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    • 4. 发明授权
    • High velocity fluid flow electric heater
    • 高速流体流动电加热器
    • US09074819B2
    • 2015-07-07
    • US13439543
    • 2012-04-04
    • Craig S. TirasDavid Griffith
    • Craig S. TirasDavid Griffith
    • F27D11/00F27D11/02
    • F27D11/02
    • An electrical heater has first and second heater elements, each having a hairpin-shaped metal tube with an upstream and a downstream leg and tube ends adjacent each other. An electrical resistance wire surrounded by insulation powder extends through the tube. Electrical terminals join to the wire and protrude from each of the tube ends. Conduits enclose the upstream and the downstream legs of the heater elements, providing a continuous annular flow path. A manifold has heater element passages for end portion of the legs. An inlet passage in the manifold leads from an exterior portion of the manifold to the annular flow path surrounding the upstream leg of the first heater element. A transfer passage within the manifold leads from the annular flow path surrounding the downstream leg of the first heater element to the annular flow path surrounding the upstream leg of the second heater element.
    • 电加热器具有第一和第二加热器元件,每个具有发夹形金属管,其具有上游和下游腿以及管彼此相邻的端部。 由绝缘粉末包围的电阻丝穿过管延伸。 电端子连接到电线并从每个管端突出。 管道包围加热器元件的上游和下游腿部,提供连续的环形流动路径。 歧管具有用于腿的端部的加热器元件通道。 歧管中的入口通道从歧管的外部部分引导到围绕第一加热器元件的上游支腿的环形流动路径。 歧管内的传送通道从包围第一加热器元件的下游腿部的环形流动路径引导到围绕第二加热器元件的上游支腿的环形流动路径。
    • 7. 发明申请
    • Continuous process for producing poly (trimethylene terephthalate)
    • 生产聚对苯二甲酸丙二醇酯的连续工艺
    • US20050165178A1
    • 2005-07-28
    • US11093092
    • 2005-03-29
    • Carl GiardinoDavid GriffithChungfan HoJames HowellMichelle Watkins
    • Carl GiardinoDavid GriffithChungfan HoJames HowellMichelle Watkins
    • C08F2/00C08G63/183C08G63/78C08G85/00
    • C08G63/183C08G63/78Y10T428/2913Y10T428/31786
    • A continuous process for the production of poly(trimethylene terephthalate) is disclosed. According to the process, a liquid feed mixture comprising bis-3-hydroxypropyl terephthalate and/or low molecular weight polyesters of 1,3-propanediol and terephthalic acid, the liquid feed mixture having a mole ratio of propylene groups to terephthalate groups of 1.1 to 2.2 is fed to a flasher. A first stream of gaseous by-products is continuously vaporized and removed from the flasher, and a liquid flasher reaction product having a mole ratio of propylene groups to terephthalate groups of less than about 1.5 is continuously withdrawn from the flasher. The liquid flasher reaction product is continuously fed to a prepolymerizer where it is continuously polymerized to form a poly(trimethylene terephthalate) prepolymer and a second stream of gaseous by-products. Poly(trimethylene terephthalate) prepolymer having a relative viscosity of at least about 5 is continuously withdrawn from the prepolymerizer and continuously fed to a final polymerizer, where it is continuously polymerized to form a higher molecular weight poly(trimethylene terephthalate) and a third stream of gaseous by-products. Higher molecular weight poly(trimethylene terephthalate) having a relative viscosity of at least about 17 is continuously withdrawn from the final polymerizer.
    • 公开了生产聚(对苯二甲酸丙二醇酯)的连续方法。 根据该方法,将包含1,3-丙二醇和对苯二甲酸的低分子量聚酯的双-3-羟丙基对苯二甲酸酯和/或低分子量聚酯的液体进料混合物,该丙烯与对苯二甲酸酯基的摩尔比为1.1〜 2.2被送入闪光器。 气态副产物的第一流被持续蒸发并从闪蒸器中除去,并且具有小于约1.5的丙烯与对苯二甲酸酯基的摩尔比的液体闪蒸反应产物从闪蒸器中连续排出。 将液体闪蒸反应产物连续进料到预聚合器中,在其中连续聚合以形成聚(对苯二甲酸丙二醇酯)预聚物和第二气态副产物流。 相对粘度至少为约5的聚(对苯二甲酸丙二醇酯)预聚物从预聚合器中连续排出,并连续进料至最终聚合反应器,在其中连续聚合形成较高分子量的聚对苯二甲酸丙二醇酯 气态副产品。 相对粘度至少约为17的较高分子量聚(对苯二甲酸丙二醇酯)从最终聚合反应器中连续排出。