Comparação do rendimento por diferentes métodos de extração de óleo da polpa de pequi

Abstract

The oil extracted from the pequi pulp encompasses benefits in several areas, ranging from the medical field to the production of biodiesel, in addition to being rich in carotenoids. The objective of the work was to compare different methods of oil extraction from pequi pulp, and the study of the viability of a solar concentrator as an alternative. For the extraction, a Soxhlet device, an ultrasound and a twelve-sided biangular solar concentrator were used. The pequi pulp sample was previously dried and crushed in order to optimize the extraction process. The solvents used were ethanol and hexane. When the sample was left in an oven at 60ºC for 16 hours to perform its drying, a better extraction yield was obtained. The method that obtained the best yield of extracted oil was Soxhlet using hexane as the extracting solvent (59.96%). Hexane proved to be a more suitable solvent than ethanol. It was concluded in the experiment that the solar concentrator is a good alternative for the extraction process, however it has some limitations, such as the dependence on temperature and solar radiation and the large amount of solvent it uses.

Anti-Inflammatory Effect and Toxicological Profile of Pulp Residue from the Caryocar Brasiliense, a Sustainable Raw Material

“…EPPR was not included in this screening because Pegorin Brasil et al [ 10 ] analyzed the same extract and showed that it did not present significant cytotoxicity.…”

“…However, an important factor that hinders the use of pequi oil as an anti-inflammatory drug is the low yield of oil extracted from the pulp of this fruit [ 10 ]. Nevertheless, pequi pulp residue, a solid residue which results from the oil extraction process through pressing and is usually discarded, contains secondary metabolites that may have anti-inflammatory potential.…”

Avaliação dos compostos voláteis majoritários e graxos dos óleos extraídos das farinhas de melancia (Citrullus lanatus Thumb. Manf. var. Crimson Sweet Extra)

“…O novo sistema de fluído supercrítico vem sendo empregado atualmente na extração de óleos essenciais e fixos. Em ambos os óleos, o fixo possui grandes cadeias carbônicas não sendo possível a extração pelos métodos citados para óleos voláteis que possuem como característica, cadeias carbônicas menores (CUNHA et al, 2020;BRUM et al, 2009). Os estudos de compostos voláteis majoritários em óleos fixos são ainda pouco conhecidos, necessitando de estudos para que se conheçam melhor os constituintes destas classes de compostos, que muitas das vezes apenas apresentam uma análise detalhada do perfil químico de compostos de ácidos graxos.…”