| 摘要 |
336,633. Elkington, H. D., (Naamlooze Vennootschap de Bataafsche Petroleum Maatschappij). June 4, 1929. Divided on 336,603. Sulphates, ethereal; alcohols; ethers. - Ethylene is absorbed in sulphuric acid containing, as catalysts, one or more of the metals platinum, palladium, osmium, iridium, ruthenium, or rhodium, or compounds thereof, in finely divided form and preferably deposited on a carrier such as carbon black, silica gel, or decolorizing clay, tor example, by being colloidally precipitated thereon. The reaction may be carried out at ordinary, reduced, or increased pressures or temperatures. Solvents such as ethyl alcohol, acetic acid, nitrobenzene, or ether may be added to the sulphuric acid, and substances known to accelerate the absorbtion such as froth-forming substances or emulsifying agents may also be present. The ethylene may be dissolved in suitable solvents before being brought into contact with the acid. The method may be applied to crude gases containing ethylene, for example, natural gas or cracking gases. The liquid containing the absorbed ethylene may be hydrolyzed, distilled, or otherwise treated in known manner for the production of such compounds as esters, alcohols, or ethers therefrom. According to examples, (1) ethylene is absorbed in 96 per cent sulphuric in presence of metallic platinum deposited on carbon black from a solution of platinic chloride by means of formaldehyde and alkali, (2) ethylene is absorbed at 100‹ C. in 96 per cent sulphuric acid in which rhodium black (consisting of metallic rhodium and rhodium suboxide) is suspended. Specifications 323,748 and 336,603 are referred to.
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