Methods for removing impurities from precursors and related systems are provided. A method comprises at least one thermal cycle. The at least one thermal cycle comprises one or more of the following steps: heating a vessel comprising a precursor and at least one impurity to a temperature for a duration sufficient to vaporize at least a portion of the at least one impurity; measuring a vapor pressure within the vessel to obtain a measured vapor pressure and comparing the measured vapor pressure to a set point vapor pressure; and when the measured vapor pressure is above or within the set point vapor pressure, removing, from the vessel, at least a portion of a vapor comprising the at least one impurity. Other methods and systems are provided herein.

Provided are a method for manufacturing high-purity molybdenum oxychloride and a manufacturing apparatus thereof. Specifically, provided are a method for manufacturing molybdenum oxychloride including: a reaction process of adding molybdenum powder, chlorine gas, and oxygen to a reactor and heating to prepare molybdenum oxychloride (MoO.sub.2Cl.sub.2); a solidification and condensation process of transferring a reacted material in the reactor from the reactor to a condensation tank to solidify the reacted material on a surface of the condensation tank; a liquefaction process of heating a product solidified in the solidification and condensation process to convert the product into a liquid phase; and a purification process of filtering the product liquefied in the liquefaction process to increase purity, and a manufacturing apparatus thereof.

Provided are a method for manufacturing high-purity molybdenum oxychloride and a manufacturing apparatus thereof. Specifically, provided are a method for manufacturing molybdenum oxychloride including: a reaction process of adding molybdenum powder, chlorine gas, and oxygen to a reactor and heating to prepare molybdenum oxychloride (MoO.sub.2Cl.sub.2); a solidification and condensation process of transferring a reacted material in the reactor from the reactor to a condensation tank to solidify the reacted material on a surface of the condensation tank; a liquefaction process of heating a product solidified in the solidification and condensation process to convert the product into a liquid phase; and a purification process of filtering the product liquefied in the liquefaction process to increase purity, and a manufacturing apparatus thereof.

Provided is a process which allows uranium and molybdenum fluorides to be efficiently separated, said process comprising a step of providing a mixture containing MoF.sub.6 and UF.sub.6; a step of reducing the UF.sub.6 to UF.sub.5 in the gas phase or in a liquid phase; and a step of separating the UF.sub.5 and the MoF.sub.6 or a conversion product thereof which may be obtained by further converting the molybdenum fluoride to another molybdenum compound. In a further aspect, a process for the fluorination of metals or semimetals is provided.

Provided is a process which allows uranium and molybdenum fluorides to be efficiently separated, said process comprising a step of providing a mixture containing MoF.sub.6 and UF.sub.6; a step of reducing the UF.sub.6 to UF.sub.5 in the gas phase or in a liquid phase; and a step of separating the UF.sub.5 and the MoF.sub.6 or a conversion product thereof which may be obtained by further converting the molybdenum fluoride to another molybdenum compound. In a further aspect, a process for the fluorination of metals or semimetals is provided.

The invention relates to a method for producing MoO.sub.2Cl.sub.2 under inert conditions, comprising the steps of: (i) charging a reaction vessel with MoO.sub.2, (ii) reacting the MoO.sub.2 with supplied Cl.sub.2 in the reaction vessel at a first temperature T.sub.1 to give gaseous MoO.sub.2Cl.sub.2, (iii) transferring the gaseous MoO.sub.2Cl.sub.2 into a receiving vessel, (iv) resublimating the gaseous MoO.sub.2Cl.sub.2 in the receiving vessel to give solid MoO.sub.2Cl.sub.2 at a second temperature T.sub.2 that is lower than T.sub.1, and (v) recovering solid MoO.sub.2Cl.sub.2 with a purity determined by ICP-OES/MS of 99.9996 wt. % or more. The invention also relates to high-purity MoO.sub.2Cl.sub.2, the use thereof, and electronic components.

Methods for synthesizing and/or purifying molybdenum compounds are provided. A method comprises obtaining a reagent; obtaining a metal trioxide compound; and contacting the reagent and the metal trioxide compound sufficient to form a reaction product comprising a molybdenum compound. Related compositions, related systems, and other related methods are provided, among other things.

Methods for synthesizing and/or purifying molybdenum compounds are provided. A method comprises obtaining a reagent; obtaining a metal trioxide compound; and contacting the reagent and the metal trioxide compound sufficient to form a reaction product comprising a molybdenum compound. Related compositions, related systems, and other related methods are provided, among other things.