Open AccessThe effect of nitrogen (III) oxide on direct synthesis of concentrated nitric acid
Author(s) -
O.I. Chernetsov,
O.V. Kobziev,
В. В. Казаков,
V.G. Sozontov,
Олександр Вікторович Суворін
Publication year - 2021
Publication title -
voprosy himii i himičeskoj tehnologii/voprosy himii i himičeskoj tehnologii
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.278
H-Index - 7
eISSN - 2413-7987
pISSN - 0321-4095
DOI - 10.32434/0321-4095-2021-139-6-96-101
Subject(s) - chemistry , nitric acid , nitrogen , nitric oxide , crystallization , autoclave , extraction (chemistry) , inorganic chemistry , oxide , nitrogen oxide , nuclear chemistry , organic chemistry , nox , combustion
The effect of nitrogen (III) oxide on the process of dinitrogen tetroxide separation in a dephlegmator during preparation of a "crude mixture" (HNO3–N2O4–N2O3–NO2–NO–H2O) in the production of concentrated nitric acid by direct synthesis was studied in this work. The dependence of crystallization onset on the composition of the N2O4–N2O3 mixture and temperature was determined. The refrigerant capable of maintaining the optimal temperature of the N2O4 extraction was suggested. The absence of nitrogen (III) oxide and nitrogen (I) oxide in the autoclave acid was confirmed.