Ethylene-derived chemical products are produced from gaseous paraffinic hydrocarbons by the steps of:
(I) feeding a gaseous paraffinic hydrocarbon, hydrogen and an oxygen-containing gas having a ratio of hydrocarbon to oxygen greater than the stoichiometric ratio for complete combustion to a partial oxidation zone maintained under conditions whereby partial oxidation and simultaneous cracking of the hydrocarbon occurs to form a product comprising acetylene, ethylene, carbon monoxide and hydrogen and recovering the product therefrom,
(II) cooling the product from step (I) to a temperature below 500°C,
(III) contacting under selective hydrogenation conditions the cooled product recovered from step (II) with a catalyst active in the presence of ethylene and carbon monoxide for the selective hydrogenation of acetylene to ethylene to form a product comprising ethylene, carbon monoxide and hydrogen, and
(IV) either (i) separating the product from step (III) into ethylene, carbon monoxide and hydrogen, recovering the carbon monoxide and hydrogen and reacting the ethylene so-separated to form ethylene-derived products, or (ii) reacting ethylene, carbon monoxide, and hydrogen obtained in step (III) without separation to produce ethylene-derived products, or (iii) separating and recovering hydrogen from the product of step (III) and reacting the ethylene and carbon monoxide without further separation to produce ethylene-derived products.
乙烯衍生
化学产品是由气态石蜡烃通过以下步骤生产出来的:
(I) 将气态石蜡碳氢化合物、
氢气和含
氧气体(碳氢化合物与
氧气之比大于完全燃烧的
化学计量比)送入部分氧化区,在此条件下,碳氢化合物发生部分氧化并同时裂解,形成由
乙炔、
乙烯、
一氧化碳和
氢气组成的产品,并从中回收产品、
(II) 将来自步骤(I)的产物冷却至低于 500°C 的温度、
(III) 在选择性氢化条件下,将步骤(II)中回收的冷却产物与在
乙烯和
一氧化碳存在下具有活性的催化剂接触,使
乙炔选择性氢化成
乙烯,形成由
乙烯、
一氧化碳和氢组成的产物,以及
(IV) (i)将步骤(III)的产物分离成
乙烯、
一氧化碳和
氢气,回收
一氧化碳和
氢气,并使分离出的
乙烯反应生成
乙烯衍生产品,或(ii)使步骤(III)中得到的
乙烯、
一氧化碳和
氢气反应而不分离,生成
乙烯衍生产品,或(iii)从步骤(III)的产物中分离并回收
氢气,使
乙烯和
一氧化碳反应而不进一步分离,生成
乙烯衍生产品。