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    • 86. 发明授权
    • Method for refining (meth)acrylic acid
    • 精制(甲基)丙烯酸的方法
    • US06540881B1
    • 2003-04-01
    • US09532225
    • 2000-03-22
    • Kazuhiko SakamotoKouji UenoSei NakaharaMasatoshi Ueoka
    • Kazuhiko SakamotoKouji UenoSei NakaharaMasatoshi Ueoka
    • B01D342
    • C07C51/44C07C51/23C07C51/252C07C51/50Y10S203/22C07C57/04
    • This invention relates to a method for preventing (meth)acrylic acid from polymerizing during the course of distillation. The method provides for refining (meth)acrylic acid by a procedure including the steps of feeding a mixed gas obtained by catalytic gas phase oxidation of propylene and/or acrolein with a molecular oxygen-containing gas or a mixed gas obtained by catalytic gas phase oxidation of at least one compound of isobutylene, t-butyl alcohol, or methacrolein with a molecular oxygen-containing gas, to a (meth)acrylic acid collection column, collecting a (meth)acrylic acid-containing solution from the mixed gas, and feeding the (meth)acrylic acid-containing solution to a distillation column while maintaining the total concentration of aldehydes of 2-4 carbon atoms and acetone in the solution at a level of not more than 2000 ppm based on the amount of (meth)acrylic acid.
    • 本发明涉及一种在蒸馏过程中防止(甲基)丙烯酸聚合的方法。 该方法通过以下步骤提供(甲基)丙烯酸的精制,包括以下步骤:将通过丙烯和/或丙烯醛的催化气相氧化获得的混合气体与含分子氧的气体或通过催化气相氧化获得的混合气体 的至少一种异丁烯,叔丁醇或甲基丙烯醛的化合物与含分子氧的气体反应到(甲基)丙烯酸收集塔,从混合气体中收集(甲基)丙烯酸的溶液,并进料 (甲基)丙烯酸溶液,同时维持2-4个碳原子的醛和丙酮的总浓度在不超过2000ppm的水平下,基于(甲基)丙烯酸的量 。
    • 88. 发明授权
    • Method for handling waste oil
    • 处理废油的方法
    • US06414183B1
    • 2002-07-02
    • US09543743
    • 2000-04-05
    • Kazuhiko SakamotoSei NakaharaMasatoshi Ueoka
    • Kazuhiko SakamotoSei NakaharaMasatoshi Ueoka
    • C07C6954
    • C07C51/42C07C51/252C07C67/39C07C57/04C07C69/54
    • The present invention provides a method for stabilizing waste oil which is taken of each chemical apparatus of the manufacturing line of (meth)acryl acid and/or ester thereof, and treating the waste oil such as draining it out of the production apparatus, for example, a distillation tower from its bottom, sending and transporting it by a pump through a pipeline, and storing it in a storage tank in a simple manner while keeping the waste oil in a stable state. The waste oil can be stabilized by coexisting with solvent. The solvent used in the present invention is typically at least one selected from the group consisting of water, alcohol, ether, carboxylic acid, ketone, aromatic hydrocarbons, and aliphatic hydrocarbons.
    • 本发明提供了一种稳定废油的方法,该方法取自(甲基)丙烯酸和/或其酯的生产线的每个化学装置,并将废油例如从生产装置中排出,例如 ,蒸馏塔从底部通过泵送出并通过管道运输,并以简单的方式将其储存在储罐中,同时保持废油处于稳定状态。 废油可以通过与溶剂共存而稳定。本发明中使用的溶剂通常为选自水,醇,醚,羧酸,酮,芳族烃和脂族烃中的至少一种。