Loading patent…
AssigneeObschestvo S Ogranichennoj Otvetstvennostju “Novye Khimicheskie Produkti”
InventorsDmitrii Stanislavovich Pashkevich, Olesya Nikolaevna Voznyuk, Ekaterina Sergeevna Kurapova, Ilya Andreevich Blinov, Pavel Sergeevich Kambur, Valentin Valerievich Kapustin
Estimating the term…
The method includes neutralizing an aqueous solution of HSA with an alkaline agent to produce ammonium fluoride and subsequently combusting it in a fire of an oxygen-containing oxidant and a hydrogen-containing fuel. It is characterized by the alkaline neutralization, which occurs in two stages. In the first stage, the aqueous hexafluorosilicic acid solution is neutralized with an alkaline agent to obtain a suspension of the correspondent hexafluorosilicate in water, after which the water is removed from the suspension. In the second stage, solid hexafluorosilicate is treated with an ammonia-containing agent to produce an aqueous solution of ammonium fluoride. Its solid products are filtered, then the aqueous ammonium fluoride solution is burned in an oxygen-containing oxidant. Hydrogen fluoride and water are condensed from the combustion products, and then the hydrogen fluoride is extracted.
A method of processing hexafluorosilicic acid (HSA) to produce hydrogen fluoride, the method comprising:
Dependencies are inferred from the claim text.