Optimization of dissolution of ulexite by pure CO2 gas in aqueous medium under pressure and production of sodium pentaborate

Authors : Veysel SELİMOĞLU, M Muhtar KOCAKERİM

Pages : 123-128

Doi:10.32571/ijct.467098

View : 41 | Download : 9

Publication Date : 2018-12-28

Article Type : Research Paper

Abstract :The obtain of the boron compounds from Ulexite which is one of the most important ores of Turkey is important. In this study, optimization of dissolution of ulexite by pure CO 2 was investigated in aqueous media under pressure in according to Taguchi method. Temperature, particle size, solid-to-liquid ratio, reaction time and pressure were chosen as parameters for the studies carried out in a high pressure-high temperature reactor. After dissolution experiments, optimum conditions for the dissolution of ulexite were found as 75 g/300 g water insert ignore into journalissuearticles values(A 1 ); for solid-to-liquid ratio, 15 bar insert ignore into journalissuearticles values(B 3 ); for CO 2 pressure, 80 ℃ insert ignore into journalissuearticles values(C1); for temperature, 60 min insert ignore into journalissuearticles values(D 3 ); for time and -150µm insert ignore into journalissuearticles values(E 1 ); for particle size. The solutions obtained under optimum conditions were dried using a spray drier. Further, after the solution was concentrated, it was crystalized by cooling, and the crystals were filtered and dried. Chemical analyzes exhibited that the products obtained in both cases are sodium pentaborate insert ignore into journalissuearticles values( Na 2 B 10 O 16); with different water contents. 
Keywords : Ulexite, carbon dioxide, sodium pentaborate, Taguchi method

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