| 摘要 |
<p>898,732. Cold separation of gas mixtures. CONCH INTERNATIONAL METHANE Ltd. Feb. 28, 1961 [March 9, 1960], No. 7286/61. Class 8(2). In the separation of relatively high and low boiling components of a gas mixture e.g., carbon dioxide and methane by cooling the mixture in exchangers 12, 14 following by cooling in an expansion engine or valve 17 so as to precipitate the carbon dioxide in solid form, the latter is recovered in a cyclone separator 19 and is transported therefrom by a carrier liquid e.g., acetone through a line 26 to the heat exchanger 14 wherein the carbon dioxide is vaporized and escapes through a line 25 and the acetone is returned through a line 28 and impeller 27 to the cyclone 19 or through a by-pass 29 leading to the outlet of said cyclone. Purified methane in either the gaseous or liquid phase trainers a line 21 leading to exchanger 12 from which it is discharged as product gas through a line 23. Hydrogen sulphide may be separated from natural gas and the carrier liquid may comprise methane, butane, pentane and a variety of organic liquids having a freezing point below that of liquid carbon dioxide and hydrogen sulphide.</p> |
