Suntech, Inc.

Sun Oil Company of Pennsylvania

Sun Petroleum Products Company

Ronald W Reynolds

John D Tice

John S Nutter

A process for making naphthenic type lubricating oils from a low VI waxy crude which comprises distilling said low VI waxy crude to 500.degree. to 650.degree. F at atmospheric pressure to separate distillable fractions therefrom, subjecting the residue to a vacuum distillation at about 25 to about 125 mm Hg absolute pressure to obtain one or more gas oil fractions, optionally hydrotreating said gas oil fractions in the presence of a Ni/Mo catalyst at 550.degree. to 650.degree. F, 0.25 to 1.0 LHSV, and 700-1500 psig, and catalytically dewaxing said distillates in the presence of a H.sup.+ form mordenite catalyst containing a Group VI or Group VIII metal at 550.degree. to 750.degree. F, 500 to 1500 psig and 0.25 to 5.0 LHSV, to obtain said naphthenic type oils having pour points to from about -60.degree. to +20.degree. F.

Manufacture of naphthenic type lubricating oils

A process for making refrigeration oils without acid treating and clay contacting steps which comprises subjecting a naphthenic oil to a first hydrogenation step at a temperature of from about 550.degree. to about 660.degree. F, a hydrogen pressure of from about 500 to about 1500 psig., and in the presence of a nickel-molybdenum or cobalt-molybdenum catalyst, subjecting the hydrogenated oil to a second hydrogenation treatment under the same conditions, catalytically dewaxing the twice hydrogenated oil and percolating the dewaxed oil through bauxite.

Process for manufacturing refrigeration oils

In the process of manufacturing a refrigeration oil where an oil stock is dewaxed by forming a complex with urea in the presence of an activator, the improvement of adding hot vacuum gas oil to the separated urea complex whereby the activator is flashed off and is recycled for reuse and the slurry of the urea complex in the gas oil is treated with hot water to break the adduct and separate a water-urea mixture and oil and paraffin. The improved method enables accurate and uniform temperature control and degradation of urea is suppressed.

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Wilmington, DE, United States of America

Ronald W Reynolds