Published: Jan 2011
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Sulfur either in elemental form or as its organic and inorganic compounds is present in most petroleum products and lubricants in varying concentrations, from high levels in some crude oils and lubricant additives to trace amounts in certain processed petroleum products. Sulfur originates in crude oil from natural sources from its marine animal and vegetative origins deposited with sediment in coastal waters in prehistoric times. Over the millennia, sulfur, oxygen, nitrogen, and other volatile compounds evolved out of this primordial mixture due to the bacterial actions and thermal and environmental pressure leaving behind a mixture of hydrocarbons containing some of these elements, metals, and other compounds. In additives and lubricating oils, sulfur compounds are added as metal compounds acting as performance improvers .
Nadkarni, R. A. Kishore
Millennium Analytics, Inc., East Brunswick, NJ