Blend comprising hydrorefined oil and unhydrorefined oil

Abstract

Abstract A HYDROCARBON OIL, USEFUL AS AN ELECTRICAL INSULATION MEDIUM, HAVING AN IMPULSE BREAKDOWN STRENGTH OF AT LEAST 150 KV., AN ASTM D-1313 TEST VALUE NO GREATER THAN 0.1 AND WHICH WILL PASS AT LEAST 50 HOURS OF THE ASTM D-943 STABILITY TEST, CAN BE PREPARED BY A PROCESS COMPRISING BLENDING 50-98 PARTS (PREFERABLY 70-95) OF A SEVERELY HYDROREFINED NAPHTHENIC OIL HAVING A VGC FROM 0.820-0.899, A VISCOSITY FROM 40 TO 200 SUS AT 100*C. AND A ULTRAVIOLET ABSORPTIVITY (UVA) OF LESS THAN 0.04 IN THE 335 MILLMICRON REGION WITH FROM 50-2 PARTS (PREFERABLY 30-5, FOR GOOD D-1313 TYPICALLY 10%) BY WEIGHT OF UNHYDROGENATED NAPHTHENIC DISTILLATE ( WHICH PREFERRABLY IS FREE FROM NAPHTHEMIC ACIDS). THE UNHYDROGENATED DISTILLATE CAN BE A RAFFINATE FROM EXTRACTION WITH AN AROMATIC SELECTIVE SOLVENT (E.G. FURFURAL, PHENOL). ANOTHER BLENDED OIL HAVING A SLUDGE-FREE DOUBLE LIFE OR UP TO 75 HOURS, CAN BE PREPARED BY THE PROCESS OF BLENDING THE UNHYDROGENATED DISTILLATE, THE HYDROGENATE DISTILLATE, AND A CYCLE OIL, IN SUCH BLENDS THE CYCLE OIL CAN BE FORM 0.1-10 WEIGHT PERCENT OF THE BLEND, THE CONCENTRATION PREFERABLY BEING SUCH THAT THE RATIO OF THE ULTRAVIOLET ABSORPTIVITY AT 335 MILLIMICRONS TO THE ABSORPTIVITY AT 330 MILLIMICRONS IN THE BLENDED PRODUCT IS NO LESS THAN 1.0. PREFERABLY, THE BLENDED OILS COMTAIN LESS THAN 25 P.P.M. OF TOTAL NITROGEN AND LESS THAN 5 P.PM. (TYPICALLY LESS THAN 1 P.P.M.) OF BASIC NITROGEN. BLENDS OF UNHYDROREFINED DISTILLATE, WITH A PARAFINIC LUBE OIL ( WHICH CAN BE HYUDROREFINED) ARE USEFUL AS TEXTILE OILS OR AS TECHNICAL WHITE OILS. SUCH BLENDS CAN ALSO CONTAIN A HYDROREFINED NAPHTHENIC OIL.

Inventors

• 👤 I Mills
• 👤 G Dimeler

Bibliographic Details