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    • 3. 发明专利
    • Method for producing methacrolein and/or methacrylic acid
    • 生产甲基纤维素和/或甲基丙烯酸的方法
    • JP2009114119A
    • 2009-05-28
    • JP2007288469
    • 2007-11-06
    • Nippon Kayaku Co Ltd日本化薬株式会社
    • KURAGAMI TATSUHIKOSUDO ATSUSHIKOJIMA TOSHITAKE
    • C07C45/32C07B61/00C07C47/22C07C51/21C07C57/055
    • C07C45/37C07C45/35C07C51/252C07C47/22C07C57/04
    • PROBLEM TO BE SOLVED: To provide a method for producing methacrolein and/or methacrylic acid, which maintains a high yield and an effective selectivity over a long period of time. SOLUTION: In the method for producing methacrolein and/or methacrylic acid, with which tertiary butanol and/or isobutylene as a raw material is fed to a reaction tube packed with an oxidation catalyst so as to have two exothermic peaks in the gas flow direction of the reaction tube and the raw material is partially oxidized in the presence of molecular oxygen, when the minimum value of temperature between the two exothermic peaks of two oxidation catalyst layers is Tm and the reaction bath temperature is Tb, the minimum value of temperature and the reaction bath temperature satisfy the relation represented by the formula Tm-Tb≥15°C. COPYRIGHT: (C)2009,JPO&INPIT
    • 待解决的问题:提供一种生产甲基丙烯醛和/或甲基丙烯酸的方法,其在长时间内保持高产率和有效选择性。 解决方案:在制备甲基丙烯醛和/或甲基丙烯酸的方法中,以叔丁醇和/或异丁烯为原料,将其加入装有氧化催化剂的反应管中,使其在气体中具有两个放热峰 当分子氧存在时,反应管和原料的流动方向被部分氧化,当两个氧化催化剂层的两个放热峰之间的温度的最小值为Tm,反应浴温度为Tb时,其最小值为 温度和反应浴温度满足由式Tm-Tb≥15℃表示的关系。 版权所有(C)2009,JPO&INPIT