Abstract: Filtration and separation，as one of the basic chemical production processes，is indispensable in the inorganic salt industry.Cleaner production has special requirements for filtration and separation process，such as，adopting advanced technology，high-efficient integrated separation equipment，new filtration medium，and environment friendly post-treatment technology，and ensuring the process with high efficiency and energy saving. The application of cleaner production technology in the separation of chlor-alkali salt silt and tailings pulp was studied. The most appropriate initial press point was obtained in the industrial press filtration test so as to make sure that the separation effect was the best，time was the shortest，and filter cake liquid content was the lowest.In view of the properties of flotation tailings of bauxite，the optimum conditions and methods for the tailings treatment and water reuse were investigated by adopting different pretreatment methods，for example，filter aid，coagulation-flocculation， and aggregation etc..The process was proved with high treatment capacity and good industrial application effect. Meanwhile，water reuse could meet the national standard. Therefore，it could be used for the reference of industrial production.

Key words: filtration and separation, inorganic salts, cleaner production, energy saving, environmental protection