公开(公告)号：US06333442B1

公开(公告)日：2001-12-25

申请号：US09256185

申请日：1999-02-24

申请人： Jean Cosyns ,  Blaise Didillon ,  Lionel Quicke

发明人： Jean Cosyns ,  Blaise Didillon ,  Lionel Quicke

IPC分类号： C07C258

CPC分类号： C10G70/00 ,  C07C5/13 ,  C07C7/04 ,  C07C9/12 ,  C07C9/21 ,  C07C2523/42 ,  C07C2523/44 ,  C07C2523/755 ,  C07C2527/054 ,  C07C2527/1206 ,  C07C11/08

摘要： An aliphatic alkylate with a high octane number is prepared from a C4 catalytic cracking or steam-cracking fraction that contains mainly isobutane, isobutene, butene-1 and butenes-2 by: (a) hydro-isomerizing said C4 fraction, obtaining a mixture that contains for the most part butenes-2, isobutene and isobutane; (b) separating, by distillation of the hydro-isomerized fraction, of a butene-2-rich effluent that is collected at the bottom and an isobutane- and isobutene-rich effluent that is collected at the top; (c) sending said isobutene- and isobutane-rich effluent into a hydrogenation zone that produces an effluent that for the most part contains isobutane; (d) sending of said butenes-2-rich effluent that is derived from (b) and of said effluent that for the most part contains the isobutane that is derived from (c) into an alkylation zone producing, by addition of isobutane to butenes-2, an isooctane mixture that contains excess isobutane; (e) separating by distillation of excess isobutane, which comes out at the top, and alkylate with an improved octane number, which comes out at the bottom; and (f) recycling of the excess isobutane that is recovered in (e) upstream from hydrogenation (c) of the top effluent from the distillation of (b).

摘要翻译： 具有高辛烷值的脂肪族烷基化物由主要包含异丁烷，异丁烯，丁烯-1和丁烯-2的C4催化裂化或蒸汽裂解馏分制备，通过以下步骤：（a）将所述C4馏分加氢异构化，得到 含有大部分丁烯-2，异丁烯和异丁烷;（b）通过蒸馏加氢异构化馏分，分离富含2-丁烯的流出物，其在底部收集，富含异丁烷和异丁烯的流出物 其收集在顶部;（c）将所述异丁烯和异丁烷富集的流出物送入氢化区，其产生大部分含有异丁烷的流出物;（d）送出所衍生的所述富含2-丁烯的流出物 （b）和所述流出物，其大部分含有从（c）衍生的异丁烷进入烷基化区，通过向丁烯-2中加入异丁烷，产生含有过量异丁烷的异辛烷混合物;（e）分离 通过蒸馏过量的异丁烷 ，其出现在顶部，烷基化物具有改善的辛烷值，其出现在底部; 和（f）在（e）从（b）的蒸馏的顶部流出物的氢化（c）上游回收的过量异丁烷的再循环。