Abstract:
A wide boiling range (e.g. for a given VGC) refrigeration oil, having good chemical and thermal stability and good miscibility with fluorinated hydrocarbon refrigerants, comprises a blend of from 50-75 percent of a hydrorefined naphthenic oil component and 50-25 volume percent of a wax free paraffinic component (such as a hydrogenated polyolefin oil).
Abstract:
A NOVEL LIGHT-STABLE RUBBER PROCESS OIL CONTAINING 4585 PERCENT OF AROMATIC HYDROCARBONS IS OBTAINED IN HIGH YIELD FROM A 40-10,000 SUS (AT 100*F.) NAPHTHENIC DISTILLATE BY A TWO-STEP AROMATIZATION PROCESS. IN THE FIRST STEP, WITH A SULFACTIVE CATALYST THE SULFUR AND NITROGEN IN THE OIL ARE GREATLY REDUCED AND THE AROMATIC CONTENT INCREASES. IN THE SECOND STEP, WITH NI OR NOBLE METAL CATALYST, THE AROMATIC CONTENT IS FURTHER INCREASED AND THE PRODUCT OIL HAS GOOD COLOR STABILITY WHEN AGED IN THE PRESENCE OF ULTRAVIOLET LIGHT. OILS PRODUCED BY THE PROCESS ARE ESPECIALLY USEFUL WHEN COMPOUNDED WITH NATURAL RUBBERS AND SYNTHETIC ELASTOMERIC POLYMERS (E.G., NEOPRENE, GRS) WHICH EXHIBIT IMPROVED PROCESSABILITY AND PHYSICAL PROPERTIES WHEN COMPOUNDED WITH OILS OF HIGH AROMATICITY.
Abstract:
LOW ADF, 2000-12,000 SUS (AT 100*F.) CABLE OILS ARE PREPARED FROM NAPHTHENIC LUBE FRACTIONS BY A PROCESS COMPRISING ACID-TREATING (E.G., SO3,HF,H2SO4), NEUTRALIZING AND HYDROREFINING AT 550*-750*F. AND 800-3000 P.S.I. OF HYDROGEN. PRIOR TO HYDROREFINING, THE NEUTRALIZED OIL CAN BE CONTACTED WITH AN ADSORBENT COMPRISING BAUXITE OR A NATURALLY-OCCURING FULLER''S EARTH BLEACHING CLAY, SUCH AS ATTAPULGITE, AS A PRECAUTION TO INSURE THAT THE HYDROREFINING CATALYST WILL NOT BE POISONED BY TRACE IMPURITIES. THE NAPHTHENIC LUBE FRACTION IS PREFERABLY SUBSTANTIALLY FREE FROM NAPHTHENIC ACIDS AND CAN BE A RAFFINATE FROM EXTRACTING OF A DISTILLATE WITH AN AROMATIC SELECTIVE SOLVENT (E.G. FURFURAL, PHENOL, ETC.).