Production process for acrylic acid under controlled temperature conditions
    2.
    发明授权
    Production process for acrylic acid under controlled temperature conditions 有权
    在控制温度条件下丙烯酸的生产工艺

    公开(公告)号:US06462232B1

    公开(公告)日:2002-10-08

    申请号:US09365845

    申请日:1999-08-03

    IPC分类号: C07C51235

    CPC分类号: C07C51/252 C07C57/04

    摘要: Provided is a process for producing acrylic acid stably at a high yield over a long period of time by subjecting acrolein or acrolein-containing gas to catalytic vapor phase oxidation. The above process is characterized by controlling the reaction so that the following equations (1) and (2) are satisfied: 1° C.≦T0−T1≦15° C.  (1) T1

    摘要翻译: 本发明提供通过使丙烯醛或含丙烯醛的气体进行催化气相氧化而长时间稳定地制备丙烯酸的方法。 上述方法的特征在于控制反应,使得满足以下等式(1)和(2):其中T0表示催化剂层入口中的丙烯醛或含丙烯醛的气体的温度; T1表示催化剂层的入口部的温度; T2表示催化剂层的出口部的温度。

    Method for the synthesis of aliphatic carboxylic acids from aldehydes
    3.
    发明授权
    Method for the synthesis of aliphatic carboxylic acids from aldehydes 有权
    从醛合成脂族羧酸的方法

    公开(公告)号:US06800783B2

    公开(公告)日:2004-10-05

    申请号:US10204619

    申请日:2002-09-05

    IPC分类号: C07C51235

    摘要: The invention relates to a method for the synthesis of aliphatic carboxylic acids by the catalytic oxidation of aldehydes with oxygen, or oxygen-containing gas mixtures. Metals of groups 5 11 of the periodic table of elements, or the compounds thereof are used as catalyst, in amounts of up to 5 ppm, based upon the amount of aldehyde used.

    摘要翻译: 本发明涉及通过用氧或含氧气体混合物催化氧化醛来合成脂族羧酸的方法。 基于元素周期表的第5组11的金属或其化合物,以所使用的醛的量为基准,最多可用量为5ppm。

    Method of novel noncatalytic organic synthesis
    5.
    发明授权
    Method of novel noncatalytic organic synthesis 失效
    新型非催化有机合成方法

    公开(公告)号:US06774262B1

    公开(公告)日:2004-08-10

    申请号:US09659821

    申请日:2000-09-11

    IPC分类号: C07C51235

    摘要: The invention provides a method of increasing the reaction rate of an organic synthesis reaction by utilizing supply of OH− from water in the absence of catalyst without adding a basic catalyst in supercritical water or subcritical water of at least 350 ° C., and a method of generating alcohol and carboxylic acid with high reaction rate by performing a Cannizzaro reaction in the absence of catalyst without adding a basic catalyst in supercritical water, and to a method of synthesis of alcohol and carboxylic acid from an aldehyde in the absence of catalyst without adding a basic catalyst near the critical point (375 to 380 ° C., 22.5 to 25 MPa) of supercritical water.

    摘要翻译: 本发明提供了一种通过在不存在催化剂的情况下从水中提供OH而不增加至少350℃的超临界水或亚临界水中的碱性催化剂来提高有机合成反应的反应速率的方法,以及 通过在不存在催化剂的情况下进行坎尼扎罗反应而不在超临界水中添加碱性催化剂的情况下以高反应速度生成醇和羧酸的方法,以及在不存在催化剂的情况下由醛合成醇和羧酸的方法 在临界点附近(375〜380℃,22.5〜25MPa)的超临界水附近不添加碱性催化剂。

    Process for producing acrylic acid
    6.
    发明授权
    Process for producing acrylic acid 失效
    丙烯酸生产工艺

    公开(公告)号:US06657080B2

    公开(公告)日:2003-12-02

    申请号:US09878421

    申请日:2001-06-12

    申请人: Hiromi Yunoki

    发明人: Hiromi Yunoki

    IPC分类号: C07C51235

    CPC分类号: C07C51/252 C07C57/04

    摘要: The invention provides a process which, in producing acrylic acid through vapor-phase catalytic oxidation of acrolein-containing gas using a shell-and-tube type fixed bed reactor, can effectively inhibit occurrence of hot spots and produce acrylic acid at high yields. Said process is characterized by dividing each of the reaction tubes into at least three reaction zones in its axial direction, filling the first reaction zone closest to the gas inlet with a catalyst having a higher activity than that of the catalyst filling the adjacent, second reaction zone and filling the subsequent reaction zones with catalysts of different activity levels such that the catalytic activity successively rises from the second reaction zone toward the gas outlet side.

    摘要翻译: 本发明提供了一种通过使用壳管式固定床反应器通过气相催化氧化含丙烯醛气体来生产丙烯酸的方法,其可有效抑制热点的发生并以高产率生产丙烯酸。 所述方法的特征在于将每个反应管在其轴向方向上分成至少三个反应区域,用最接近气体入口的第一反应区填充具有比填充相邻第二反应物的催化剂活性高的催化剂 并用不同活性水平的催化剂填充随后的反应区,使得催化活性从第二反应区向气体出口侧依次升高。

    Process for producing (meth)acrylic acid

    公开(公告)号:US06664416B2

    公开(公告)日:2003-12-16

    申请号:US10118112

    申请日:2002-04-06

    IPC分类号: C07C51235

    摘要: The present invention produces (meth)acrylic acid in a high yield in a process for producing (meth)acrylic acid by subjecting at least one member selected from the group consisting of (meth)acrolein, propane, and isobutane to catalytic gas phase oxidation with molecular oxygen or a molecular-oxygen-containing gas. In addition, the present invention makes it possible to produce (meth)acrylic acid in a high yield and stably for a long time. The present invention provides a process for producing (meth)acrylic acid by catalytic gas phase oxidation reaction, which is characterized by allowing a reaction gas to contain a reducible compound.