Open AccessProduction of cis-Na2N2O2 and NaNO3 by Ball Milling Na2O and N2O in Alkali Metal Halide Salts
Author(s) -
Jack V. Davis,
Oswaldo Guio,
Burjor Captain,
Carl D. Hoff
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c02119
Subject(s) - ball mill , nitrous oxide , halide , sodium oxide , alkali metal , oxide , inorganic chemistry , sodium , calcium oxide , chemistry , propylene oxide , materials science , metallurgy , organic chemistry , polymer , ethylene oxide , copolymer
Ball milling of sodium oxides and alkali metal halide salts under a pressure of 2 atm nitrous oxide at temperatures of 38 ± 4 °C is reported. After 2.5 h of ball milling, FTIR data for both 14 N 2 O and 15 N 2 O additions show conclusively that cis -Na 2 N 2 O 2 is formed based on excellent agreement with data reported earlier by Jansen and Feldmann who prepared pure crystalline cis -Na 2 N 2 O 2 by reaction of sodium oxide and nitrous oxide for 2 h at 360 °C in a tube furnace. Continued ball milling under nitrous oxide leads to slow buildup of NaNO 3 with yields on the order of 24% achieved in 20 h. Production of nitrate only occurs during active ball milling. Studies over the first 10 h reveal a trend among potassium halide salts: KBr ≅ KCl > KI ≫ KF. Ball milling of sodium oxide alone under an atmosphere of N 2 O gives much lower yields than ball milling in the presence of added alkali metal halide salt. Ball milling of sodium oxide and nitrous oxide in fluorocarbon oil, silicone oil, calcium fluoride, clinoptilolite, molecular sieves, and silica gel does not lead to significant yields of either cis -Na 2 N 2 O 2 or NaNO 3 .