Detersive Performance of n-Undecane as Drycleaning Solvent and Application of Enzyme to Drycleaning System.

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Soil removal n-undecane as drycleaning solvent was investigated in comparison with those of other commercially available petroleum solvents. The effects of the water solubilized in the solvents by surfactant on soil removal were also discussed by using sodium chloride as water soluble soil and mixture of carbon black and triolene as pigment soil.Maximum amount of the water solubilized in the solvents by the surfactant (Aerosol OT) increases in the order of Stoddard solvent< hydrogenated Stoddard solvent - n-undecane< n-decane. The removal rate of sodium chloride increases as the amount of the solubilized water increases. The removal rate of carbon black mixed with triolene decreases as the amount of the solubilized water increases. However, in case that the molar ratio of the water to the surfactant is low and constant, the removal rate is kept constant at the certain level. The characteristic properties of water solubilized by Aerosol OT reverse micelles was investigated by using FT-IR spectroscopy. The broad peaks obtained for water OH was resolved by Gaussian curve fitting. Three types of water was observed.