| 摘要 |
The invention has regard to a method of adding a malodorant to a consumer gas, such as oxygen, natural gas, propane gas, town gas or some other combustible gas, an odorless, toxic gas or a more or less inert gas distributed to a consumer station for the purpose of warning individuals in the surroundings that there is a risk of fire, explosion, suffocation, toxicity or some other risk due to the presence of consumer gas in the surrounding atmosphere as a result of leakage, negligence or some other reason, said method including the step of mixing a master gas, i.e. a carrier gas diluted with malodorant, with the consumer gas. The characteristic feature of the method comprises dissolving the malodorant in the form of an organic sulphur compound or a mixture of two or more organic sulphur compounds, these compounds comprising tetrahydrothiophene, methyl mercaptan, ethyl mercaptan, propyl mercaptan and butyl mercaptan, dimethyl sulphide, diethyl sulphide and methylethyl sulphide, in condensed carbon dioxide, sulphur hexafluoride or dinitrogen oxide in a pressure vessel, thereby obtaining in the pressure vessel a liquid phase, consisting of a solution of malodorant in the condensed gas, and a gas phase; and removing the liquid phase from the vessel, vaporizing said liquid phase and supplying the resultant vapor phase to the consumer gas, which is distributed to the consumer. The invention also relates to a gas mixture consisting of the malodorant in condensed carbon dioxide, sulphur hexafluoride or nitrous oxide. |
