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    • 3. 发明授权
    • Process and apparatus for preparing tertiary alkyl ether
    • 叔烷基醚的制备方法和装置
    • US5637777A
    • 1997-06-10
    • US302837
    • 1994-09-16
    • Juhani AittamaaIsto EilosJuha JakkulaPetri Lindqvist
    • Juhani AittamaaIsto EilosJuha JakkulaPetri Lindqvist
    • B01J31/10B01D3/00C07B61/00C07C41/06C07C41/42C07C43/04C07C43/00
    • C07C41/42B01D3/009C07C41/06Y02P20/127Y10S203/06Y10S203/17Y10S203/20
    • The invention concerns a process and an apparatus for preparing tertiary ethers. According to the process, C.sub.4 to C.sub.6 isoolefins and possibly heavier olefins contained in the feedstock are reacted with lower aliphatic alcohols, in particular methanol or ethanol, in a catalytic distillation reactor system in order to produce the corresponding ethers. According to the invention, the reaction between the isoolefins and the alcohols is essentially carried out in at least one reactor (5-7) of the kind, which is combined with a distillation column (3) intended for product separation, by conducting at least a part of the liquid flow of the column through the reactor and returning it to a lower tray than the one from which it was taken. At least half of cation exchange resin is placed in the side reactor (5-7). In the process according to the invention, the catalyst can be rapidly changed without stopping the process. In order to improve conversion additional alcohol can be fed to at least one of the side reactors.
    • PCT No.PCT / FI93 / 00097 Sec。 371日期1994年9月16日 102(e)日期1994年9月16日PCT 1993年3月18日PCT公布。 公开号WO93 / 19031 日期1993年9月30日本发明涉及一种制备叔醚的方法和装置。 根据该方法,原料中所含的C4至C6异烯烃和可能较重的烯烃在催化蒸馏反应器系统中与低级脂族醇,特别是甲醇或乙醇反应,以产生相应的醚。 根据本发明,异烯烃和醇之间的反应基本上在至少一个与用于产物分离的蒸馏塔(3)组合的反应器(5-7)中进行,至少通过至少 柱的液体流的一部分通过反应器并将其返回到比从其取出的塔的下部托盘。 将至少一半的阳离子交换树脂置于侧反应器(5-7)中。 在根据本发明的方法中,可以快速改变催化剂而不停止该方法。 为了改善转化率,另外的醇可以进料至至少一个侧反应器。
    • 6. 发明授权
    • Process for preparing alkyl ethers and mixtures thereof
    • 制备烷基醚及其混合物的方法
    • US5908964A
    • 1999-06-01
    • US803177
    • 1997-02-19
    • Matti KoskinenPetri LindqvistHarri JarvelinJuhani Aittamaa
    • Matti KoskinenPetri LindqvistHarri JarvelinJuhani Aittamaa
    • C07C41/06C07C41/42C07C43/04
    • C07C41/42C07C41/06
    • The invention concerns a process for preparing a tertiary alkyl ether product. The process comprises reacting the isoolefins of an olefinic hydrocarbon feedstock in a reaction zone (1-3) with an alkanol to form a reaction mixture, which is subjected to distillation in a first distillation zone (4). The bottoms product of the first distillation contains the ether(s), whereas the overhead stream contains unreacted alkanol and a mixture of light hydrocarbons. The overhead stream is subjected to a second distillation in a second distillation zone (15). The overhead product of the second distillation mainly contains the lightest hydrocarbons and a small amount of alkanol, and the bottoms product contains an essentially oxygenate-free hydrocarbon stream which can be used as such for alkylation. In order to increase the conversion of the process, a side drawoff is withdrawn from the second distillation zone (15) and recirculated to the reaction zone (1-3).
    • 本发明涉及一种制备叔烷基醚产物的方法。 该方法包括使反应区(1-3)中的烯烃原料的异烯烃与烷醇反应以形成反应混合物,其在第一蒸馏区(4)中进行蒸馏。 第一次蒸馏的塔底产物含有醚,而顶部物流含有未反应的链烷醇和轻烃的混合物。 塔顶流在第二蒸馏区(15)中进行第二次蒸馏。 第二次蒸馏的塔顶产物主要含有最轻的烃和少量的链烷醇,底部产物含有基本上不含氧的烃流,可用于烷基化。 为了增加该方法的转化率,从第二蒸馏区(15)取出侧抽出物并再循环至反应区(1-3)。
    • 8. 发明授权
    • Process for preparing alkyl ethers
    • 制备烷基醚的方法
    • US5536886A
    • 1996-07-16
    • US305920
    • 1994-09-16
    • Esa TamminenJuhani AittamaaJuha Jakkula
    • Esa TamminenJuhani AittamaaJuha Jakkula
    • B01J31/10B01D3/00C07B61/00C07C41/06C07C41/42C07C43/04
    • B01D3/009C07C41/06C07C41/42Y02P20/127
    • The invention relates to a process for preparing tertiary alkyl ethers. According to the process the feedstock containing hydrocarbons is fed to a catalytic distillation reactor system, in which the isoolefines, in particular the C.sub.4 to C.sub.7 isoolefines, of the feed are reacted with an alkanol in the presence of a cation exchange resin in order to produce tertiary alkyl ether products. The reaction product containing the ethers is removed from the distillation system as the bottoms product and, if necessary, it is subjected to an additional treatment for producing a gasoline component. The unreacted alkanol is removed as the overhead product of the distillation. According to the invention, the distillate withdrawn mainly contains an azeotrope of C.sub.4 hydrocarbons and alkanol, the C.sub.4 amount of which at least approximately corresponds to the C.sub.4 hydrocarbon concentration of the hydrocarbon feed, a substantial amount of the unreacted alkanol being removed in the form of said azeotrope. By means of the invention the need for a separate alkanol washing unit is eliminated in the apparatus which considerably reduces apparatus investment costs.
    • 本发明涉及一种制备叔烷基醚的方法。 根据该方法,将含有烃的原料进料到催化蒸馏反应器系统中,其中进料的异烯烃,特别是C4至C7异烯烃在阳离子交换树脂的存在下与烷醇反应,以产生 叔烷基醚产物。 含有醚的反应产物作为塔底产物从蒸馏系统中除去,如果需要,将其进行额外处理以生产汽油组分。 将未反应的链烷醇作为蒸馏塔顶产物除去。 根据本发明,取出的馏出物主要含有C 4烃和链烷醇的共沸物,其C4量至少近似对应于烃进料的C 4烃浓度,大量未反应的链烷醇以 说共沸物。 通过本发明,在装置中消除了对单独的烷醇洗涤单元的需求,这大大降低了设备的投资成本。