The present invention relates to a method of preparing an alkyl (meth)acrylate, and more specifically to a method of preparing an alkyl (meth)acrylate which comprises the steps of: carrying out an esterification reaction with reactants comprising an alkanol and (meth)acrylic acid in the presence of an organic acid catalyst with a conversion rate of about 70% or more; supplying reaction products of the esterification reaction to a distillation tower equipped with a reboiler at the lower end to purify them; recovering a upper discharge comprising an alkyl (meth)acrylate and water at the upper part of the distillation tower and recovering a lower discharge comprising high boiling materials and water at the lower part of the distillation tower; separating the lower discharge of the distillation tower into a water layer and an organic layer; and recirculating the water layer separated from the lower discharge so as to be used in the esterification reaction, wherein each of the steps occurs continuously and the lower discharge of the distillation tower includes water in an amount of about 2-25% by weight with respect to the total weight of the lower discharge.
本发明涉及一种制备烷基(甲基)
丙烯酸酯的方法,更具体地涉及一种制备烷基(甲基)
丙烯酸酯的方法,包括以下步骤:在有机酸催化剂的存在下,以烷醇和(甲基)
丙烯酸为反应物进行酯化反应,转化率约为70%或更高;将酯化反应的反应产物供给装有下部再沸器的蒸馏塔以净化它们;在蒸馏塔的上部回收包含烷基(甲基)
丙烯酸酯和
水的上部排放物,并在蒸馏塔的下部回收包含高沸点物质和
水的下部排放物;将蒸馏塔的下部排放物分离成
水层和有机层;并将从下部排放物中分离出的
水层再循环使用于酯化反应中,其中每个步骤均连续发生,蒸馏塔的下部排放物中包含大约相对于总重量2-25%的
水。