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    • 9. 发明申请
    • PREPARATION OF ISOBUTENE BY DISSOCIATION OF MTBE
    • 通过MTBE的分离制备ISOBUTEN
    • US20120142985A1
    • 2012-06-07
    • US13381680
    • 2010-06-16
    • Markus WinterbergDirk RoettgerArmin RixReiner BukohlWalter LuhHolger WiederholdGunnar SchillingChristian Boeing
    • Markus WinterbergDirk RoettgerArmin RixReiner BukohlWalter LuhHolger WiederholdGunnar SchillingChristian Boeing
    • C07C1/20F28F1/00
    • 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.
    • 本发明涉及通过裂解MTBE生产异丁烯的方法,其中进行以下步骤:a)MTBE合成; 使含异丁烯的烃混合物(II)与含有一种或多种含甲醇的物流(VIII,IX)中的甲醇(III)在酸性离子交换剂上反应,得到含有MTBE和TBA的物流(Ⅳ),b)MTBE分离; 通过蒸馏从流(IV)分离含有MTBE和TBA的物流(V); c)MTBE裂解; 在气相中的异源催化剂上裂解物流(V),从而获得至少含有异丁烯,甲醇,MTBE,水和任选的TBA的流(VI),d)异丁烯分离; 通过蒸馏分离料流(VI),从而获得含有大于50质量%的流(VI)中所含的甲醇,TBA和水量的流(VII)和含有异丁烯的料流(XVII) e)水分离; 通过蒸馏从水(VII)中将水分离成低于1质量%,从而获得流(VIII),f)再循环; 将含甲醇的物流(VIII)完全或部分再循环到MT​​BE合成中。 本发明还涉及一种管束装置,其包括以下元件:i)管束,ii)管底,iii)偏转板,iv)内壳,iv)承压外壳,包括至少一个入口和出口,vi )壳体,其包括释放或吸收热量的流体,其特征在于,所述内壳连接到在所述管束的长度上连接的所述偏转板,而没有间隙或具有小间隙,并且连接到所述管底部, 其中存在于壳室中的流体在两侧封闭内壳。