METHOD OF PRODUCING HIGHLY PURE TUNGSTEN (VI) OXIDE Russian patent published in 2025 - IPC C01G41/02 B01D9/02 

Abstract RU 2839653 C1

FIELD: chemistry.

SUBSTANCE: invention can be used in the technology of materials for photonics and electronics. Disclosed is a method of producing high-purity tungsten (VI) oxide by recrystallisation, involving a step for dissolving, cleaning the solution of impurities, deposition and thermal decomposition. Tungsten oxide is dissolved in ammonia solution, then filtered from suspended particles and crystallized by evaporation method. Formed precipitate is then separated from the mother solution, dried, heated to 500 °C and annealed at temperature 500 °C for 30 minutes and at 800 °C for 2 hours. After annealing and cooling of the reactor, high-purity tungsten (VI) oxide is extracted in a glove box.

EFFECT: invention simplifies the process of purifying tungsten (VI) oxide by cutting the number of steps to obtain highly pure tungsten (VI) oxide with chemical purity of not less than 99.99 wt.%.

6 cl, 2 tbl, 2 ex

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RU 2 839 653 C1

Authors

Khomiakov Andrei Vladimirovich

Pakina Ekaterina Romanovna

Mozhevitina Elena Nikolaevna

Zykova Marina Pavlovna

Voronina Elena Nikolaevna

Avetisov Roman Igorevich

Avetisov Igor Khristoforovich

Dates

2025-05-07Published

2024-08-21Filed