Patent ID: 9677028
Date: 2017-06-13
CPC Classifications: A23D,A23L,A61K,A61Q,C11B

Claim:
1. A method of refining a crude oil derived from a seed of a plant of the Nicotiana species, comprising: a) treating the crude oil derived from a seed of a plant of the b) neutralizing the acid-treated oil with a basic aqueous solution to give a neutralized mixture and separating a precipitate from the neutralized mixture to give a neutralized oil; and c) bleaching the neutralized oil, deodorizing the neutralized oil, or both bleaching and deodorizing the neutralized oil, wherein the bleaching comprises contacting the neutralized oil with at least two bleaching clays, wherein the at least two bleaching clays have different pH values, to provide a refined tobacco seed oil comprising less than 5% free fatty acids by weight, wherein the method results in at least 10% less loss than traditional methods of refining crude oils.