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Tuesday, 24 September 2019
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Raw materials & technologies, Raw materials, Coatings binders

Thermal processing of soybean oil to obtain bio-based polymers and oil

Wednesday, 21 January 2015

In a study Brasilian researchers evaluated the use of triacylglycerides to produce bio-based resins and bio-oils suitable to be used as a binder in printing inks (offset) and as diesel-like fuel.

Brasilian researchers evaluated the use of triacylglycerides to produce bio-based resins to be used as a binder in printing inks (offset). Source: Fotolia
Brasilian researchers evaluated the use of triacylglycerides to produce bio-based resins to be used as a binder in printing inks (offset). Source:...

They kept soybean oil under nitrogen atmosphere at temperatures ranging from 260°C to 370°C up to 12h in the presence or absence of a nickel complex as a catalyst precursor.

Presence of a nickel complex increased viscosity

It was observed that the reaction occurs in two steps. In the first one, occurs the consumption of the double bonds via Diels-Alder to form a polymer increasing the viscosity of the material. In a second step, the pyrolysis of ester groups and the alkyd chains takes place, reducing a viscosity of the polymers. Besides, using Nickel complex as a catalyst precursor it was observed a high activity to produce polymers with higher viscosity in a shorter time than when comparing with reactions without catalyst. It were also analysed the bio-oil formed during the reaction. It was observed that without catalyst the pyrolysis leads to the formation of high amounts of carboxylic acids with short chain. However, the presence of Nickel complex increased the formation of hydrocarbons and reduced the amount of formed carboxylic acids, strongly indicating its activity in the deoxygenation.

The study is published in: Industrial Crops and Products, Volume 66, April 2015, Pages 255-261.

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