Abstract
Kinetics of catalytic esterification of glycerol with butanoic acid on model systems was studied. Reaction orders for the reactants (butanoic acid and glycerol) were determined. They are close to 1.It was shown that the reaction order with respect to the catalyst - orthophosphoric acid - in regions where its concentration is above 0.1 mol/l is equal to zero. The estimated value of activation energy is 51.9± 8.0 kJ/mol. The results of the experiment can be used to create an industrial technological process for the synthesis of glycerol tributyrate. This compound can be used as an alternative non-phthalate plasticizer for articles made of PVC. The obtained kinetic model was validated on glycerol-containing waste of the biodiesel synthesis from renewable raw materials. The recycling of the by-product in the biofuel production with obtaining plasticizing compositions for the polymer industry can be developed on the basis of the studies.
Highlights
Kinetics of catalytic esterification of glycerol with butanoic acid on model systems was studied
It was shown that the reaction order with respect to the catalyst – orthophosphoric acid – in regions where its concentration is above 0.1 mol/l is equal to zero
The obtained kinetic model was validated on glycerol-containing waste of the biodiesel synthesis from renewable raw materials
Summary
В работе на модельных системах исследована кинетика каталитической этерификации глицерина бутановой кислотой. Полученная кинетическая модель проверена на глицеринсодержащих отходах процесса синтеза биодизеля из возобновляемого сырья, что позволяет предложить способ утилизации побочных продуктов при производстве биотоплива с получением технически востребованного продукта для полимерной промышленности с высокой добавленной стоимостью. Reaction orders for the reactants (butanoic acid and glycerol) were determined. Технологически простым и востребованным способом утилизации глицериновой фракции может стать производство на ее основе сложных эфиров глицерина и карбоновых кислот, которые найдут применение в качестве пластификаторов для ПВХ-композиций [6]. Цель данной работы – изучение закономерностей реакции этерификации глицеринсодержащих продуктов бутановой кислотой до триглицеридов для разработки технологии производства пластификатора на основе отходов производства биодизеля
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