Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Patent
1992-06-25
1993-05-25
Morris, Theodore
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
134 28, 134 40, 134 10, 175 66, 175 46, 175206, 252 8551, 210925, 210768, B08B 308, B08B 700, C23G 500
Patent
active
052136256
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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"Efficiency of a Single-Stage Cuttings Washer With a Mineral Oil Invert Emulsion and Its Environmental Significance" by Maurice Jones et al., Society of Petroleum Engineers of AIME, SPE 12121, Copyright 1983.
El-Arini Zeinab
Frieman Shlomo R.
Morris Theodore
Union Oil Company of California
Wirzbicki Gregory F.
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