Liquid carbon dioxide cleaning utilizing natural and modified natural solvents

摘要

An article having soil in contact therewith is cleaned by treating at least a portion of the article with a bio-diesel compound, and agitating the article in contact with dense-phase carbon dioxide to dislodge the soil from the article. The bio-diesel compound may be used in a pre-treatment step, during the agitation step, or both. The bio-diesel compound may be mixed with water and/or a cleaning enzyme.