Process for preparing acrolein or acrylic acid or a mixture thereof from propane
    6.
    发明授权
    Process for preparing acrolein or acrylic acid or a mixture thereof from propane 有权
    从丙烷制备丙烯醛或丙烯酸或其混合物的方法

    公开(公告)号:US07524987B2

    公开(公告)日:2009-04-28

    申请号:US11505800

    申请日:2006-08-18

    摘要: A process for preparing acrolein, or acrylic acid or a mixture thereof as a target product from propane, in which propane is partially dehydrogenated under heterogeneous catalysis in a reaction zone A, molecular hydrogen thus formed is incinerated partly to water and the product gas A thus formed in reaction zone A is used without secondary component removal to charge a reaction zone B in which propylene present in product gas A is partially oxidized to the target product. From the product gas B formed in reaction zone B, the target product is removed and the residual gas I remaining after an aftertreatment comprising a CO2 scrubbing and a partial discharge thereof is recycled into reaction zone A.

    摘要翻译: 制备丙烯醛或丙烯酸或其混合物作为丙烷的目标产物的方法,其中丙烷在反应区A中在非均相催化下部分脱氢,因此形成的分子氢部分地被焚烧成水,产物气A因此 在反应区A中形成的反应区A被使用,而不需要除去二次分量,从而向产物气体A中存在的丙烯部分氧化成目标产物的反应区B进行充电。 从反应区B中形成的产物气体B中,除去目标产物,并且在包括CO 2洗涤和部分排放的后处理之后残留的残留气体I再循环到反应区域A.

    Method for carrying out the catalytic gas phase oxidation of propene to form acrylic acid
    7.
    发明授权
    Method for carrying out the catalytic gas phase oxidation of propene to form acrylic acid 失效
    进行催化气相氧化丙烯以形成丙烯酸的方法

    公开(公告)号:US06740779B1

    公开(公告)日:2004-05-25

    申请号:US10110227

    申请日:2002-04-22

    IPC分类号: C07C5702

    CPC分类号: C07C51/25 C07C57/04

    摘要: In a process for the two-stage catalytic gas-phase oxidation of propene to acrylic acid, the reaction gas starting mixture is passed, in a tube-bundle reactor, with a propene loading of ≧160 l (S.T.P.) of propene/l·h, first over a fixed catalyst bed 1 present in two successive temperature zones A, B and then over a fixed catalyst bed 2 which is housed either in one further temperature zone C or in two further temperature zones D, E, the temperature of the zone A being kept at a lower temperature than the zone B and the temperature of the zone D at a lower temperature than the zone E.

    摘要翻译: 在将丙烯二阶段催化气相氧化成丙烯酸的过程中,将反应气体起始混合物在管束反应器中以丙烯/丙烯的加入量为约160l(STP)/ 1h 首先在存在于两个连续的温度区域A,B中的固定的催化剂床1上,然后在固定的催化剂床2上,该固定的催化剂床2容纳在一个另外的温度区域C或两个另外的温度区域D,E中, A在比区域B低的温度下保持在比区域B低的温度和区域D的温度。

    Method for purifying acrylic acid and methacrylic acid
    8.
    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。