Molybdenum disulfide is the inorganic compound with the formula MoS2. This black crystalline sulfide of molybdenum occurs as the mineral molybdenite. It is the principal ore from which molybdenum metal is extracted. The natural amorphous form is known as the rarer mineral jordisite. MoS2 is less reactive than other transition metal chalcogenides, being unaffected by dilute acids. In its appearance and feel, molybdenum disulfide is similar to graphite. Indeed, like graphite, it is widely used as a solid lubricant because of its low friction properties, sometimes to relatively high temperatures.
Summary:High Pure Molybdenum Disulfide is in lead gray powder,dissolved in aqua regia,hot nitric acid and concentrated nitric acid,insoluble in water, dilute sulfuric acid and organic solvents. its chemical stability is good.
Application: producing Molybdenum compounds,solid lubricants and the additive of various kinds of lubricants.
Package:Iron drum. 50kg/drum. Inner packing is in two plastic bags,earch one is 25kg/bag.
|Friction factor|| 0.05-0.09|
Use in petrochemistry
Synthetic MoS2 is employed as a catalyst for desulfurization in petroleum refineries; e.g., hydrodesulfurization. The effectiveness of the MoS2 catalysts is enhanced by doping with small amounts of cobalt or nickel and the intimate mixture is supported on alumina. Such catalysts are generated in situ by treating molybdate/cobalt or nickel-impregnated alumina with H2S or an equivalent reagent.
There are currently no clear lubrication alternatives to molybdenum disulfide or the very similar tungsten disulfide that can resist temperatures higher than 350°C in oxidizing environments. Research has been conducted on compacted oxide layer glazes, which form during metallic surface sliding wear at several hundred degrees Celsius. However, because these oxide layers are physically-unstable, their use has currently not proven practical.
When combined with cadmium sulfide, MoS2 increases the rate of photocatalytic hydrogen production