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    Automatic Blending and Inspection of Lubricating Oils at the Refinery

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    A continuous lubricating oil blending facility is now in use at the Ponca City, Okla., refinery of the Continental Oil Co. The blender consists of panel systems for five components, three being for base oils and two for additives. Additive mixes are preblended to operate within the two-panel limit. Each panel component is individually metered. Ticket printers on the additive meters provide a permament record for filing. A continuous recording and controlling viscometer provides the only automatic inspection of blend properties. This viscometer utilizes a constant volume pump, constant temperature bath, fixed capillaries, and a sensitive pressure measuring device. Operation depends upon measurement of the pressure drop across a capillary as a function of viscosity under constant flow and constant temperature conditions. Numerous other specification inspections are required for lubricating oil blends, but none of these inspections have been automated to date, primarily for lack of economic justification and lack of need for continuous readings for proper quality control. A review of the possibilities of such automation is given.


    automated analyzers, analyzing, quality control, continuous blending, laboratory instrumentation, petroleum testing, lubricating oil testing, refinery instrumentation

    Author Information:

    Neilson, C. A.
    Director of Laboratories, Continental Oil Co., Ponca City, Okla.

    Committee/Subcommittee: D02.GO

    DOI: 10.1520/STP45869S