Sheer efficiency of agitation induced by a mechanical impeller depends on factors that may not seem important at first glance, those being form of the mixing tank in which liquids are agitated, impeller geometry and its position in agitated vessel. In this work, the effect of 45° pitched-blade impeller off- bottom clearance on the state of suspension of NaX zeolite and power consumption is being investigated. All experiments were carried out in a 2.14 dm 3 glass reactor equiped with four baffles. The liquid height was equal to the tank diameter (H = d t ), impeller to tank diameter ratio (D a /d t ) was 0.46 and impeller off- bottom clearances given by ratios (c/H) were in the range from 0.1 to 0.5. Besides impeller position, influence of zeolite mass concentration on the state of complete suspension was analysed as well. Variables examined in this research were minimum impeller speed required to achieve the state of complete suspension, N JS, and torque, , at different impeller position and zeolite mass concentration. Furthermore, from determined values of N JS and τ, power consumptions for applied conditions were calculated. The reason for all these conditions being defined is to assemble an optimal configuration of an agitation process vessel for zeolite suspension. In this work, simulation of fluid flow pattern at different impeller off-bottom clearences by program VisiMix 2000 Turbulent were made as well. According to experimental results, it was confirmed that minimum agitation speed and torque required for achieving the state of complete suspension increases with an increment of impeller distance from the bottom of the tank, as it is the case with the bigger mass concentration, although this effect is not as pronounced as the impeller off-bottom clearance is. Power consumption increased with impeller off-bottom clearance. The highest amount of power is measured when the stirrer was positioned at the half of the liquid height, mass concentration of suspension then being 4.91 g/dm 3 . However, apart from complete suspension, one more thing to consider when making optimal configuration of agitation vessel is concentration of exchanged Na + ions on used zeolite, which was not examined in this thesis.