2024-01-24

    申请号：EP22185843.4

    申请日：2022-07-19

    申请人： Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO

    发明人： The designation of the inventor has not yet been filed

    IPC分类号： C07C41/01 ,  C07C43/04 ,  C01B3/00

    摘要： The invention concerns a process for the conversion of ammonia (NH 3 ) and CO x , wherein x = 1-2, to dimethyl ether (DME) wherein a feed comprising NH 3 and CO x , wherein x = 1-2, is provided to a reactor to obtain a reaction product comprising DME, wherein the reactor comprises a catalyst for converting NH 3 to nitrogen (N 2 ) and hydrogen (H 2 ), a catalyst for converting H 2 and CO x , wherein x = 1-2, to DME, and a sorbent material capable of adsorbing water. The invention furthermore concerns a composition a catalyst for converting NH 3 to nitrogen (N 2 ) and hydrogen (H 2 ), a catalyst for converting H 2 and CO x , wherein x = 1-2, to DME, and a sorbent material capable of adsorbing water and the use of that composition in the conversion of ammonia (NH 3 ) and CO x , wherein x = 1-2, to dimethyl ether (DME).

    PROCESS FOR OBTAINING ISOBUTENE FROM A C4-HYDROCARBON MIXTURE
    6.
    发明公开
    PROCESS FOR OBTAINING ISOBUTENE FROM A C4-HYDROCARBON MIXTURE 审中-公开

    公开(公告)号：EP4056549A1

    公开(公告)日：2022-09-14

    申请号：EP21161219.7

    申请日：2021-03-08

    申请人： BASF SE

    发明人： WAGNER, Hans-Guenter ,  THOTLA, Suman ,  HUGO, Randolf ,  WATERS, Gerrit ,  HUEBNER, Michael ,  NEUDERT, Markus ,  ROUSSIERE, Thomas

    IPC分类号： C07C7/148 ,  C07C11/09 ,  C07C7/04 ,  C07C41/06 ,  C07C41/42 ,  C07C43/04

    摘要： The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (8) and a second distillation unit (10), the process comprising:
    (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether as an intermediate product and diisobutene as a byproduct in the etherification unit (3);
    (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), the alkyl tert-butyl ether and diisobutene being withdrawn as the liquid or vaporous bottom product (7), and vaporizing the bottom product (7) if it is withdrawn as a liquid;
    (c) reacting the vaporous bottom product (7) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction products in the ether cleavage unit (8);
    (d) distilling the reaction mixture (9) from the ether cleavage unit (8) in the second distillation unit (10), isobutene being withdrawn as the overhead product (11), the primary alcohol and diisobutene being withdrawn as the bottom product (12) and being recycled to the etherification unit (3);
    the plant further comprising a byproduct separation unit (15) being fed by a bottom purge stream (13) of the first distillation unit (5) and/or by a part of the bottom product of the second distillation unit (10), wherein a diisobutene product stream rich in diisobutene is separated from this feed stream (13, 14).