Patent ID: 7850761

Claim:
An apparatus for highly purifying nitric oxide by removing impurities included in nitric oxide, comprising: a number of dehumidifiers connected to one another in a series, to remove water and carbon dioxide from the nitric oxide; a vaporizing and liquefying unit for respectively separating impurities into a gaseous state and a liquid state by cooling the nitric oxide which passes through the dehumidifiers at sub-zero temperatures, wherein the vaporizing and liquefying unit comprises: a separating case for separating impurities included in the nitric oxide; a temperature controlling case surrounding the outside of the separating case, the temperature controlling case for receiving a gas for automatically controlling a temperature of the separating case; and a lifting unit for moving the temperature controlling case vertically whereby movement of the temperature controlling case by the lifting unit controls pressure of the vaporizing and liquefying unit; a storage tank for storing highly purified nitric oxide separated by the vaporizing and liquefying unit; an exhaust pump for discharging gaseous impurities to a scrubber for purifying the gaseous and liquid impurities; and an outlet for discharging liquid impurities to the scrubber.