Method for the continuous production of alkyl(meth)acrylates with multiple catalyst recycling
    6.
    发明授权
    Method for the continuous production of alkyl(meth)acrylates with multiple catalyst recycling 有权
    连续生产具有多种催化剂再循环的(甲基)丙烯酸烷基酯的方法

    公开(公告)号:US08461375B2

    公开(公告)日:2013-06-11

    申请号:US10541307

    申请日:2003-11-21

    IPC分类号: C07C67/03

    摘要: The invention relates to an improved method for the continuous production of alkyl(methyl)acrylates by transesterification of methyl(meth)acrylate with alcohols that are heavy in comparison with methanol. A special processing technique makes it possible to obtain new levels of product quality. Very high space-time-overall yields can also be obtained. The invention is characterized by the multiple use of a homogeneous catalyst which thereby reduces the costs of auxiliary agents significantly.

    摘要翻译: 本发明涉及通过甲醇(甲基)丙烯酸酯与甲醇相比重的醇的酯交换连续生产(甲基)丙烯酸烷基酯的改进方法。 特殊的加工技术可以获得新的产品质量水平。 也可以获得非常高的时空总体产量。 本发明的特征在于多次使用均匀的催化剂,从而显着降低助剂的成本。

    Process for preparation of highly pure, non-yellowing methacrylic acid
    7.
    发明授权
    Process for preparation of highly pure, non-yellowing methacrylic acid 有权
    制备高纯度,不变黄的甲基丙烯酸的方法

    公开(公告)号:US09290431B2

    公开(公告)日:2016-03-22

    申请号:US14397295

    申请日:2013-04-22

    摘要: This invention relates to a process of preparing highly pure, non-yellowing (meth)acrylic acid necessary for high-tech applications requiring long-tem color stability in the presence of amines. Process for the preparation of highly pure, non-yellowing (meth)acrylic acid comprising the steps: f) Condensation of a (meth)acrylic acid-containing gas phase obtained via a gas phase oxidation process of a C4-compound to generate an aqueous (meth)acrylic acid solution g) Separation of the (meth)acrylic acid from the aqueous (meth)acrylic acid solution to obtain crude (meth)acrylic acid h) Rectification of the crude (meth)acrylic acid to obtain pure (meth)acrylic acid via a sidestream outlet of the rectification column i) Treatment of the pure (meth)acrylic acid generated in step c) with an ion exchange resin j) Distillation of the (meth)acrylic acid generated in step d).

    摘要翻译: 本发明涉及制备在胺存在下需要长期颜色稳定性的高科技应用所需的高纯度,非黄变(甲基)丙烯酸的方法。 制备高纯度,不变黄(甲基)丙烯酸的方法,包括以下步骤:f)通过C4-化合物的气相氧化方法获得的含(甲基)丙烯酸的气相的缩合产生水 (甲基)丙烯酸溶液g)从(甲基)丙烯酸水溶液中分离出(甲基)丙烯酸,得到粗(甲基)丙烯酸h)精制粗(甲基)丙烯酸,得到纯(甲基) 通过精馏塔的侧流出口进行丙烯酸的处理i)用离子交换树脂处理步骤c)中生成的纯(甲基)丙烯酸j)蒸馏步骤d)中生成的(甲基)丙烯酸。

    PROCESS FOR PREPARATION OF HIGHLY PURE, NON-YELLOWING METHACRYLIC ACID
    8.
    发明申请
    PROCESS FOR PREPARATION OF HIGHLY PURE, NON-YELLOWING METHACRYLIC ACID 有权
    制备高纯度,非黄色甲基丙烯酸的方法

    公开(公告)号:US20150126777A1

    公开(公告)日:2015-05-07

    申请号:US14397295

    申请日:2013-04-22

    IPC分类号: C07C51/47 C07C51/43 C07C51/44

    摘要: This invention relates to a process of preparing highly pure, non-yellowing (meth)acrylic acid necessary for high-tech applications requiring long-tem color stability in the presence of amines. Process for the preparation of highly pure, non-yellowing (meth)acrylic acid comprising the steps: f) Condensation of a (meth)acrylic acid-containing gas phase obtained via a gas phase oxidation process of a C4-compound to generate an aqueous (meth)acrylic acid solution g) Separation of the (meth)acrylic acid from the aqueous (meth)acrylic acid solution to obtain crude (meth)acrylic acid h) Rectification of the crude (meth)acrylic acid to obtain pure (meth)acrylic acid via a sidestream outlet of the rectification column i) Treatment of the pure (meth)acrylic acid generated in step c) with an ion exchange resin j) Distillation of the (meth)acrylic acid generated in step d).

    摘要翻译: 本发明涉及制备在胺存在下需要长期颜色稳定性的高科技应用所需的高纯度,非黄变(甲基)丙烯酸的方法。 制备高纯度,不变黄(甲基)丙烯酸的方法,包括以下步骤:f)通过C4-化合物的气相氧化方法获得的含(甲基)丙烯酸的气相的缩合产生水 (甲基)丙烯酸溶液g)从(甲基)丙烯酸水溶液中分离出(甲基)丙烯酸,得到粗(甲基)丙烯酸h)精制粗(甲基)丙烯酸,得到纯(甲基) 通过精馏塔的侧流出口进行丙烯酸的处理i)用离子交换树脂处理步骤c)中生成的纯(甲基)丙烯酸j)蒸馏步骤d)中生成的(甲基)丙烯酸。