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    • 4. 发明申请
    • PRODUCTION METHOD OF METHYL METHACRYLATE
    • 甲基丙烯酸甲酯的生产方法
    • US20090209782A1
    • 2009-08-20
    • US12294068
    • 2007-03-28
    • Masahiko MizunoTateo SeoTetsuya Suzuta
    • Masahiko MizunoTateo SeoTetsuya Suzuta
    • C07C69/54
    • C07C67/38C07C69/54
    • A method of producing methyl methacrylate comprising the following steps: Thermal decomposition step: a hydrocarbon having 3 or more carbon atoms is thermally decomposed to obtain a decomposed gas having a total content of propyne and propadiene of 2 wt % or more, Separation step: mixed liquid rich in propyne and propadiene is separated from the decomposed gas obtained in the thermal decomposition step, Propyne purification step: the mixed liquid rich in propyne and propadiene obtained in the separation step is subjected to extractive distillation, for separation into purified propyne, and crude propadiene containing propadiene as the main component, Isomerization step: the crude propadiene obtained in the propyne purification step is isomerized in the presence of an isomerization catalyst, to obtain crude propyne containing propyne as the main component, and Carbonylation step: the purified propyne obtained in the propyne purification step is reacted with carbon monoxide and methanol in the presence of a group VIII metal catalyst system, to produce methyl methacrylate.
    • 一种生产甲基丙烯酸甲酯的方法,包括以下步骤:热分解步骤:将具有3个或更多碳原子的烃热分解,得到丙炔和丙二烯的总含量为2重量%以上的分解气体,分离步骤:混合 丙烯和丙二烯的液体与热分解步骤中分解的气体分离,丙炔纯化步骤:将分离步骤中得到的富含丙炔和丙二烯的混合液进行萃取蒸馏,分离成纯化丙炔, 以丙二烯为主要成分的丙二烯异构化步骤:在丙炔纯化步骤中得到的粗丙二烯在异构化催化剂存在下异构化,得到含有丙炔的粗丙炔作为主要成分,羰基化步骤:将纯化的丙炔 丙炔纯化步骤与一氧化碳和甲醇反应 在VIII族金属催化剂体系的存在下,生产甲基丙烯酸甲酯。
    • 6. 发明授权
    • Method for purifying pyruvic acid compounds
    • 丙酮酸化合物的纯化方法
    • US06348617B1
    • 2002-02-19
    • US09284263
    • 1999-06-21
    • Hideki UshioMotoo HazamaToshikazu YagiAkihiko NakamuraMasahiko Mizuno
    • Hideki UshioMotoo HazamaToshikazu YagiAkihiko NakamuraMasahiko Mizuno
    • C09C6966
    • C07C67/343C07C67/60C07C69/716
    • The present invention is directed to a method for purifying pyruvic acid compounds, which method comprises reacting a pyruvic acid compound of general formula (I): wherein R1 is an optionally substituted lower alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl group, an aryl group, or a heterocyclic group, and R2 is a lower alkyl group, with a bisulfite of general formula (II): MHSO3  (II) wherein M is NH4 or an alkali metal, to give a bisulfite adduct of the pyruvic acid compound and then decomposing the adduct with an acid. According to the present invention, pyruvic acid compounds can be purified by simple and easy procedures without using purification techniques such as distillation or column chromatography, and the above method is advantageous as a process for the production on an industrial scale.
    • 本发明涉及一种纯化丙酮酸化合物的方法,该方法包括使通式(I)的丙酮酸化合物:其中R 1为任选取代的低级烷基,低级烯基,低级炔基, 环烷基,芳基或杂环基,R2是低级烷基,与通式(II)的亚硫酸氢盐反应:其中M是NH 4或碱金属,得到丙酮酸化合物的亚硫酸氢盐加合物和 然后用酸分解加合物。 根据本发明,丙酮酸化合物可以通过简单且简单的方法纯化,而不使用蒸馏或柱色谱法等纯化技术,上述方法作为工业规模生产的方法是有利的。