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1. 发明申请

WO2011000696A3 PRODUCING ISOBUTENE BY CRACKING MTBE 审中-公开
标题翻译：通过分解MTBE，现代制造异丁烯
公开(公告)号：WO2011000696A3
公开(公告)日：2011-06-16
申请号：PCT/EP2010058424
申请日：2010-06-16
申请人： EVONIK OXENO GMBH , WINTERBERG MARKUS , ROETTGER DIRK , RIX ARMIN , BUKOHL REINER , LUH WALTER , WIEDERHOLD HOLGER , SCHILLING GUNNAR , BOEING CHRISTIAN
发明人： WINTERBERG MARKUS , ROETTGER DIRK , RIX ARMIN , BUKOHL REINER , LUH WALTER , WIEDERHOLD HOLGER , SCHILLING GUNNAR , BOEING CHRISTIAN
IPC分类号： C07C11/09 , C07C1/20 , F28D7/00
CPC分类号： C07C11/09 , C07C1/20
摘要： 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.
摘要翻译：本发明涉及一种用于通过MTBE裂解制备异丁烯的方法，其特征在于，通过以下步骤：a）MTBE合成; 包含在一个或多个含甲醇的流（VIII，IX），酸性离子交换剂，以获得流含MTBE和TBA（IV）的烃混合物，（II），用甲醇（III）含异丁烯的，B）的MTBE反应分离; 含MTBE和TBA从电流（IV）中，c）MTBE裂解流（V）的蒸馏分离; 含有至少异丁烯，甲醇，MTBE和水和任选的TBA的电流（V）的裂解在在气相中，以获得一个流（VI）的非均相催化剂，D）异丁烯去除; 的电流（VI）的蒸馏分离，得到流（VII），（VI）中的功率的每个包含多于50质量％含有甲醇，TBA和水的水平，和含异丁烯的电流（XVII）， e）水分离; 蒸馏除去水从流（VII）至低于1％的质量百分比，以获得流（VIII）中，f）返回; 在MTBE合成含甲醇的流（VIII）的完全或部分再循环。本发明的下一个主题是具有下列元素的管装置：i）所述管束，ⅱ）管板，III）挡板，静脉内）内护套，ⅳ）承压外护套，其包括至少一个入口和出口，ⅵ）的壳空间包括热发射或接收流体，其特征在于，该内壳没有间隙或具有小的间隙与所述附着在管束偏转板的长度和管板连接，其中在围绕在两侧的内包层中的壳空间中的流体。

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