Determining the Characteristics of Sodium Benzoate (E211) Production Using Mathematical Method

Anita Kovac Kralj

doi:10.6000/1929-5030.2012.01.01.4

Authors

Anita Kovac Kralj University of Maribor Faculty of Chemistry and Chemical engineering

DOI:

https://doi.org/10.6000/1929-5030.2012.01.01.4

Keywords:

sodium benzoate synthesis, strong electrolyte, linear extrapolation, conductivity.

Abstract

The productivity of a particular product is highly effective if we know the chemical kinetics. Determining chemical kinetics requires a fundamental knowledge of reactants' declining concentrations or the formation of product concentration. Concentration can be determined by double-linear extrapolation, using the conductivity measurement of strong electrolytes. This method is based on two linear sloped-lines from which the linear constants from different diagrams can be read:

1) The first diagram represents linear time dependence regarding difference in conductivity
2) The second diagram represents linear difference in conductivity dependence regarding concentration.

Sodium benzoate (NaC₆H₅CO₂) is a preservative. It is produced by the neutralization of benzoic acid (C₇H₆O₂) with sodium hydroxide (NaOH) in a stirred batch reactor under different room temperatures:

NaOHÂ + C₇H₆O₂ <--> NaC₆H₅CO₂+ H₂O

The kinetic parameters and characteristics of sodium benzoate production (activated energy, reaction rate constant, rate order) were determined.

Author Biography

Anita Kovac Kralj, University of Maribor Faculty of Chemistry and Chemical engineering

Chemical engineering

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