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    PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES
    2.
    发明申请
    PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES 有权
    连续制备DI-C 3-烷基琥珀酸酯的方法

    公开(公告)号：US20160083328A1

    公开(公告)日：2016-03-24

    申请号：US14888954

    申请日：2014-05-07

    Applicant: BASF SE

    Inventor： Stefanie Demming ,  Suman Thotla ,  Jens Wittenberg ,  Gabriele Iffland ,  Till Christian Brueggemann ,  Yvonne Hoelzl ,  Wolfgang Siegel ,  Stephan Freyer

    IPC: C07C67/08 ,  B01D3/14 ,  C07C67/54

    CPC classification number: C07C67/08 ,  B01D3/141 ,  C07C67/54 ,  C07C69/40

    Abstract: The invention relates to a process for continuously preparing di-C1-3-alkyl succinates by reacting succinic acid with an C1-3-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100° C., wherein a mixture, comprising succinic acid, C1-3-alkanol, mono-C1-3-alkyl succinate, di-C1-3-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C1-3-alkanol to succinic acid added to the mixing zone, and not including the C1-3-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C1-3-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C1-3-alkanol and water are removed in a top draw of the column, di-C1-3-alkyl succinate is removed in a side draw of the column, and wherein mono-C1-3-alkyl succinate and succinic acid are removed in a bottom draw of the column.

    Abstract translation: 本发明涉及一种连续制备二-C1-烷基琥珀酸盐的方法，该方法是在固定床非均相酸性酯化催化剂存在下，在管式反应器中在一定温度范围内使琥珀酸与C 1-3烷醇反应 为60-100℃，其中在混合阶段中形成包含琥珀酸，C 1-3链烷醇，琥珀酸单C 1-3烷基酯，琥珀酸二-C 1-3烷基酯和水的混合物， 进料到管式反应器的入口，并且其中管式反应器的出口流量的5％至75％作为循环物流直接循环到混合阶段，并且加入了C 3-链烷醇与琥珀酸的摩尔比 并且在再循环流中不包括C 1-3链烷醇和琥珀酸，其浓度范围为2.0-9.5。 本发明还涉及一种将琥珀酸酯化为C 3-链烷醇的反应器流出物分离以通过蒸馏得到二-C1-烷基琥珀酸酯的方法，其中分离是在分隔壁塔中进行的，其中在 在柱的顶部萃取中除去C 1-3链烷醇和水，在柱的侧馏分中除去琥珀酸二-C1--3烷基酯，并且其中除去C 1 -C 3烷基琥珀酸酯和琥珀酸单 在列的底部绘制。

    PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES
    3.
    发明申请
    PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES 审中-公开

    公开(公告)号：US20170342015A1

    公开(公告)日：2017-11-30

    申请号：US15659058

    申请日：2017-07-25

    Applicant: BASF SE

    Inventor： Stefanie Demming ,  Suman Thotla ,  Jens Wittenberg ,  Gabriele Iffland ,  Till Christian Brueggemann ,  Yvonne Hoelzl ,  Wolfgang Siegel ,  Stephan Freyer

    IPC: C07C67/08 ,  B01D3/14 ,  C07C67/54 ,  C07C69/40

    CPC classification number: C07C67/08 ,  B01D3/141 ,  C07C67/54 ,  C07C69/40

    Abstract: The invention relates to a process for continuously preparing di-C1-3-alkyl succinates by reacting succinic acid with an C1-3-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100° C., wherein a mixture, comprising succinic acid, C1-3-alkanol, mono-C1-3-alkyl succinate, di-C1-3-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C1-3-alkanol to succinic acid added to the mixing zone, and not including the C1-3-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C1-3-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C1-3-alkanol and water are removed in a top draw of the column, di-C1-3-alkyl succinate is removed in a side draw of the column, and wherein mono-C1-3-alkyl succinate and succinic acid are removed in a bottom draw of the column.

