As caustic solution prewashing of FCC gasoline discharges lots of lye, it is nec essary to improve the process.

• 用苛性碱液对汽油进行预碱洗时易产生大量废碱液，为彻底消除废液提出了用固体碱预处理代替苛性碱液预碱洗的方法。