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    MULTI-ZONED CATALYST SYSTEM FOR OXIDATION OF O-XYLENE AND/OR NAPHTHALENE TO PHTHALIC ANHYDRIDE
    7.
    发明申请
    MULTI-ZONED CATALYST SYSTEM FOR OXIDATION OF O-XYLENE AND/OR NAPHTHALENE TO PHTHALIC ANHYDRIDE 审中-公开

    公开(公告)号：US20180008962A1

    公开(公告)日：2018-01-11

    申请号：US15545532

    申请日：2016-01-14

    申请人： BASF SE

    发明人： DIANA CAROLINA GALEANO NUNEZ ,  Christian WALSDORFF ,  Jurgen ZQHLKE ,  Hans-Martin ALLMANN

    IPC分类号： B01J23/22 ,  B01J37/02 ,  B01J27/198 ,  B01J23/00 ,  B01J35/00 ,  C07D307/89 ,  B01J37/08

    摘要： The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA) comprising at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active material of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %. The present invention further relates to a process for gas phase oxidation in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active materials of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %.

    Process for preparing acrylic acid from methanol and acetic acid
    8.
    发明授权
    Process for preparing acrylic acid from methanol and acetic acid 有权
    从甲醇和乙酸制备丙烯酸的方法

    公开(公告)号：US09593065B2

    公开(公告)日：2017-03-14

    申请号：US14794955

    申请日：2015-07-09

    申请人： BASF SE

    发明人： Lukas Schulz ,  Nicolai Tonio Woerz ,  Tim Blaschke ,  Marco Hartmann ,  Frank Huetten

    IPC分类号： C07C51/347 ,  B01J23/50 ,  B01J27/198 ,  C07C57/04 ,  C07C45/38 ,  C07C51/353 ,  C07C45/32 ,  C07C45/78

    CPC分类号： C07C51/347 ,  B01J23/50 ,  B01J27/198 ,  C07C45/32 ,  C07C45/38 ,  C07C45/783 ,  C07C51/353 ,  C07C57/04 ,  C07C47/04

    摘要： A process for preparing acrylic acid from methanol and acetic acid, comprising (i) contacting a gaseous stream S0 comprising methanol, oxygen and inert gas with an oxidation catalyst to obtain a gaseous stream S1 comprising formaldehyde and inert gas; (ii) removing at least a portion of the inert gas present in S1 from at least a portion of the formaldehyde present in S1 by absorbing this formaldehyde in an absorbent to obtain a gaseous stream S2 comprising the portion of the inert gas removed, and to obtain a stream S3 comprising absorbent and absorbate comprising formaldehyde; (iii) optionally removing a portion or the entirety of the absorbent present in stream S3, such that a stream S3a remains from stream S3, and producing a stream S4 from at least stream S3 or stream S3a and a stream S5 comprising acetic acid; and (iv) contacting stream S4 in gaseous form with an aldol condensation catalyst to obtain a gaseous stream S6 comprising acrylic acid.

    摘要翻译： 一种从甲醇和乙酸制备丙烯酸的方法，包括（i）使包含甲醇，氧气和惰性气体的气流S0与氧化催化剂接触以获得包含甲醛和惰性气体的气流S1; （ii）通过在吸收剂中吸收该甲醛从S1中存在的甲醛的至少一部分除去S1中存在的至少一部分惰性气体，以获得包含去除部分惰性气体的气流S2，并且 获得包含含甲醛的吸收剂和吸收剂的流S3; （iii）任选地除去流S3中存在的吸收剂的一部分或全部，使得流S3a从流S3保留，并从至少流S3或流S3a和包含乙酸的流S5产生流S4; 和（iv）将气态的流S4与醛醇缩合催化剂接触以获得包含丙烯酸的气流S6。