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    Processes for refining butyl acrylate
    9.
    发明授权
    Processes for refining butyl acrylate 失效
    精制丙烯酸丁酯的方法

    公开(公告)号：US06605738B1

    公开(公告)日：2003-08-12

    申请号：US08859143

    申请日：1997-05-20

    申请人： Fungau Ho ,  Vivek Julka

    发明人： Fungau Ho ,  Vivek Julka

    IPC分类号： C07C6748

    CPC分类号： C07C67/54 ,  Y02P20/582 ,  C07C69/54

    摘要： Crude butyl acrylate streams, e.g., from the reaction of butanol and acrylic acid, are refined using a splitter distillation column to yield a butyl acrylate- and heavies-containing bottoms fraction and an overhead fraction containing dibutyl ether, butyl acetate, butanol and butyl acrylate. The bottoms fraction is then subjected to separation, e.g., by distillation, to separate heavies from the bottoms fractions and to recover butyl acrylate. A process for the production of butyl acrylate is also disclosed, which process comprises not only the above-mentioned refining steps but also includes the steps of withdrawing from the splitter distillation column the overhead fraction and distilling the overhead fraction to recover a bottoms stream containing butanol and butyl acrylate, at least a portion of which could be recycled for reaction with acrylic acid to make butyl acrylate, and recovering the separated heavies, at least a portion of which could be recycled to a reaction zone for the production of butyl acrylate. At least 10,000 lb(avoir) quantities of a butyl acrylate product comprising at least 99.8 wt % butyl acrylate and containing not more than about 200 ppm butyl ether and not more than about 200 ppm butyl acetate are producible.

    摘要翻译： 粗丁基丙烯酸酯流，例如从丁醇和丙烯酸的反应中使用分离器蒸馏塔进行精制，得到含丙烯酸丁酯和重质基的塔底馏分和含有二丁基醚，乙酸丁酯，丁醇和丙烯酸丁酯的塔顶馏分 。 然后将塔底馏分进行分离，例如通过蒸馏分离塔底馏分中的重质物并回收丙烯酸丁酯。 还公开了制备丙烯酸丁酯的方法，该方法不仅包括上述精制步骤，而且还包括从分离器蒸馏塔中抽出塔顶馏分并蒸馏塔顶馏分以回收含有丁醇的塔底物流的步骤 和丙烯酸丁酯，其至少一部分可以再循环用于与丙烯酸反应以制备丙烯酸丁酯，并回收分离的重质物，其至少一部分可以再循环到用于生产丙烯酸丁酯的反应区中。 可生产至少10,000磅（阿维诺）量的包含至少99.8重量％丙烯酸丁酯和不超过约200ppm丁基醚和不超过约200ppm乙酸丁酯的丙烯酸丁酯产物。