Heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid
    1.
    发明授权
    Heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid 有权
    丙烯醛的异相催化部分气相氧化成丙烯酸

    公开(公告)号:US06982347B2

    公开(公告)日:2006-01-03

    申请号:US10806460

    申请日:2004-03-23

    IPC分类号: C07C51/235

    CPC分类号: C07C51/252 C07C57/04

    摘要: In a process for partially oxidizing acrolein to acrylic acid in the gas phase under heterogeneous catalysis, the starting reaction gas mixture is oxidized at an acrolein loading of ≦145 and ≧70 l (STP) of acrolein/l of fixed catalyst bed·h over a fixed catalyst bed which is accommodated in two successive reaction zones A, B, the highest temperature of the reaction gas mixture within reaction zone A being above the highest temperature of the reaction gas mixture within reaction zone B.

    摘要翻译: 在非均相催化下在气相中将丙烯醛部分氧化为丙烯酸的方法中,起始反应气体混合物以丙烯醛负载<= 145和> = 70l(STP)的丙烯醛/ l固定催化剂床进行氧化。 h在固定的催化剂床上,其被容纳在两个连续的反应区A,B中,反应区A内的反应气体混合物的最高温度高于反应区B内的反应气体混合物的最高温度。

    Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid
    4.
    发明授权
    Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid 有权
    将丙烯非均相催化部分气相氧化成丙烯酸

    公开(公告)号:US07019168B2

    公开(公告)日:2006-03-28

    申请号:US10465653

    申请日:2003-06-20

    IPC分类号: C07C51/16 C07C57/02

    CPC分类号: C07C51/252 C07C57/04

    摘要: In a process for partially oxidizing propene to acrylic acid in the gas phase under heterogeneous catalysis, a starting reaction gas mixture comprising propene and oxygen and having a specific composition is oxidized in a first reaction stage over a first fixed catalyst bed having a volume-specific activity which is constant or increases in the flow direction and the acrolein-containing product gas mixture of the first reaction stage is subsequently oxidized in a second reaction stage over a second fixed catalyst bed having a volume-specific activity increasing in the flow direction, and the shaped catalyst bodies of both fixed catalyst beds are annular and each have a specific multimetal oxide composition.

    摘要翻译: 在非均相催化下在气相中将丙烯部分氧化为丙烯酸的方法中,包含丙烯和氧并具有特定组成的起始反应气体混合物在第一反应阶段在具有体积特异性的第一固定催化剂床上被氧化 随后在第二反应阶段,在流动方向上具有体积比活度增加的第二固定催化剂床上氧化第一反应段的流动方向恒定或增加的含丙烯醛的产物气体混合物的活性,以及 两个固定催化剂床的成形催化剂体是环状的,并且各自具有特定的多金属氧化物组合物。