Dissolution of Ulexite in Hydrochloric Acid Solutions

Year 2016, Volume: 1 Issue: 1, 1 - 12, 31.12.2016

Yaşar Genel Fahriye İnce Halil Durak

Abstract

Ulexite is an important boron mineral used for the
production of boron compounds. Purpose of the study has been to investigate the
dissolution of ulexite in hydrochloric acid solutions in a batch reactor and to
present an alternative process to produce boric acid. Reaction temperature,
particle size, solid/liquid ratio, acid concentration and stirring speed have
been selected as parameters on the dissolution rate of ulexite. The parameters
used in experiments are; acid concentration 0.75^*,1,1.25,1.5,2M,
reaction temperature 30^*,40,50,60,70^oC, particle size
-14+18^*,-18+30,-30+40,-40+50,-50+60 mesh, solid/liquid ratio
5/100,7.5/100,10/100^* g/mL, stirring speed 500^*,650,800
rpm. It has been found that the dissolution rate has increased the reaction
temperature and the stirring speed. However, increasing the particle size, acid
concentration and solid/liquid ratio have decreased the rate of dissolution.

Keywords

Ulexite, Hydrochloric acid

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