申请人:Takasago International Corporation
公开号:EP0955285A1
公开(公告)日:1999-11-10
This invention relates to a process for producing 5-cyclohexadecen-1-one continuously from 1,2-divinylcyclododecanol in a short time in an efficient manner without no side reaction. In the process, 1,2-divinylcyclododecanol as starting material is supplied from a raw material container 1 by a fixed delivery pump 2 to a flash unit 3 which is vacuumed to 5 mm Hg (666.5 Pa) or less by a vacuum pump 8 and is heated and 1,2-divinylcyclododecanol which is flashed in the flash unit is supplied to a reactor 4 which is heated to 400 to 650°C and vacuumed to 5 mm Hg (666.5 Pa) or less whereby 1,2-divinylcyclododecanol is converted into 5-cyclohexadecen-1-one. The reaction product is discharged from the top of the reactor and is cooled to recover the objective 5-cyclohexadecen-1-one in the recovery container 6. The reduction in the pressure of the apparatus is preferably performed by a vacuum pump 8 via a hydrochloric acid trap 7 comprising, for example, sodium methylate/methanol cooled to -78 to -100°C.
本发明涉及一种以 1,2-二乙烯基环十二醇为原料在短时间内连续生产 5-环 十六烯-1-酮的工艺,生产过程高效且无副作用。在该工艺中,1,2-二乙烯基环十二醇作为起始原料由固定输送泵 2 从原料容器 1 输送到闪蒸装置 3,闪蒸装置 3 通过真空泵抽真空至 5 毫米汞柱(666.闪蒸单元中闪蒸的 1,2-二乙烯基环十二醇被送入反应器 4,反应器 4 被加热至 400 至 650°C,真空度为 5 mm Hg (666.5 Pa) 或更低,1,2-二乙烯基环十二醇由此转化为 5-环十六烯-1-酮。反应产物从反应器顶部排出,冷却后在回收容器 6 中回收目标 5-环十六烯-1-酮。设备的减压最好由真空泵 8 通过盐酸捕集器 7 来完成,盐酸捕集器 7 包括冷却至 -78 至 -100°C 的甲酸钠/甲醇等。