会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • PROCESS FOR PRODUCTION OF (METH) ACRYLIC ACID
    • (甲基)丙烯酸生产方法
    • US20120046495A1
    • 2012-02-23
    • US13266672
    • 2010-05-07
    • Yoshitake IshiiKoji Ueno
    • Yoshitake IshiiKoji Ueno
    • C07C51/43
    • B01D9/0013C07C51/43C07C57/04
    • The objective of the present invention is to provide a process for producing highly pure (meth) acrylic acid stably and efficiently with crystallization. The process for production of (meth)acrylic acid according to the present invention is characterized in comprising the steps of cooling a crude (meth)acrylic acid solution in a crystallization apparatus until the temperature of a cooling medium discharged from the crystallization apparatus is stabilized in the range of higher than the solidification point of the crude (meth)acrylic acid solution in the crystallization apparatus and not more than the solidification point plus 5° C.; then bringing the crude (meth)acrylic acid solution in the crystallization apparatus to a supercooled condition by setting the temperature of a cooling medium supplied to the crystallization apparatus at the temperature of not more than the solidification point of the crude (meth)acrylic acid solution minus 1° C.; and crystallizing (meth)acrylic acid from the crude (meth)acrylic acid solution.
    • 本发明的目的是提供一种通过结晶稳定且有效地生产高纯度(甲基)丙烯酸的方法。 根据本发明的(甲基)丙烯酸的制备方法的特征在于包括以下步骤:在结晶装置中冷却粗(甲基)丙烯酸溶液,直到从结晶装置排出的冷却介质的温度稳定 高于结晶装置中粗(甲基)丙烯酸溶液的凝固点的范围,不超过凝固点加5℃的范围。 然后通过将供给结晶装置的冷却介质的温度设定为不高于粗(甲基)丙烯酸溶液的凝固点的温度,将粗(甲基)丙烯酸溶液在结晶装置中进行过冷却 零下1摄氏度。 和从(甲基)丙烯酸粗溶液中结晶(甲基)丙烯酸。
    • 9. 发明授权
    • Method for crystallizing (meth)acrylic acid and method for regulating content of polymerization inhibitor in product (meth)acrylic acid
    • (甲基)丙烯酸结晶方法及其制备(甲基)丙烯酸中阻聚剂含量的方法
    • US08704000B2
    • 2014-04-22
    • US13322633
    • 2010-05-27
    • Kazuhiko SakamotoKoji UenoYoshitake IshiiHarunori HiraoSatoshi Nakagawa
    • Kazuhiko SakamotoKoji UenoYoshitake IshiiHarunori HiraoSatoshi Nakagawa
    • C07C51/43C07C51/50
    • C07C51/43C07C57/04
    • PROBLEMThere is provided a melting method of (meth)acrylic acid crystal which is capable of providing a higher quality of (meth)acrylic acid without carrying out an additional purification treatment to (meth)acrylic acid obtained by a crystallization operation accompanied by melting of (meth)acrylic acid. In addition, there is provided a simple method for adjusting a content of polymerization inhibitor in a product (meth)acrylic acid.SOLUTIONIn the crystallization method melting (meth)acrylic acid crystal while wetting with the crystalline molten liquid, a polymerization inhibitor is added to a molten liquid melted after initiation of melting, and all of crystal is melted while circulating and feeding the molten liquid containing said polymerization inhibitor to the crystal. In addition, a content of polymerization inhibitor in product (meth)acrylic acid is adjusted by adding a predetermined amount of polymerization inhibitor corresponding to a product specification to the molten liquid melted after initiation of melting.
    • 问题提供了(甲基)丙烯酸晶体的熔融方法,其能够提供更高质量的(甲基)丙烯酸,而不对通过伴随熔化的结晶操作获得的(甲基)丙烯酸进行额外的纯化处理 (甲基)丙烯酸。 此外,提供了调节产物(甲基)丙烯酸中阻聚剂含量的简单方法。 解决方案在熔融(甲基)丙烯酸晶体的结晶方法中,与结晶熔融液体一起润湿的同时,在熔融开始后熔化的熔融液中加入聚合抑制剂,并且在循环并将含有 阻聚剂结晶。 此外,通过向熔融开始熔融的熔融液中加入与产品规格相对应的规定量的聚合抑制剂来调节产品(甲基)丙烯酸中的聚合抑制剂的含量。