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    • 9. 发明申请
    • Method for Producing Butadiene From N-Butane
    • 从丁烷生产丁二烯的方法
    • US20070244349A1
    • 2007-10-18
    • US11718814
    • 2005-11-11
    • Sven CroneCatharina KlannerGotz-Peter SchindlerMark DudaFrieder Borgmeier
    • Sven CroneCatharina KlannerGotz-Peter SchindlerMark DudaFrieder Borgmeier
    • C07C5/333C07C11/167
    • C07C7/09C07C5/333C07C11/167
    • Processes for producing butadiene from n-butane comprising: (a) providing a feed gas stream comprising n-butane; (b) non-oxidatively dehydrogenating the feed gas stream in the presence of a catalyst in a first dehydrogenation zone to form a first intermediate gas stream comprising n-butane, 1-butene, 2-butene, butadiene and hydrogen; (c) oxidatively dehydrogenating the first intermediate gas stream in the presence of an oxygenous gas having an oxygen content of at least 75% by volume in a second dehydrogenation zone to form a second intermediate gas stream comprising n-butane, butadiene, hydrogen, carbon dioxide and steam; (d) compressing and cooling the second intermediate gas to form a first condensate stream comprising water and a third intermediate gas stream comprising n-butane, butadiene, hydrogen, carbon dioxide and steam; (e) compressing and cooling the third intermediate gas to form a second condensate stream comprising n-butane, butadiene and water and a fourth intermediate gas stream comprising n-butane, butadiene, hydrogen and carbon dioxide; (f) cooling the fourth intermediate gas stream to form a third condensate stream comprising n-butane and butadiene, and an offgas stream comprising carbon dioxide and hydrogen; (g) removing water from the second condensate stream and combining the second condensate stream and third condensate stream to form a C4 hydrocarbon stream comprising n-butane and butadiene; and (h) separating the C4 hydrocarbon stream to form a recycle stream comprising n-butane and a product stream comprising butadiene; wherein at least a portion of the recycle stream is fed to the first dehydrogenation zone.
    • 用于从正丁烷生产丁二烯的方法包括:(a)提供包含正丁烷的进料气流; (b)在催化剂存在下在第一脱氢区中使进料气流非氧化脱氢,以形成包含正丁烷,1-丁烯,2-丁烯,丁二烯和氢的第一中间气流; (c)在第二脱氢区中在氧含量至少为75体积%的氧气存在下,使第一中间气流氧化脱氢以形成包含正丁烷,丁二烯,氢,碳的第二中间气流 二氧化碳和蒸汽; (d)压缩和冷却第二中间气体以形成包含水的第一冷凝物流和包含正丁烷,丁二烯,氢气,二氧化碳和蒸汽的第三中间气流; (e)压缩和冷却第三中间气体以形成包含正丁烷,丁二烯和水的第二冷凝物流和包含正丁烷,丁二烯,氢气和二氧化碳的第四中间气流; (f)冷却第四中间气流以形成包含正丁烷和丁二烯的第三冷凝物流和包含二氧化碳和氢气的废气流; (g)从第二冷凝物流中除去水并将第二冷凝物流和第三冷凝物流合并以形成包含正丁烷和丁二烯的C 4烃流; 和(h)分离C 4 O 4烃流以形成包含正丁烷和包含丁二烯的产物流的再循环料流; 其中所述再循环流的至少一部分被供给到所述第一脱氢区。