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US 12,735,329 B2Granted
Method for production of molybdenum dioxide dichloride
AssigneesWonik Materials, Wonik Materials North America, LLC
InventorsSeong Ho Han, Andrey Korolev, Venkata Ramana Gandikota
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Abstract
The present invention relates to a method for producing molybdenum dioxide dichloride, which is a very efficient method that does not use dangerous chlorine gas and high reaction temperature and is capable of obtaining molybdenum dioxide dichloride without solvent at a high yield.
Claims7
A method for producing molybdenum dioxide dichloride (MoO2Cl2), comprising:
- i) a step of producing a mixture by mixing anhydrous molybdenum trioxide and thionyl chloride in a non-coordinating solvent under an inert gas (a first step of producing a mixture);
- ii) a step of producing a solid product precipitated by refluxing and stirring the produced mixture with a temperature raised under an inert gas (a second step of producing a solid product);
- and
- iii) a step of separating and purifying molybdenum dioxide dichloride (MoO2Cl2) from the produced solid product (a third step of separating and purifying molybdenum dioxide dichloride (MoO2Cl2)),
- wherein the non-coordinating solvent is an aliphatic or aromatic solvent having 2 or more carbon atoms and containing a halogen element, the non-coordinating solvent having a boiling point of 50° C. to 200° C., and
- wherein in the first step of producing a mixture, a usage ratio (in moles) of molybdenum trioxide to thionyl chloride is 1:0.8 to 1:1.5.
3 more elements
Dependencies are inferred from the claim text.