REACTION KINETICS OF MAGNESIUM COMPOUND RECOVERY FROM BITTERN USING SLAKED LIME CONTINOUSLY

Sutiyono, - and Pratiwi, - (2011) REACTION KINETICS OF MAGNESIUM COMPOUND RECOVERY FROM BITTERN USING SLAKED LIME CONTINOUSLY. In: Bali Internasional Seminar on science and technology 2011, 22-23 july 2011, Bali.

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    Abstract

    Bittern containing magnesium compounds, is quite a lot, but up till now it is just wasted. On the other hand, Indonesia needs a great deal of magnesia bricks. Therefore, this research was intended to recover magnesium from the bittern in the from of magnesium hydroxide in a baffle reactor continuously using counter current flow The process was carried out by feeding slaked lime from the top, while bittren and air from the bottom of the reactor. After 20 minutes of operation liguid samples were taken at 10 minutes intervals until steady state condition was reached. This was indicated by constant values of pH and magnesium concentration. T he process was continued for 10 – 20 minutes more to ascertain that steady state condition was really at tained. The magnesium ions in the samples was determined volumetrically. In this research, the variables studied included air flow rate, temperature, e quivalent ratio of Ca(OH) 2-MgCl2, and the initial concentration of magnesium chloride in the bittren. Based on the effects of air flow rate and temperature, the rate of Mg(OH)z formation was controlled by chemical reaction. Within the range of the variables studied, the reaction rate constant was affected by temperature exponentially, while air flow rate, Ca(OH) 2-MgCl2 equivalent ratio, and initial magnesium chlorlde concentrations showed logarithmic relations with k. The relative favourable process conditions were found to be air flow rate of 281 mL/min, temperature of 29 C o Ca(OH)2-MgCl2 equivalent ratio of 3, initial magnesium chloride concentration of 0,34mgnol/mL. Under these conditions, the conversion of MgCl2 was 89,17 %. Keywords: bittern – magnesium hydroxide – kinetics.

    Item Type: Conference or Workshop Item (Paper)
    Subjects: T Technology > TP Chemical technology > TP155 Chemical engineering
    Divisions: Conference/Seminar > Bali International Seminar on science and technology
    Depositing User: Users 8 not found.
    Date Deposited: 27 Jan 2014 15:30
    Last Modified: 27 Jan 2014 15:31
    URI: http://eprints.upnjatim.ac.id/id/eprint/4897

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