Device for spray-drying solvent-containing compositions
    1.
    发明授权
    Device for spray-drying solvent-containing compositions 失效
    用于喷雾干燥含溶剂的组合物的装置

    公开(公告)号:US06769200B2

    公开(公告)日:2004-08-03

    申请号:US10275533

    申请日:2002-11-04

    IPC分类号: F26B308

    CPC分类号: C11D11/02 B01D1/18 F26B3/12

    摘要: An apparatus and method for the spray drying of solvent-containing compositions. A liquid or paste-form solvent-containing composition is heated to a temperature above the boiling point of the solvent, transported under excess pressure and at a temperature above the boiling point of the solvent to a relaxation space where it is sprayed to evaporate the solvent. The relaxation space is not under excess pressure and is at a temperature that is above the boiling point of the solvent.

    摘要翻译: 用于喷雾干燥含溶剂的组合物的装置和方法。 将含液体或糊状溶剂的组合物加热到高于溶剂沸点的温度,在过压下和高于溶剂沸点的温度下运输至松弛空间,在其中喷雾以蒸发溶剂 。 松弛空间不在过压之下,处于高于溶剂沸点的温度。

    Continuous moving bed reactor for manufacture of high molecular weight
polyethylene terephthalate
    3.
    发明授权
    Continuous moving bed reactor for manufacture of high molecular weight polyethylene terephthalate 失效
    用于制造高分子量聚对苯二甲酸乙二醇酯的连续移动床反应器

    公开(公告)号:US4361538A

    公开(公告)日:1982-11-30

    申请号:US244658

    申请日:1981-03-17

    摘要: High molecular weight polyethylene terephthalate (PET) is obtained by solid state polycondensation of low molecular weight polymer granulate or chips. The present invention relates to a moving bed reactor wherein the crystallized, low molecular weight polymer granulate or chips move by gravity flow from the top to the bottom of a cylindrical, vertical reactor. By means of an automatic sampling system, samples of the polymer chips are taken from different points in the moving bed and analyzed to continuously establish the intrinsic viscosity, i.e. molecular weight, of the chips. A countercurrent flow of cold and/or heated gas and the chip residence time are then adjusted in response to the viscosity profile in the reactor in order to control and achieve a desired chip quality.

    摘要翻译: 通过低分子量聚合物颗粒或碎片的固态缩聚获得高分子量聚对苯二甲酸乙二醇酯(PET)。 本发明涉及一种移动床反应器,其中结晶的低分子量聚合物颗粒或碎屑通过重力流从圆柱形立式反应器的顶部移动到底部。 通过自动采样系统,聚合物芯片的样品取自移动床中的不同点,并分析以连续地确定芯片的特性粘度,即分子量。 然后响应于反应器中的粘度分布来调节冷和/或加热气体的逆流和芯片停留时间,以便控制并实现期望的芯片质量。

    Column system process for polyester plants
    4.
    发明授权
    Column system process for polyester plants 失效
    聚酯工厂的柱系统工艺

    公开(公告)号:US4254246A

    公开(公告)日:1981-03-03

    申请号:US23831

    申请日:1979-03-26

    IPC分类号: C07C29/80 C07C69/82

    CPC分类号: C07C29/80 Y10S203/06

    摘要: A new process for use with continuously operated plants for the production of polyester polymers suitable for producing fibers, bottles and film, by reacting ethylene glycol and terephthalic acid in the presence of a catalyst so that the vapour by-products from the esterification, prepolycondensation and polycondensation stages are continuously rectified in two in-line columns yielding ethylene glycol of high purity (99.85%) which is returned to the process, waste water with 400 ppm ethylene glycol, and a heavy fraction containing oligomers, diethylene glycol, etc.Moreover, an improvement in the quality of the esterified product is attained as it contains less than 0.6% diethylene glycol without the use of diisopropylamine, a poisonous additive.

    摘要翻译: 一种用于生产适用于生产纤维,瓶和薄膜的聚酯聚合物的连续操作设备的新方法,通过使乙二醇和对苯二甲酸在催化剂存在下反应,使得来自酯化,预缩聚的蒸气副产物和 缩聚阶段在两个直列柱中连续精馏,得到高纯度(99.85%)的乙二醇,并返回该方法,含有400ppm乙二醇的废水和含低聚物,二甘醇等的重馏分。此外, 得到酯化产物质量的改善,因为它含有少于0.6%的二甘醇,而不使用二异丙胺(一种有毒添加剂)。

    Continuous process for the recovery of caprolactam
    5.
    发明授权
    Continuous process for the recovery of caprolactam 失效
    持续的己内酰胺回收方法

    公开(公告)号:US4107160A

    公开(公告)日:1978-08-15

    申请号:US827370

    申请日:1977-08-24

    IPC分类号: C07D201/12 C07D201/16

    CPC分类号: C07D201/16 C07D201/12

    摘要: A process for the continuous recovery of caprolactam from either solid polycaprolactam waste by depolymerization or from liquid polycaprolactam extraction water from an extraction zone where, in either instance, a caprolactam water vapor mixture is produced and subsequently upgraded in a distillation zone to provide a dilute mixture of caprolactam and water vapor. A minor portion of this dilute caprolactam water vapor is condensed and recycled to the distillation zone. The remaining, major portion of this mixture is compressed and admixed with fresh steam, superheated and passed to either the extraction zone or depolymerization reaction.

    摘要翻译: 从固体聚己内酰胺废物通过解聚连续回收己内酰胺或从液体聚己内酰胺萃取水中从萃取区连续回收己内酰胺的方法,其中在任何一种情况下产生己内酰胺水蒸气混合物,随后在蒸馏区中升级以提供稀释混合物 的己内酰胺和水蒸汽。 该稀少己内酰胺水蒸气的一小部分被冷凝并再循环到蒸馏区。 将该混合物的剩余部分压缩并与新鲜蒸汽混合,过热并通过萃取区或解聚反应。