| 摘要 |
Impurities are removed from organic liquids by the use of a large surfaced carrier containing reduced copper. Prior to use the carrier may be treated with hydrogen, carbon monoxide, oxygen or mixtures containing these. The organic liquids may belong to widely different classes, the following individual examples being given; normal-heptane, iso-octane, cyclohexane, cyclohexene, methylcyclohexane, benzene, toluene, chlorbenzene, carbon tetrachloride, trichloroethylene, methanol, ethanol, diethyl ether, dibutyl ether, tetrahydrofuran, dioxane, and ethyl acetate. Substances which under normal conditions are not liquid may also be purified according to the process by liquefying them under pressure in the case of gases, by bringing them in the fused state at elevated temperature into contact with supported copper, or by treating suitable solutions of them, e.g. propylene, butane, butadiene-(1,3), naphthalene and durene. Examples of impurities include oxygen, halogen, hydrogen peroxide, hydrogen sulphide, sulphur dioxide, hydrogen halides, carbon oxysulphide, iron pentacarbonyl, ammonia, acetylene, thiophene and amines. Suitable carriers are magnesium silicate and the oxides, hydroxides, carbonates and silicates of iron, manganese, cobalt and/or nickel. The addition of activators, such as compounds of the alkaline earths, zinc, cadmium, chromium, molybdenum, tungsten, vanadium, titanium, gold, and/or thorium, is recommended. The ratio by weight of copper to the other compounds of the composition may lie between 1 : 20 and 20 : 1. Specification 869,052 is referred to. |
