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    • 25. 发明申请
    • METHOD FOR PRODUCING METHACRYLIC ALKYL ESTERS BY WAY OF AZEOTROPIC DISTILLATION
    • 通过AZEOTROPIC蒸馏法生产甲基丙烯酸酯的方法
    • US20100029881A1
    • 2010-02-04
    • US12516629
    • 2007-08-31
    • Udo GroppRobert WeberThomas SchaeferAndreas PerlRudolf SingThomas Mertz
    • Udo GroppRobert WeberThomas SchaeferAndreas PerlRudolf SingThomas Mertz
    • C08F118/02C07C67/22B01J19/00
    • C07C231/06B01D3/36C07C67/20C07C67/54C07C69/54C07C233/09
    • The present invention relates in general terms to a process for preparing alkyl methacrylates, comprising as steps: providing an acetone cyanohydrin by a process according to one of the preceding claims; contacting the acetone cyanohydrin with an inorganic acid to obtain a methacrylamide; contacting the methacrylamide with an alcohol in the presence of an inorganic acid in a reactor to obtain an alkyl methacrylate; continuously discharging at least a portion of the alkyl methacrylate from the reactor into a distillation column as a vapour stream; the discharge being effected by feeding a discharge stream comprising steam into the reactor, to an apparatus for preparing alkyl methacrylates, to a process for preparing polymers based at least partly on alkyl methacrylates, to the use of the alkyl methacrylates obtainable by the process according to the invention in chemical products, and to chemical products based on alkyl methacrylates obtainable by the process according to the invention.
    • 本发明一般涉及制备甲基丙烯酸烷基酯的方法,其包括如下步骤:通过根据前述权利要求之一的方法提供丙酮氰醇; 使丙酮氰醇与无机酸接触,得到甲基丙烯酰胺; 使甲基丙烯酰胺与醇在无机酸存在下在反应器中接触,得到甲基丙烯酸烷基酯; 将至少一部分甲基丙烯酸烷基酯从反应器连续排出到作为蒸气流的蒸馏塔中; 排放是通过将包含蒸汽的排出物流进入反应器,到制备甲基丙烯酸烷基酯的装置,至少部分地基于甲基丙烯酸烷基酯制备聚合物的方法,使用可通过根据 化学产品中的发明,以及基于通过本发明的方法获得的基于甲基丙烯酸烷基酯的化学产品。