| 摘要 |
PURPOSE:To improve the effective rate of consumption of absorbing chemicals and the rate of absorption by depositing said chemicals in the internal spaces of porous materials without substantially closing said internal spaces. CONSTITUTION:Open-celled materials of organics such as urethane foam or inorganics such as calcined vermiculite are used, and acidic materials such as sulfamic acid, malic acid, or the like are used as absorbing chemicals in order to absorb alkaline gases and alkaline materials such as NaOH, K2CO3 or the like are used in order to absorb acidic gases. The liquid prepd. by dissolving or suspending the absorbing chemicals in water or a suitable solvent is impregnated into the open-celled materials which are then dried. The resultant open-celled materials deposited with the absorbing chemicals are packaged with films having fine holes which have gas permeability but prohibit the permeation of liquid at high density, whereby a harmful gas absorbing body is obtained. In the case of absorbing several kinds of harmful gases simultaneously, >=2 kinds of the harmful gas absorbing bodies differing in the adsorbing chemicals are combined and are contained in a perforated vessel. |
