Temperature measurements in tubular reactors during treatment of fluid masses
    35.
    发明授权
    Temperature measurements in tubular reactors during treatment of fluid masses 有权
    管状反应器在流体质量处理过程中的温度测量

    公开(公告)号:US06657088B2

    公开(公告)日:2003-12-02

    申请号:US09988135

    申请日:2001-11-19

    IPC分类号: C07C4500

    摘要: A method for measuring the temperature of fluid masses being treated in a tubular reactor apparatus which comprises carrying out the treatment in reactor apparatus comprises at least two same-type tubular reactors which are filled with solid particles, at least one tubular reactor containing a temperature measuring unit, the tubular reactors being designed such that both the ratio of the mass of the solid particles to the free cross-sectional area of the respective tubular reactor and the pressure drop measured by an inert gas being conducted transversely to the free cross-sectional area are each substantially identical across the respective tubular reactor. The apparatus is suitable for treating fluid masses while generating or consuming thermal energy, the temperature being measured.

    摘要翻译: 用于测量在管式反应器设备中处理的流体质量的温度的方法包括在反应器设备中进行处理包括至少两个相同类型的管状反应器,其填充有固体颗粒,至少一个管式反应器,其包含温度测量 单元,管式反应器被设计成使得固体颗粒的质量与各管式反应器的自由横截面积的比率和通过惰性气体测量的压降横向于自由横截面积 在相应的管式反应器中各自基本相同。 该装置适用于在产生或消耗热能,待测温度的同时处理流体物质。

    Method for the continuous extraction of (meth)acrylic acid
    36.
    发明授权
    Method for the continuous extraction of (meth)acrylic acid 失效
    连续萃取(甲基)丙烯酸的方法

    公开(公告)号:US07109374B2

    公开(公告)日:2006-09-19

    申请号:US10473102

    申请日:2002-03-28

    IPC分类号: C07C51/42

    摘要: A process for the continuous recovery of (meth)acrylic acid from the reaction gas of a catalytic gas-phase oxidation comprising the following process stages is proposed: I quenching of the reaction gas by evaporative cooling using a high-boiling solvent, II separation of the (meth)acrylic acid from the quenched reaction gas by absorption into the high-boiling solvent, III separation of the solvent laden with (meth)acrylic acid by rectification into a first part-stream IIIA), which contains predominantly (meth)acrylic acid, and into a second part-stream IIIB) which contains predominantly the solvent, IV recycling of the stream IIIB) to process stage II and V distillative production of (meth)acrylic acid from stream IIIA), all liquid residual streams obtained in process stage V being recycled to process stage I.

    摘要翻译: 提出了从包括以下工艺步骤的催化气相氧化反应气体连续回收(甲基)丙烯酸的方法:I通过使用高沸点溶剂的蒸发冷却来淬灭反应气体,II分离 (甲基)丙烯酸通过吸收进入高沸点溶剂从淬灭的反应气体中分离,III分离含有(甲基)丙烯酸的溶剂通过精馏分离成第一部分流IIIA),其主要含有(甲基)丙烯酸 酸,并且进入第二部分流IIIB),其主要包含溶剂,IVB流的再循环),以处理从流IIIA进行的步骤II和V蒸馏生产(甲基)丙烯酸),所有在过程中获得的液体残余流 第五阶段被回收到处理阶段I.

    Method for purifying acrylic acid and methacrylic acid
    39.
    发明授权
    Method for purifying acrylic acid and methacrylic acid 有权
    丙烯酸和甲基丙烯酸的纯化方法

    公开(公告)号:US06596901B1

    公开(公告)日:2003-07-22

    申请号:US09147484

    申请日:1999-01-08

    IPC分类号: C07C5142

    CPC分类号: C07C51/43 C07C57/04

    摘要: A process for preparing acrylic acid or methacrylic acid comprises (a) preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by (b) condensing said product mixture, (c) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (b), and (d) removing the resulting crystals from the mother liquor.

    摘要翻译: 制备丙烯酸或甲基丙烯酸的方法包括(a)制备气态产物混合物,其基本上具有C3- / C4-烷烃, - 烯烃, - 烷醇和/或 - 烷烃的催化气相氧化反应混合物的组成 和/或其前体以形成丙烯酸或甲基丙烯酸,其特征在于(b)冷凝所述产物混合物,(c)从步骤(b)中获得的溶液中结晶丙烯酸或甲基丙烯酸,和(d)除去所得晶体 从母酒。