Separation of azodicarbonamide from surface of diatomite by froth flotation

Abstract

The separation of azodicarbonamide (AC) from the surface of diatomite by froth flotation is investigated in this research. Pure samples of diatomite, AC and 1:1 mixtures of the two were floated in a lab-scale flotation cell with collector dosage, frother type and dosage, and pH varied to determine the optimum experimental conditions. The diatomite sample and products from flotation tests were characterized using scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDX). The results of the flotation tests indicate that there is less AC on the surface of diatomite after flotation compared to the feed, while the AC present in diatomite pores remains unchanged. Additionally, Fourier transform infrared spectroscopy (FT-IR) was employed to study the mechanism of interaction between reagents and minerals.

Keywords

diatomite / azodicarbonamide / froth flotation

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