Compressed air cylinder

O presente estudo mostrou que um modelo de regressão de segunda ordem foi adequado para descrever e prever o rendimento em percentual de óleo dentro das faixas experimentais avaliadas, tendo permitido a obtenção de superfícies de respostas e definir as regiões de interesse para o processo.

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Os fatores temperatura, teor de água dos grãos, tamanho de partículas, tempo de extração e interação entre teor de água e tamanho de partículas influenciaram significativamente o rendimento em óleo extraído. O rendimento do processo aumenta com o aumento da temperatura e do tempo e com a diminuição do teor de água e tamanho médio das partículas.

As condições necessárias para a obtenção do máximo rendimento em percentual de óleo extraído foram: temperatura igual a 68,8 °C, teor de água igual a 0 %, tamanho de partículas igual ou inferior a 0,5 mm e tempo igual a 120 min. Para estas condições, o rendimento em percentual de óleo extraído foi estimado em 73,8 % em relação ao teor de óleo total dos grãos.

O processo de extração por imersão utilizando etanol como solvente se mostrou adequado para a extração de óleo de pinhão-manso, principalmente para partículas de tamanho inferior a 1 mm e com teor de água de até 2 % b.u..

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