(上接第11期第40页)如图2和图3,脱水福尔马林分别流228和308,和乙酸被馈送到一个蒸发器,以得到一个气相进料物流。然后气相进料流进料至反应器中,制得丙烯酸酯产物。分离工艺根据本发明,图4示出了使用脱水福尔马林物流的反应和分离工艺流程。如图4所示,丙烯酸酯产品系统400包括脱水区402,反应区404和纯化区 (Continued on page 11, p. 40) As shown in Figures 2 and 3, dehydrated formalin flows 228 and 308, respectively, and acetic acid is fed to an evaporator to provide a vaporous feed stream. The gas-phase feed stream is then fed to the reactor to produce the acrylate product. Separation Process According to the present invention, Figure 4 shows a reaction and separation process using a dehydrated formalin stream. As shown in FIG. 4, the acrylate product system 400 includes a dehydration zone 402, a reaction zone 404, and a purification zone