METHOD OF PREPARING NITROUS OXIDE Russian patent published in 2001 - IPC

FIELD: nitrous oxide used for industrial and medical purposes. SUBSTANCE: in order to prepare nitrous oxide from ammonium nitrate, reaction mixture containing nitrous oxide and uncondeconsable impurities is washed, prior to being purified and filled into high-pressure bottles, with solution of nitric acid or ammonium nitrate or mixture thereof at temperatures from 5 to 35 C, pressures from 20 to 200 mm water column, gas to absorbent ratio of 3-6: 1. In order to prepare nitrous oxide which meets requirements of pharmocopeia article, low- temperature over-evaporation of decomposition products is carried out. EFFECT: reduced losses of nitrous oxide in preparing nitrous oxide of high purity and greater process reliability. 2 cl, 1 dwg, 1 ex