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28 条记录 (耗时 0.023 秒)

    NMR system for measuring polymer properties
    1.
    发明授权
    NMR system for measuring polymer properties 失效
    用于测量聚合物性质的NMR系统

    公开(公告)号：US5408181A

    公开(公告)日：1995-04-18

    申请号：US113833

    申请日：1993-08-30

    申请人： Ronald L. Dechene ,  Thomas B. Smith ,  David R. Day ,  Christian I. Tanzer ,  Scott A. Marino ,  Ronald J. Tache ,  Ajoy K. Roy

    发明人： Ronald L. Dechene ,  Thomas B. Smith ,  David R. Day ,  Christian I. Tanzer ,  Scott A. Marino ,  Ronald J. Tache ,  Ajoy K. Roy

    IPC分类号： G01N24/08 ,  G01R33/31 ,  G01R33/32 ,  G01R33/36 ,  G01R33/44 ,  G01R33/563 ,  G01R33/20

    CPC分类号： G01N24/085 ,  G01R33/31 ,  G01R33/563

    摘要： A pulsed nmr analysis system for polymers materials extracted from industrial processes at a mobility enhancing temperature (at or above glass transition temperature for amorphous polymers, at the crystalline transition temperature for crystalline and semi-crystalline polymers). The sample is measured via nmr techniques and results correlated to viscosity and melt index or melt flow (which are related to average molecular weights). The nmr system (in or out of resonance) includes: sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C), from which components functions are determined using linear or non-linear regression techniques to correlate the curve components to the target nuclei and to flow rates in plastics. Substantial improvement of correlation of nmr derived constants and equations of a free induction decay curve with the foregoing polymer properties is obtained via (1) conducting the nmr process at a mobility enhancing temperature (normally elevated compared to the industrial process temperature of the industrial process) and (2) holding temperature substantially constant at such elevated temperature.

    摘要翻译： 用于在工业过程中以迁移率增强温度（对于无定形聚合物的玻璃化转变温度以上，在结晶和半结晶聚合物的结晶转变温度下）提取的聚合物材料的脉冲nmr分析系统。 样品通过nmr技术测量，结果与粘度和熔体指数或熔体流动相关（与平均分子量相关）。 nmr系统（进出谐振）包括：采样吞吐系统（P，LI，V1，V2）和用户系统控制（104）建立数字化的自由感应衰减曲线（C），从中可以使用线性 或非线性回归技术来将曲线分量与目标核相关联，并使塑料中的流速相关。 通过（1）以迁移率提高温度（与工业过程的工业过程温度相比通常升高）进行nmr工艺，获得具有上述聚合物性质的自由诱导衰变曲线的nmr导出常数和方程的相关性的显着改善， 和（2）在这种升高的温度下保持温度基本恒定。

    On-line mass flow measurement in flowing two component systems
    2.
    发明授权
    On-line mass flow measurement in flowing two component systems 失效
    流动双组分系统中的在线质量流量测量

    公开(公告)号：US5396806A

    公开(公告)日：1995-03-14

    申请号：US150961

    申请日：1993-11-12

    申请人： Ronald L. Dechene ,  David R. Day ,  Thomas B. Smith

    发明人： Ronald L. Dechene ,  David R. Day ,  Thomas B. Smith

    IPC分类号： B01J8/00 ,  G01F1/64 ,  G01F1/708 ,  G01F1/712 ,  G01F1/74 ,  G01N27/22

    CPC分类号： G01N27/221 ,  B01J8/001 ,  B01J8/0015 ,  G01F1/64 ,  G01F1/7088 ,  G01F1/712 ,  G01F1/74

    摘要： Apparatus and process for measuring mass flow of a slurry mixture of two components of materials, such as a flow of catalyst solid particles (the first component) or droplets in a fluid carrier (the second component). The slurry mixture is added to a process stream (10) or batch reactor. The flow velocity and the volume fraction of one component are measured and combined with the known specific gravity, of the component being measured, and the physical dimensions of the pipe, in which the slurry mixture is flowing, to determine the mass flow of the component. The flow velocity is measured by correlating signals at two separated locations along the flow path, and the volume fraction is measured by combining the known dielectric constants of each of the materials in the mixture and the measured capacitance of the mixture. The capacitance is measured from electrodes which may be isolated from the flowing materials in some applications, but not isolated from the flowing materials in other applications. The temperature (9) and pressure (11) are compensated in the final calculation, and the mass flow result is used to control, via feedback, the amount of such materials delivered. Also, a subtraction technique to remove interfering power line noise is implemented to improve sensitivity.

    摘要翻译： 用于测量材料的两种组分的浆料混合物的质量流量的装置和方法，例如流体载体（第二组分）中的催化剂固体颗粒（第一组分）或液滴的流动。 将浆料混合物加入到工艺流（10）或间歇式反应器中。 测量一个组分的流速和体积分数，并与所测量的组分的已知比重和浆料混合物流动的管的物理尺寸相结合以确定组分的质量流量 。 通过在沿着流动路径的两个分开的位置处相关联信号来测量流速，并且通过组合混合物中每种材料的已知介电常数和混合物的测量电容来测量体积分数。 从一些应用中可以从流动材料中分离的电极测量电容，但在其它应用中不与流动材料隔离。 在最终计算中补偿温度（9）和压力（11），质量流量结果用于通过反馈控制所输送的材料的数量。 此外，实施用于消除干扰电力线噪声的减法技术来提高灵敏度。

    Magnetic resonance analysis in real time, industrial usage mode
    4.
    发明授权
    Magnetic resonance analysis in real time, industrial usage mode 失效
    实时磁共振分析，工业使用模式

    公开(公告)号：US5049819A

    公开(公告)日：1991-09-17

    申请号：US573639

    申请日：1990-08-27

    申请人： Ronald L. Dechene ,  Thomas B. Smith ,  Ajoy Roy

    发明人： Ronald L. Dechene ,  Thomas B. Smith ,  Ajoy Roy

    IPC分类号： G01R33/31 ,  G01R33/44

    CPC分类号： G01R33/31 ,  G01N24/085

    摘要： Pulsed NMR system for industrial purposes comprising sample throughput system (P, LI, V1, V2) magnetic field adjustment (120, 124) and thermal adjustment (134-138 and 142-146). The resonance is established by a coil (100), excited by a transceiver (104) and interacting with the sample and the magnetic field at resonance to establish received and digitized free induction decay curve forms (C) which are automatically analyzed into Gaussian and exponential components--providing simplified high speed computation means with repetitive test sequence and thermal controls that systematically minimize errors to assure reliable determination of target nuclei quantities in successive samples from an industrial process and utilizing Hahn spin echo based equipment to automatically adjust the analysis of one or more of the analyzed components.

    摘要翻译： 用于工业目的的脉冲NMR系统包括样品通量系统（P，LI，V1，V2）磁场调节（120,124）和热调节（134-138和142-146）。 谐振由线圈（100）建立，由收发器（104）激发，并与样本和谐振频率相互作用以建立接收和数字化的自由感应衰减曲线形式（C），其自动分析成高斯和指数 组件 - 提供简单的高速计算装置，具有重复的测试序列和热控制，系统地最小化误差，以确保来自工业过程的连续样品中的目标核数量的可靠确定，并利用基于Hahn自旋回波的设备自动调整一个或多个 的分析组件。