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Glycerin is a by-product obtained during the biodiesel manufacture, through the transesterification reaction of vegetal oils. The prevision of excedent glycerine in the next few years, due to the increasing of the biodiesel production in Brazil, has been generating a discussion about new applications to this by-product. This article presents a theoretical study about the possible synthesis of a new flocculant agent, from semi-refined glycerine and p-nitrobenzoic acid to produce a quaternary ammonium salt, to be used in water treatment. The reactions which would occur during the synthesis of the flocculant agent and the necessary tests to the product validation are presented.

GLYCERINE: FROM A INCONVINIENT BIODIESEL BY-PRODUCT TO A POSSIBLE APPLICATION AS A FLOCCULANT IN WATER TREATMENT