| 摘要 |
A purification process of crude oil soluble hydrocarbon sulfonic acid mixtures which comprises washing the crude oil soluble hydrocarbon sulfonic acid with water, contacting the washed, partially pure oil soluble hydrocarbon sulfonic acid with an excess of calcium carbonate to neutralize entrained sulfuric acid and adsorb impurities, removing the resulting calcium sulfate along with the remaining calcium carbonate, and recovering the pure sulfonic acid. Sulfonic acid produced in this manner is substantially free of impurities. The sulfonic acid is ideal for overbasing to high Total Base Number (TBN) sulfonate.
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