Molybdenum disulfide oil, better known as Moly or Moly Oil is a lubricant used to reduce friction between two surfaces in contact without the need for an oil medium. It is a naturally occurring material, found in the mineral molybdenite and is extracted as a black crystalline sulfide. It is a very durable solid material that is essentially inert, unaffected by dilute acids and oxygen. It has the feel and appearance of graphite, and is extremely tenacious when it adheres to metal surfaces.

Applicants unique preparation process eliminates the need for expensive retorting and retort controlling equipment. In this process, wet, oily molybdenum disulfide powder derived directly from the oil flotation extraction process of powdered molybdenite concentrate is charged into a fluid energy impact pulverization mill and pulverized while entrained in a stream of gaseous material such as air, compressed nitrogen or superheated steam. This results in a substantially dry, exceedingly fine molybdenum disulfide material containing a controlled amount of residuary oil.

The residuary oil acts as a protective coating on the molybdenum disulfide particles and prevents them from oxidizing during the pulverization process. The residuary oil also helps to retain the comminuted particles in suspension as they are pulverized resulting in a relatively homogeneous, free-flowing powder. This material can then be used as a dry lubricant or added to greases, oils and the like where it will attract the metal parts to which it is applied, acting as an anti-wear surface coating.