| 摘要 |
1,157,377. Monoethanolamine impregnated carbon. PITTSBURGH ACTIVATED CARBON CO. 17 Nov., 1967 [18 Nov., 1966], No. 52338/67. Heading C1A. Activated carbon is impregnated with monoethanolamine (M.E.A.) by passing M.E.A. vapour through the carbon. The impregnated carbon so produced is especially suitable for the removal of acid gases from inert gases as described in Specification 1,157,376, since it has a longer effective life in removing the acid gas than samples produced by impregnation with liquids. The carbon, which may vary in size from 4 to 325 mesh (U.S. Sieve) is impregnated with 1 to 50% of M.E.A. based on the weight of the M.E.A. and carbon. After use the spent carbon may be regenerated by exposure to further M.E.A. vapour, followed by blowing with inert gas to remove excess M.E.A. The apparatus shown has means for exposing- the carbon bed 4 to M.E.A. vapour from a boiler through line 10 or to the gas mixture to be treated through line 6. A condenser 26 and outlet lines 14, 28 for purified inert gas and separated acid gas respectively are also provided. M.E.A. is recycled by pump 34 from the collector 33 to the boiler 22. |
