日本东曹公司计划将其在四日市的乙烯联合装置原料进一步多样化应用,使重石脑油的利用率从目前的50%上升至70%。东曹公司通过更换石脑油裂解炉管等措施,改善了生产系统,于2006年初使重石脑油的利用率升至50%。东曹还将继续研究开发一个利用煤油和重质天然气凝析液(NGLs)的框架 Japan’s Tosoh plans to further diversify its ethylene unit feedstock in Yokkaichi, raising the utilization rate of heavy naphtha from the current 50% to 70%. Tosoh improved its production system by replacing naphtha cracking furnace tubes and increased the utilization of heavy naphtha to 50% by early 2006. Tosoh will also continue to research and develop a framework that utilizes kerosene and heavy natural gas condensates (NGLs)