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对基础烯烃的预测表明，到2005年，丙烯（C3=）的增长率将越过乙烯（C2=）；到2015年；当乙烯消耗预计增加一倍时，还会产生同样的趋势。这将刺激丙烯生产能力的增加。石脑油裂解厂会不断地寻求具有加工弹性、能提高丙烯／乙烯生产比而又不影响乙烯产出的各种方案。烯烃生产厂有几种可能的选择：从FCC轻馏分中分离丙烯，增设丙烷脱氢装置，或者安装乙烯／丁烯复分解装置。本文着重介绍了乙烯／丁烯复分解新工艺。使烯烃生产厂能够回收更多的C3=，而又不损失C2=。通过比较评估了与石脑油裂解相结合的每一种工艺流程。
The forecast for base olefins shows that the rate of increase of propylene (C3 =) will exceed that of ethylene (C2 =) by 2005; the same trend occurs when the consumption of ethylene is expected to double by 2015. This will stimulate the increase of propylene production capacity. Naphtha Cracking Plants continually seek solutions that have the flexibility of processing to increase propylene / ethylene production without compromising ethylene production. There are several possible options for producing olefins: separating propylene from FCC light ends, adding a propane dehydrogenation unit, or installing an ethylene / butene metathesis unit. This article highlights the new ethylene / butylene compound metathesis process. Enable olefins plants to recover more C3 = without loss of C2 =. Each comparison of processes with naphtha cracking was evaluated by comparison.