一、前言1985年10月出光石油化学公司,在出光兴产公司德山炼油厂,应用新技术建立了年产4万吨仲丁醇(简称 SBA)的制造装置。以后该装置进入正常生产。众所周知,SBA 的主要用途是制造甲乙酮(简称 MEK)。该装置生产的 SBA 在脱氢装置中转变成 MEK。MEK 主要用于树脂加工、涂料、胶粘剂等领域。另外,在应用磁带胶等的电子工业中,近年来广泛使用MEK 为溶剂,效果良好。利用丁烯的水合反应可以制造 SBA,但通常采用的方法是使用硫酸的间接水合法。该法有硫酸严重腐蚀装置、废水难以处理等问题。为妥善解决上述问题,必然使工艺流程过于复杂。为此,我公司开展了以杂多酸水溶液为催化剂的直接水合工艺研究。同时,本工艺还着眼于在水合条件(即原料丁烯处于超临 I. Introduction In October 1985, Idemitsu Petrochemical Company set up a manufacturing plant with an annual output of 40,000 tons of sec-butanol (SBA) at the Idesu Petrochemical Refining Factory in Tokushu. After the device into normal production. As we all know, the main purpose of SBA is to manufacture methyl ethyl ketone (MEK). The unit produces SBA converted to MEK in the dehydrogenation unit. MEK is mainly used in resin processing, coatings, adhesives and other fields. In addition, in the electronics industry that uses tape glue, etc., it is effective to use MEK widely as a solvent in recent years. SBA can be made by the hydration reaction of butene, but an indirect hydration method using sulfuric acid is generally used. The law of sulfuric acid serious corrosion device, wastewater difficult to handle and other issues. To properly solve the above problems, it is bound to make the process too complicated. To this end, our company carried out a study of direct hydration process using heteropoly acid aqueous solution as catalyst. At the same time, the process also focuses on hydration conditions (ie, the raw material butene is in supercritical