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US 4,599,117 AGranted
Process for the decontamination of oil-contaminated particulate solids
OwnerS. Roy Luxemburginventor
Life of this patent
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Abstract
A process for cleaning oil-contaminated particulate solids, or drill cuttings such as obtained from a well bore. Oil-contaminated particulate solids are admixed with an aqueous polymeric solution, and preferably also a filter aid, and oil-decontaminated solids are separated therefrom. The oil-contaminated solids are rendered environmentally acceptable for discharge, and the oil can be recovered.
Claims7
A process for cleaning oil-contaminated particulate solids, which comprises
- adding said oil-contaminated solids to the first compartment of a water filled compartmented vessel, the compartments of which are separated by a baffle, with the first compartment containing one or more screws capable of pulverizing said particulate solids, and the water of one compartment admixing with water in the other,
- adding to a compartment of the vessel, an effective amount of a water soluble polymer selected from the group consisting of polyacrylamides, poly(acrylic acid), poly (ethylene oxide) resins, polyvinyl alochol, carboxymethylcellulose, carrageenan gums, and guar gums, to separate the oil from said solids and deumulsify said oil,
- pulverizing and reducing in size the solids added to said first compartment with said screws,
- passing said solids under said baffle and separating oil as an oil-in-water emulsion from said solids,
- separating oil-free solids from the second compartment of the vessel of water, and
- passing said oil and water emulsion from said compartmented vessel and demulsifying same for recovery of the oil as a separate phase.
3 more elements
Dependencies are inferred from the claim text.