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    • 7. 发明授权
    • Process for the simultaneous manufacture of pure MTBE and a
substantially isobutene-free mixture of C.sub.4 -hydrocarbons
    • 用于同时制造纯MTBE和基本上不含异丁烯的C 4烃混合物的方法
    • US4282389A
    • 1981-08-04
    • US100058
    • 1979-12-04
    • Wilhelm DrosteFritz Obenaus
    • Wilhelm DrosteFritz Obenaus
    • C07C43/04B01J31/00C07B61/00C07C1/00C07C7/148C07C11/08C07C41/00C07C41/06C07C67/00C07C41/12
    • C07C41/06C07C7/14891
    • A process for the simultaneous manufacture of pure methyl tertiary butyl ether (MTBE) and a substantially isotubene-free mixture of C.sub.4 -hydrocarbons, by reacting the isobutene contained in the mixture of C.sub.4 -hydrocarbons with excess methanol in the liquid phase at elevated temperatures on strongly acid, macroporous, organic ion exchange resins.The process has the following steps:(a) methanol and isobutene are reacted in a molar ratio of 2:1 to 5:1 at temperatures between 30.degree. and 100.degree. C.;(b) the unconverted hydrocarbons are then removed as the top product under a pressure of 2 to 10 bars from a first rectification column;(c) the bottom product from this first column is rectified in a second column under normal pressure or under a slight excess pressure of up to 2 bars at the top of the column, the bottom product of this rectification is recycled to reaction zone (a), if necessary, after separating off a portion of the tertiary butanol formed and the C.sub.8 -olefins; and(d) the distillate from this second column is rectified in a third rectification column under a pressure of 5 to 30 bars, the distillate thus obtained is recycled into the feed to the second column and pure methyl tertiary butyl ether is withdrawn from the bottom of the third column.
    • 通过使C4-烃混合物中所含的异丁烯与过量的甲醇在液相中在高温下反应,同时制备纯甲基叔丁基醚(MTBE)和基本上不含异丁烯的C 4烃混合物的方法 强酸,大孔,有机离子交换树脂。 该方法具有以下步骤:(a)甲醇和异丁烯在30℃和100℃之间的温度下以2:1至5:1的摩尔比反应; (b)然后从第一精馏塔在2至10巴的压力下将未转化的烃作为顶部产物除去; (c)来自该第一塔的底部产物在常压或第二塔中在塔的顶部在常压或低至2巴的轻微过量压力下进行精馏,该精馏的底部产物再循环至反应区 ),如果需要,在分离一部分形成的叔丁醇和C8-烯烃之后; 和(d)来自该第二塔的馏出物在第三精馏塔中在5至30巴的压力下进行精馏,由此获得的馏出物再循环到进料到第二塔中,从底部排出纯甲基叔丁基醚 的第三列。
    • 10. 发明授权
    • Process for preparing alkyl tert-butyl ethers and di-n-butene from field
butanes
    • 从野外丁烷制备烷基叔丁基醚和二正丁烯的方法
    • US5864052A
    • 1999-01-26
    • US899792
    • 1997-07-24
    • Franz NierlichPaul OlbrichWilhelm DrosteRichard MuellerWalter Toetsch
    • Franz NierlichPaul OlbrichWilhelm DrosteRichard MuellerWalter Toetsch
    • C07C11/02C07C41/06C07C43/04
    • C07C11/02C07C41/06
    • The invention relates to a process for preparing di-n-butene and alkyl tertbutyl ethers in a coupled production from field butanes, which indicates (a) separating the field butanes 1 into n-butane and isobutane in the separation stage 4, (b) dehydrogenating the n-butane 5 in a dehydrogenation stage 6 to give an n-butene-containing dehydrogenation mixture 7, oligomerizing the n-butene in the oligomerization stage 10 to give an oligomer mixture 11 and separating di-n-butene 12 off from this, and (c) de-hydrogenating the isobutane 15 in the dehydrogenation stage 16 to give an isobutene-containing dehydrogenation mixture 17 and reacting the isobutene with an alkanol 20 in the etherification stage 19 to give an alkyl tert-butyl ether 21. In an advantageous embodiment, the field butanes 1, prior to entry into the separation stage 4, are subjected to hydrogenation conditions in the hydrogenation stage 2 and an isomerization stage 3 is assigned to the separation stage 4, by means of which isomerization stage the ratio of n-butane to isobutane is set in accordance with the desired ratio of alkyl tertbutyl ether to di-n-butene.
    • 本发明涉及一种从场丁烷偶联制备二正丁烯和烷基叔丁基醚的方法,其表明(a)在分离段4中将场丁烷1分离成正丁烷和异丁烷;(b) 在脱氢阶段6中使正丁烷5脱氢,得到含正丁烯的脱氢混合物7,使低聚反应阶段10中的正丁烯低聚,得到低聚物混合物11,并从其中分离出二 - 正丁烯12 ,和(c)脱氢阶段16中的异丁烷15脱氢,得到含异丁烯的脱氢混合物17,并使异丁烯与醚化阶段19中的链烷醇20反应,得到烷基叔丁基醚21.在 有利的实施方案中,进入分离阶段4之前的现场丁烷1在氢化阶段2中经受氢化条件,异构化阶段3分配给分离阶段4 根据所需的烷基叔丁醚与二正丁烯的比例来设定正丁烷与异丁烷的比例。