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    • 2. 发明申请
    • INTEGRATED PROCESS FOR PREPARING ACROLEIN AND 3-METHYLMERCAPTOPROPIONALDEHYDE
    • 用于制备丙烯酸和3-甲基哌啶酮的一体化方法
    • US20140005437A1
    • 2014-01-02
    • US13927430
    • 2013-06-26
    • Pablo ZACCHICaspar Heinrich FinkeldeiMartin Koerfer
    • Pablo ZACCHICaspar Heinrich FinkeldeiMartin Koerfer
    • C07C319/02
    • C07C319/02C07C45/28C07C319/18Y02P20/125C07C323/22C07C47/22
    • A process to produce 3-methylmercaptopropionaldehyde is provided. The process comprises: A) oxidizing a mixture of propylene and inert diluent gases with air over a heterogeneous catalyst to obtain a gaseous oxidation reaction mixture comprising acrolein and by-products; B) quenching the gaseous oxidation reaction mixture to obtain a gas stream comprising acrolein and a quench liquid comprising residual acrolein and the by-products; C) stripping the acrolein from the by-products of the quench liquid and returning the stripped acrolein to the quench; D) absorbing a first portion of the gas stream comprising acrolein from the quench B) in water to obtain an aqueous acrolein solution and an uncondensable gaseous stream comprising inert gases; D1) recycling at least a portion of the uncondensable gaseous stream to the oxidation A) to supply the inert diluent gases; E) distilling the acrolein from the aqueous acrolein solution to obtain an acrolein-free aqueous bottom product; E1) condensing the distilled acrolein; F) reacting the distilled acrolein E1) and the gas stream comprising acrolein B) with methyl mercaptan in a mixture comprising at least one of 3-methylmercaptopropionaldehyde and a hemithioacetal of methyl mercaptan and 3-methylmercaptopropionaldehyde to obtain the 3-methylmercaptopropionaldehyde.
    • 提供了制备3-甲基巯基丙醛的方法。 该方法包括:A)在多相催化剂上用空气氧化丙烯和惰性稀释气体的混合物,得到包含丙烯醛和副产物的气态氧化反应混合物; B)淬灭气态氧化反应混合物以获得包含丙烯醛和包含残余丙烯醛和副产物的骤冷液体的气流; C)从急冷液体的副产物中除去丙烯醛,并将汽提的丙烯醛返回到骤冷器中; D)从水中的骤冷B)吸收包含丙烯醛的气流的第一部分在水中以获得丙烯醛水溶液和包含惰性气体的不可冷凝气流; D1)将至少一部分不可冷凝的气流再循环到氧化物A)以供应惰性稀释气体; E)从丙烯醛水溶液中蒸馏出丙烯醛,得到无丙烯醛的含水底物; E1)冷凝蒸馏出的丙烯醛; F)使蒸馏的丙烯醛E1)和包含丙烯醛B)的气流与甲硫醇在包含3-甲基巯基丙醛和甲硫醇和3-甲基巯基丙醛的半硫缩醛中的至少一种的混合物中反应,得到3-甲基巯基丙醛。