At the same work condition, the state o recycle pump after adding PBC was compared with the state without PBC, and the results showed the PBC could improved the greasy property of the recycle pump. 在相同的工况下,就浓碱循环泵添加PBC前后使用的状况进行对比,确定了PBC能改善润滑状况和具有较好的减摩抗磨特性。