The suitable add amount of inhibitor was 400ppm when rectifying raw monomer and the feasible lye was 6%oNa2CO3 when using alkali to wash.

• 对裂解粗单体精馏时，阻聚剂的适宜加入量为400PPM，碱洗时适宜的碱液为6‰Na_2CO_3。