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    • 3. 发明授权
    • Process for preparing isobutene by cleaving MTBE-containing mixtures
    • 通过裂解含MTBE的混合物制备异丁烯的方法
    • US08633345B2
    • 2014-01-21
    • US13054115
    • 2009-05-19
    • Markus WinterbergDirk RoettgerRainer BukohlHolger WiederholdWalter Luh
    • Markus WinterbergDirk RoettgerRainer BukohlHolger WiederholdWalter Luh
    • C07C4/02
    • C07C1/20C07C7/04C07C2521/12C07C2523/02C07C11/09
    • A process for preparing isobutene including cleaving a mixture obtained from an MTBE-containing feedstock and/or an MTBE-containing stream, affording a stream of reaction products consisting of isobutene, methanol, MTBE and by-products, the latter consisting of a1) high boilers having a boiling range above 55° C. at a pressure of 0.1 MPa; a2) medium boilers having a boiling range of 12 to 55° C. at a pressure of 0.1 MPa; and a3) low boilers having a boiling range below 12° C. at a pressure of 0.1 MPa; distillatively separating into a stream which contains the isobutene product and low boilers, and a stream which contains MTBE, methanol, medium boilers and high boilers; distillatively separating to obtain an MTBE-containing stream and a methanol-containing high boiler stream; recycling an MTBE-containing stream in which the medium boilers being removed completely or partially before recycling.
    • 一种制备异丁烯的方法,包括切割由含MTBE的原料和/或含MTBE的料流获得的混合物,得到由异丁烯,甲醇,MTBE和副产物组成的反应产物流,后者由a1)高 锅炉沸点范围在55℃以上,压力为0.1MPa; a2)沸点范围为12〜55℃,压力为0.1MPa的中压锅炉; 和a3)在0.1MPa的压力下沸点低于12℃的低锅炉; 蒸馏分离成含有异丁烯产物和低锅炉的料流,以及含有MTBE,甲醇,中等锅炉和高锅炉的料流; 蒸馏分离得到含MTBE的料流和含甲醇的高锅炉料流; 回收含MTBE的流,其中中等锅炉在再循环之前被完全或部分去除。