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    • 1. 发明授权
    • Process for producing (meth)acrolein and/or (meth)acrylic acid
    • 制备(甲基)丙烯醛和/或(甲基)丙烯酸的方法
    • US07217836B2
    • 2007-05-15
    • US10479228
    • 2002-05-21
    • Seigo WatanabeMotomu Oh-KitaToshihiro Sato
    • Seigo WatanabeMotomu Oh-KitaToshihiro Sato
    • C07C51/235C07C51/16C07C45/00
    • C07C45/35C07C51/252C07C47/22C07C57/04
    • A method for producing (meth)acrolein and/or (meth)acrylic acid by subjecting isobutylene and the like or propylene to a vapor-phase catalytic oxidation with molecular oxygen in the presence of a solid oxidation catalyst in a tubular type of fixed bed reactor, wherein a temperature of a hot-spot zone is sufficiently controlled and (meth)acrolein and (meth)acrylic acid are produced with a high yield.A method for producing (meth)acrolein and/or (meth)acrylic acid by passing a raw material gas comprising isobutylene and the like or propylene and oxygen through a catalyst layer in a tubular type of fixed bed reactor which is filled with a solid oxidation catalyst, which includes passing a gas containing isobutylene and the like or propylene in a concentration lower than that of the raw material gas, and oxygen through the catalyst layer for a period of one hour or more prior to passing the raw material gas through the catalyst layer.
    • 在管式固定床反应器中,在固体氧化催化剂存在下,使用异丁烯等或丙烯进行气相催化氧化,制造(甲基)丙烯醛和/或(甲基)丙烯酸的方法 其中热点区域的温度被充分控制,并以高产率制备(甲基)丙烯醛和(甲基)丙烯酸。 通过将包含异丁烯等的原料气体或丙烯和氧气通过催化剂层在管式固定床反应器中进行填充的固体氧化物来生产(甲基)丙烯醛和/或(甲基)丙烯酸的方法 催化剂,其包括在原料气体通过催化剂之前使含有异丁烯等的气体或浓度低于原料气体的丙烯和通过催化剂层的氧持续1小时以上 层。
    • 6. 发明授权
    • Method for producing methacrylic acid
    • 生产甲基丙烯酸的方法
    • US06969774B2
    • 2005-11-29
    • US10148171
    • 2000-12-07
    • Seigo WatanabeMotomu Oh-Kita
    • Seigo WatanabeMotomu Oh-Kita
    • C07C51/25C07C57/055C07C51/235
    • C07C51/252C07C57/04
    • In a method for synthesizing methacrylic acid by using a fixed bed tube type reactor provided with a catalyst bed into which a solid oxidation catalyst is filled and with a heat medium bath and by flowing a raw material gas containing methacrolein and oxygen through the catalyst bed, the catalyst bed does not have any sections in which a temperature difference between the heat medium bath and the catalyst bed (ΔT) exceeds 35° C., and two or more high temperature zones in which each ΔT is 15 to 35° C. are provided. According to this method, mathacrylic acid can be manufactured in higher yields.
    • 在通过使用固体床管式反应器合成甲基丙烯酸的方法中,所述反应器设置有填充有固体氧化催化剂的催化剂床和热介质浴,并且使含有甲基丙烯醛和氧气的原料气体通过催化剂床流动, 催化剂床不具有其中热介质浴和催化剂床(DeltaT)之间的温差超过35℃的任何部分,并且其中每个DeltaT为15至35℃的两个或更多个高温区域为 提供。 根据该方法,能够以较高的收率制造数学丙烯酸。