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    • 5. 发明公开
    • HERSTELLUNG VON ISOBUTEN DURCH SPALTUNG VON MTBE
    • 通过分解MTBE,现代制造异丁烯
    • EP2448893A2
    • 2012-05-09
    • EP10725455.9
    • 2010-06-16
    • Evonik Oxeno GmbH
    • WINTERBERG, MarkusRÖTTGER, DirkRIX, ArminBUKOHL, ReinerLUH, WalterWIEDERHOLD, HolgerSCHILLING, GunnarBÖING, Christian
    • C07C11/09
    • C07C11/09C07C1/20
    • The invention relates to a method for producing isobutene by cracking MTBE, wherein the following steps are carried out: a) MTBE synthesis; reacting isobutene-containing hydrocarbon mixtures (II) with methanol (III), contained in one or more methanol-containing streams (VIII, IX), on acidic ion exchangers obtaining a stream (IV) containing MTBE and TBA, b) MTBE separation; separating a stream (V) containing MTBE and TBA from stream (IV) by means of distillation, c) MTBE cracking; cracking the stream (V) on a heterogenic catalyst in the gas phase, thus obtaining a stream (VI) which contains at least isobutene, methanol, MTBE, water, and optionally TBA, d) isobutene separation; separating the stream (VI) by means of distillation, thus obtaining a stream (VII) containing more than 50 mass % of the amounts of methanol, TBA, and water contained in stream (VI), and a stream (XVII) containing isobutene, e) water separation; separating, water from the stream (VII) to below 1 mass % by means of distillation, thus obtaining a stream (VIII), f) recirculating; complete or partial recirculation of the methanol-containing stream (VIII) into the MTBE synthesis. The invention further relates to a tube bundle device comprising the following elements: i) tube bundle, ii) tube bottom, iii) deflection plates, iv) inner shell, iv) pressure bearing outer shell, comprising at least one inlet and outlet, vi) shell chamber, comprising a fluid releasing or absorbing heat, characterized in that the inner shell is connected to the deflection plates attached over the length of the tube bundle without a gap, or with a small gap, and is connected to the tube bottom, wherein the fluid present in the shell chamber encloses the inner shell on both sides.
    • 6. 发明公开
    • AUFBEREITUNG EINES 3-METHYL-1-BUTEN-HALTIGEN GEMISCHES
    • AUFBERETEUNG EINES 3-METHYL-1-BUTEN-HALTIGEN GEMISCHES
    • EP2435389A1
    • 2012-04-04
    • EP10717632.3
    • 2010-04-29
    • Evonik Oxeno GmbH
    • WINTERBERG, MarkusKAIZIK, AlfredRIX, ArminGRASS, MichaelBÜSCHKEN, WilfriedBECKER, Marc
    • C07C1/24C07C7/04C07C11/10
    • C07C7/04C07C1/24C07C7/06C07C11/10
    • The invention relates to a method for preparing a mixture containing water, 3-methyl-1-butene, and at least one other methyl butene. Said method involves the provision of the mixture; the primary distillation of the mixture in order to produce a gaseous primary head product containing methyl butene and water, and a water-free primary sump product containing 3-methyl-1-butene; the condensation of the gaseous primary head product such that a condensate comprising a liquid aqueous phase and a liquid organic phase is produced; the separation of the condensate into a liquid, aqueous phase and a liquid organic phase; the ejection of the liquid aqueous phase; the reintroduction of the organic phase into the primary distillation process; and finally the secondary distillation of the water-free primary sump product of the primary distillation, such that a secondary head product consisting of 3-methyl-1-butene and a secondary sump product is produced. The secondary head product produced has a purity that enables it to be used directly as a monomer or comonomer for producing polymers or copolymers.
    • 本发明是一种处理含有水,3-甲基-1-丁烷和至少一种其它甲基丁烯的混合物的方法。 该方法包括对该混合物进行一次蒸馏,得到含有甲基丁烯和水的气态主要塔顶产物和含有3-甲基-1-丁烯的无水初级底物产物; 气态一级塔顶产物的冷凝,以产生包含液态水相和液体有机相的冷凝物; 将冷凝液分离成液态水相和液体有机相; 液体水相的排出; 将有机相再循环至初级蒸馏; 最后从一次蒸馏中二次蒸馏无水初级底部产物,得到包含3-甲基-1-丁烯和二级底部产物的二级塔顶产物。 获得的二次塔顶产物具有使其能够直接用作制备聚合物或共聚物的单体或共聚单体的纯度。