Studies on Acid Sludge - Part V: Hydrocarbon/ Water Solubilizing Characteristics of Sulphonates
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Abstract
The hydrocarbon/water micro-emulsions prepared from sodium petroleum sulphonates obtained from various acid
sludges have been evaluated as additives for solubilized metal working and fire resistant hydraulic fluids. The type
and the quantities of hydrocarbon solubilized per gram of the sulphonates depend upon the structure of the hydrocarbon
portion of the sulphonate and the proportion of disulphonates. Sulphonates with a higher proportion of carbon in
paraffinic side chains solubilise larger quantities of hydrocarbons. The solubilisation of hydrocarbon decreases with increasing
content of disulphonates and increases in the presence of long chain alcohols. The tolerance towards the presence
of electrolytes, especially bivalent cations, how,ever, increases due to the presence of disulphonates. These sulphonates
are particularly useful in preparing hydrocarbon micro-emulsions in water containing relatively large proportion
of electrolytes particularly the bivalent cations