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    • 96. 发明授权
    • Method for drying granular water-containing gel-like cross-linked polymer
    • 颗粒状含水凝胶状交联聚合物的干燥方法
    • US08875415B2
    • 2014-11-04
    • US13583144
    • 2011-03-07
    • Yoshio Irie
    • Yoshio Irie
    • C08F6/06C08F6/00B01J2/26C08L33/02C08F22/02B01D1/24A61L15/22A61L15/60C08J3/12
    • C08F6/008A61L15/22A61L15/60B01D1/24B01J2/26C08F22/02C08J3/12C08J2300/14C08L33/02C08L33/06
    • The present invention is to provide a drying method by which both cost reduction and superior physical properties can be attained in a step which comprises subjecting a water-containing gel-like crosslinked polymer obtained by polymerizing an aqueous monomer solution to fine granulation during or after the polymerization, and drying the resultant particulate water-containing gel-like crosslinked polymer with a through-circulation band dryer. The method has a feature in that the drying conditions over a period from a time of introducing the particulate water-containing gel-like crosslinked polymer into a drying zone of the through-circulation band dryer to a time of reaching a solid content concentration thereof to 80% by weight, satisfy that (1) a difference of temperature between a temperature of hot air blown to a particulate hydrogel layer and a temperature measured after the hot air passes through the particulate hydrogel layer is 20 to 70° C.
    • 本发明提供一种干燥方法,其可以在以下步骤中实现成本降低和物理性能优异的步骤:将含有单体溶液聚合得到的含水凝胶状交联聚合物在 聚合,并用通过循环带式干燥器干燥得到的含颗粒状含水凝胶状交联聚合物。 该方法的特征在于,在将含颗粒状含水凝胶状交联聚合物引入通循环带式干燥机的干燥区域到达固体成分浓度的时间的期间内的干燥条件为 80重量%,满足以下(1)吹送到颗粒状水凝胶层的热空气的温度与热空气通过颗粒状水凝胶层后测量的温度之间的温度差为20〜70℃。
    • 97. 发明授权
    • Device and process for crystallizing (meth)acrylic acid
    • 用于结晶(甲基)丙烯酸的装置和方法
    • US08859809B2
    • 2014-10-14
    • US13381449
    • 2010-06-24
    • Kazuhiko SakamotoKoji UenoYoshitake IshiiMasatsugu Kitaura
    • Kazuhiko SakamotoKoji UenoYoshitake IshiiMasatsugu Kitaura
    • C07C51/42B01D9/00C07C51/43
    • B01D9/0013B01D9/0063C07C51/43C07C57/04
    • A crystallization device and a crystallization process are provided for obtaining (meth)acrylic acid with higher purity without causing leakage of a crude solution by preventing complete clogging in a crystallization tube from occurring. The device for crystallizing (meth)acrylic acid includes a crude (meth)acrylic acid solution supply part, a crystallization tube, a heat medium supply tube, a heat medium discharge tube, a storage part of a crude (meth)acrylic acid solution passed through the crystallization tube, a tube for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and a pump for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and also includes a pressure meter in the circulate-supply tube. The device is used for carrying out dynamic crystallization in a batch manner by circulating the crude (meth)acrylic acid solution to flow the crude solution downward along the inner wall of the crystallization tube in a coating film-like state.
    • 提供了一种结晶装置和结晶方法,用于获得高纯度的(甲基)丙烯酸,而不会通过防止结晶管中发生完全堵塞而导致粗溶液泄漏。 用于结晶(甲基)丙烯酸的装置包括粗(甲基)丙烯酸溶液供应部分,结晶管,热介质供应管,热介质放电管,粗(甲基)丙烯酸溶液的储存部分通过 通过结晶管,将来自储存部的粗(甲基)丙烯酸溶液循环供给到供给部的管,以及从储存部向供给部循环供给粗(甲基)丙烯酸溶液的泵 并且还包括在循环供应管中的压力计。 该装置用于以分批方式进行动态结晶,通过循环粗制(甲基)丙烯酸溶液使涂料膜状态沿着结晶管的内壁向下流动粗溶液。
    • 98. 发明授权
    • Polyacrylic acid (salt)-type water absorbent resin and method for producing of same
    • 聚丙烯酸(盐)型吸水性树脂及其制造方法
    • US08859685B2
    • 2014-10-14
    • US13392214
    • 2010-08-27
    • Kozo NogiKunihiko IshizakiKazumasa Konishi
    • Kozo NogiKunihiko IshizakiKazumasa Konishi
    • C08F20/06C08J3/24C08F8/30C08F8/42A61L15/60C08F220/06C08F120/06A61L15/24
    • A61L15/24A61L15/60C08F120/06C08F220/06C08J3/24C08J3/245C08J2300/14C08J2333/02C08L33/08C08F2222/1013
    • A process for producing a water absorbent resin is provided with which it is possible to efficiently and inexpensively obtain a surface-crosslinked water-absorbing resin having excellent material properties, while ensuring high productivity. In continuous production scaled up to a large scale (in particular, 1 t/hr or more), the physical properties are improved and stabilized (for example, a reduction in standard deviation of the physical properties) by a surface crosslinking treatment to further improve absorption against pressure (AAP) and saline flow conductivity (SFC). The process for producing a polyacrylic acid (salt)-type water absorbent resin includes a surface treatment step in which after addition of a surface-crosslinking agent, a crosslinking reaction is conducted in a transverse type continuous stirring apparatus having stirring means including a feeding inlet and a discharging outlet of a water absorbent resin and one or more rotary shafts having with a plurality of stirring discs, and heating means, at a stirring-power index of the device of 3-15 W·hr/kg. (Stirring-power index)=((power consumption of apparatus at the time surface treatment)−(power consumption at the time of idling))×average retention time)/(treatment amount per unit time×average retention time).
    • 提供一种生产吸水性树脂的方法,其可以有效且廉价地获得具有优异材料性能的表面交联吸水性树脂,同时确保高生产率。 在大规模(特别是1t / hr以上)的连续生产中,物理性能通过表面交联处理得到改善和稳定(例如物理性能的标准偏差的降低),以进一步改善 吸收抗压力(AAP)和盐水流动电导率(SFC)。 制备聚丙烯酸(盐)型吸水性树脂的方法包括表面处理步骤,其中加入表面交联剂后,在具有搅拌装置的横向连续搅拌装置中进行交联反应,所述搅拌装置包括进料口 以及具有多个搅拌盘的吸水性树脂的排出口和具有多个搅拌盘和加热装置的装置的搅拌功率指数为3-15W·hr / kg的一个或多个旋转轴。 (搅拌功率指数)=((表面处理时的设备的功率消耗) - (怠速时的功耗)×平均保持时间)/(每单位时间处理量×平均保持时间)。