    Process for preparing acrylic acid from formaldehyde and acetic acid
    4.
    发明授权
    Process for preparing acrylic acid from formaldehyde and acetic acid 有权
    从甲醛和乙酸制备丙烯酸的方法

    公开(公告)号：US09546123B2

    公开(公告)日：2017-01-17

    申请号：US14972255

    申请日：2015-12-17

    Applicant: BASF SE

    Inventor： Till Christian Brueggemann ,  Nicolai Tonio Woerz ,  Astrid Ruppel

    IPC: C07C51/00 ,  B01J8/00 ,  C07C51/353 ,  B01J23/22 ,  B01J27/186 ,  C07C57/04 ,  B01J8/02

    CPC classification number: C07C51/353 ,  B01J8/0278 ,  B01J23/22 ,  B01J27/186 ,  B01J27/198 ,  B01J2208/00893 ,  B01J2208/02 ,  C07C51/00 ,  C07C57/04

    Abstract: The present invention relates to a process for preparing acrylic acid from formaldehyde and acetic acid, comprising reacting formaldehyde and acetic acid via an aldol condensation in a reaction unit comprising n reaction zones arranged in series, each comprising an aldol condensation catalyst, where n is at least 2, and wherein at least one stream leaving a reaction zone, before being fed into the reaction zone immediately downstream, is mixed with a stream comprising formaldehyde and optionally comprising acetic acid. The present invention further relates to an apparatus for preparing acrylic acid from formaldehyde and acetic acid and to the use of this apparatus.

    Abstract translation: 本发明涉及一种由甲醛和乙酸制备丙烯酸的方法，包括通过醛醇缩合反应甲醛和乙酸，反应单元包括串联排列的n个反应区，每个反应区包含醛醇缩合催化剂，其中n为 至少2个，并且其中在被直接下游进料到反应区之前离开反应区的至少一个物流与包含甲醛的流和任选地包含乙酸混合。 本发明还涉及一种用于从甲醛和乙酸制备丙烯酸的设备以及使用该装置。

    Process for continuously preparing di-C1-3-alkyl succinates
    5.
    发明授权
    Process for continuously preparing di-C1-3-alkyl succinates 有权

    公开(公告)号：US10047035B2

    公开(公告)日：2018-08-14

    申请号：US15659058

    申请日：2017-07-25

    Applicant: BASF SE

    Inventor： Stefanie Demming ,  Suman Thotla ,  Jens Wittenberg ,  Gabriele Iffland ,  Till Christian Brueggemann ,  Yvonne Hoelzl ,  Wolfgang Siegel ,  Stephan Freyer

    IPC: C07C67/48 ,  C07C67/08 ,  C07C67/54 ,  B01D3/14 ,  C07C69/40

    Abstract: The invention relates to a process for continuously preparing di-C1-3-alkyl succinates by reacting succinic acid with an C1-3-alkanol in the presence of a fixed-bed heterogeneous acidic esterification catalyst in a tubular reactor at a temperature in the range of from 60 to 100° C., wherein a mixture, comprising succinic acid, C1-3-alkanol, mono-C1-3-alkyl succinate, di-C1-3-alkyl succinate and water, is formed in a mixing stage and fed to the entrance of the tubular reactor, and wherein 5 to 75% of the outlet flow rate of the tubular reactor are recycled directly to the mixing stage as a recycle stream, and the molar ratio of C1-3-alkanol to succinic acid added to the mixing zone, and not including the C1-3-alkanol and succinic acid at the recycle stream, being in the range of from 2.0 to 9.5. The invention furthermore relates to a process for separating the reactor effluent of an esterification of succinic acid with an C1-3-alkanol to give di-C1-3-alkyl succinates by distillation, wherein the separation is performed in a divided wall column in which C1-3-alkanol and water are removed in a top draw of the column, di-C1-3-alkyl succinate is removed in a side draw of the column, and wherein mono-C1-3-alkyl succinate and succinic acid are removed in a bottom draw of the column.

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