The research and processing technologies on tara(Caesalpinia spinosa Kuntze) and tara tannin at home and abroad were reviewed,including botanic peculiarity of tara,utilization and processing of tara bean,chemical composition and its extraction,purification,processing of tara to prepare gallic acid,pyrogallic acid and their utilization,tannage for leather,as well as solid-liquid separation,foam floatation and their reorganizing,coupling technologies.The application and development of tara tannin were prospected.

The processing technologies of reconstituted tobacco were reviewed in this paper.The research progress on evolution,chemical composition,qualities increasing and detection technique,as well as reducing tar and dropping harm,felt additives,waste water disposal and other aspects of reconstituted tobacco were discussed,its future application and development have been prospected.

The principles of foam separation,diffusing separation and their coupling purification have been successfully applied to the coupling purification technology of tara tannin extract solution in industrial scale,which satisfied the requirements of production of tara tannin acid.It was showed that the concentration of tara tannin extract solution should be 2-5 °Be′ at 35-60 ℃,the flowing height of solution was 1.0-1.5 m.Fine fiber amount separated from foam floatation fine was 12.73 % of total solid in obtained tara tannin extract solution.The foam of tara extvact solution was mainly characterized by its hexagonal structure,foam layers were 3-5,foams life was 3-1 200 s,foam diameter was about 2-12 mm.