Mineral oils: processes and products – Treatment of refining sludge
Patent
1992-06-25
1993-08-10
Brunsman, David
Mineral oils: processes and products
Treatment of refining sludge
134 27, 208390, C10G 104, C02F 1100
Patent
active
052345777
ABSTRACT:
Drill cuttings are cleaned of oil-based drilling mud and oil using a cleansing agent, such as a C6-C10 carboxylic acid, that is preferentially oil soluble at one pH and preferentially water soluble at another pH. The oily cuttings are treated with the carboxylic acid and then washed with an aqueous, alkaline washing solution, which converts the carboxylic acid to its water soluble salt and, with vigorous agitation, lifts most of the oil from the cuttings. In other embodiments, the process is used for cleaning oil-contaminated soil, sand, and gravel, and for separating the oils from the solids in oily sludges.
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Brunsman David
Frieman Shlomo R.
Union Oil Company of California
Wirzbicki Gregory F.
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