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    • 2. 发明申请
      US20220153667A1 METHOD FOR PRODUCING DIOL 有权
    • METHOD FOR PRODUCING DIOL
    • US20220153667A1
    • 2022-05-19
    • US17527705
    • 2021-11-16
    • Nippon Shokubai Co., Ltd.
    • Akimasa WATANABE , Akiko YAMAUCHI
    • C07C29/52 , C07C29/80 , B01D3/12 , B01D3/14
    • [Objective] An object is to provide a method for producing a diol by which diols having a favorable color scale and containing a reduced amount of an unsaturated aliphatic hydrocarbon can be produced.
      [Solution] A method for producing a diol, including a) supplying metaboric acid, a saturated aliphatic hydrocarbon and a reaction gas containing molecular oxygen to a reactor and performing liquid-phase oxidation of the saturated aliphatic hydrocarbon with the reaction gas containing molecular oxygen in the presence of metaboric acid to obtain a reaction liquid containing an oxide, b) esterifying the oxide to obtain a reaction liquid containing a borate compound, c) separating the reaction liquid containing a borate compound into an unreacted saturated aliphatic hydrocarbon and a distillation residue by distillation, d) separating the distillation residue into orthoboric acid and an organic layer by hydrolysis, e) separating the organic layer into an alkali aqueous solution layer and a crude alcohol layer by saponification with an alkali, and f) performing first distillation on the crude alcohol layer to remove a monoalcohol, and then performing second distillation on the residual liquid under conditions of a temperature of lower than 250° C. and a residence time of shorter than 60 minutes.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 3. 发明申请
      US20160052900A1 METHOD FOR PRODUCING ETHYLENE OXIDE 有权
    • METHOD FOR PRODUCING ETHYLENE OXIDE
    • 生产乙烯氧化物的方法
    • US20160052900A1
    • 2016-02-25
    • US14781245
    • 2014-03-28
    • NIPPON SHOKUBAI CO., LTD.
    • Akimasa WATANABE , Takahiro TAKINAMI , Noriji MORIKAWA
    • C07D301/10 , C07D301/32
    • C07D301/10 , B01D53/1406 , B01D53/1475 , B01D53/1487 , B01D53/62 , B01D53/78 , B01D2251/304 , B01D2251/306 , B01D2251/604 , B01D2252/103 , B01D2256/24 , B01D2257/504 , B01D2259/65 , C07D301/32 , Y02C10/04 , Y02C10/06 , Y02P20/121 , Y02P20/124 , Y02P20/152 , Y02P20/51
    • [Problem] To provide a novel technology by which energy efficiency can be further improved in a process for producing ethylene oxide.[Solution] A method for producing ethylene oxide including: an ethylene oxidation reaction step in which ethylene is subjected to catalytic vapor-phase oxidation using a molecular oxygen-containing gas in the presence of a silver catalyst; supplying an ethylene oxide-containing reaction product gas produced in the ethylene oxidation reaction step to an ethylene oxide absorption column; bringing the reaction product gas into contact with an absorption liquid supplied to the ethylene oxide absorption column; supplying an ethylene oxide-containing column bottom liquid of the ethylene oxide absorption column to an ethylene oxide purification system; purifying ethylene oxide in the ethylene oxide purification system; supplying at least a part of a carbon dioxide gas-containing gas discharged from a column top part of the ethylene oxide absorption column to a carbon dioxide gas absorption column; extracting a carbon dioxide gas-rich absorption liquid obtained by contact of the carbon dioxide gas-containing gas with an absorption liquid as a column bottom liquid of the carbon dioxide gas absorption column; supplying the carbon dioxide gas-rich absorption liquid to an upper part of the carbon dioxide gas stripper column; stripping the carbon dioxide gas from the carbon dioxide gas-rich absorption liquid; and discharging the carbon dioxide gas from a column top part of the carbon dioxide gas stripper column as an exhaust gas, the ethylene oxide purification system including an ethylene oxide purification column provided with a reboiler in a lower part thereof, and a heating medium for heating the reboiler being heated by heat exchange with the exhaust gas.
    • [问题]提供一种在生产环氧乙烷的方法中能够进一步提高能量效率的新型技术。 [方案]一种生产环氧乙烷的方法，包括：乙烯氧化反应步骤，其中在银催化剂存在下，使用含分子氧的气体对乙烯进行催化气相氧化; 将在乙烯氧化反应步骤中生产的含环氧乙烷的反应产物气体供应到环氧乙烷吸收塔; 使反应产物气体与供应到环氧乙烷吸收塔的吸收液接触; 将环氧乙烷吸收塔的含环氧乙烷的塔底液供给环氧乙烷净化系统; 在环氧乙烷净化系统中净化环氧乙烷; 将从环氧乙烷吸收塔的塔顶部排出的含二氧化碳气体的气体的至少一部分供给到二氧化碳气体吸收塔; 提取通过含有二氧化碳气体的气体与作为二氧化碳气体吸收塔的塔底液的吸收液体接触而得到的二氧化碳气体浓度吸收液; 将二氧化碳气体富集的吸收液体供给到二氧化碳气体汽提塔的上部; 从富含二氧化碳气体的吸收液中汽提二氧化碳气体; 从作为废气的二氧化碳气体汽提塔的塔顶部排出二氧化碳气体，所述环氧乙烷净化系统包括在其下部设置有再沸器的环氧乙烷净化塔和加热用加热介质 再沸器通过与排气的热交换而被加热。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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