Solvent extraction is a method implemented with the purpose to recover the remaining oil in spent bleaching earth. n-hexane is the most commonly used solvent in solvent extraction due to its advantages such as able to easily extract the oil and can be separated easily with low chances to form emulsions during the extraction process. Although n-hexane is a good solvent for extraction. ... https://www.roneverhart.com/Verragio-Paradiso-Round-Diamond-Engagement-Ring-Setting-0-55-CTW-p5464/