公开(公告)号：US08426531B2

公开(公告)日：2013-04-23

申请号：US13254062

申请日：2010-02-24

申请人： Jean P. Chauvel, Jr. ,  John O. Osby ,  Wenzel P. Bartlett ,  Serena K. Stephenson ,  John S. Hanson ,  Jeffery S. Bradley ,  Walter D. Leatherwood ,  Rajesh P. Paradkar ,  Thoi H. Ho

发明人： Jean P. Chauvel, Jr. ,  John O. Osby ,  Wenzel P. Bartlett ,  Serena K. Stephenson ,  John S. Hanson ,  Jeffery S. Bradley ,  Walter D. Leatherwood ,  Rajesh P. Paradkar ,  Thoi H. Ho

IPC分类号： C08F283/00 ,  C08F2/00 ,  C08L69/00

CPC分类号： C08G64/24 ,  C08G64/14 ,  G01N21/359 ,  G01N21/65 ,  G01N2021/8411

摘要： The present invention relates to an improved process for online measurement of monomer concentration, specifically bisphenol A, in an interfacial polycarbonate manufacturing process. Wherein the measurement is obtained by vibrational spectroscopy for the purpose of improving process control, specifically, controlling the carbonate polymer molecular weight.

摘要翻译： 本发明涉及在界面聚碳酸酯制造方法中在线测量单体浓度，特别是双酚A的改进方法。 其中通过振动光谱法获得测量值，以改进工艺控制，特别是控制碳酸酯聚合物分子量。

公开(公告)号：US5046854A

公开(公告)日：1991-09-10

申请号：US647179

申请日：1991-01-24

申请人： Joseph P. Weller ,  David P. Denton ,  Sandra V. Lange ,  Chester R. Norman ,  Mary A. Leugers ,  Stuart Farquharson ,  Jean P. Chauvel, Jr.

发明人： Joseph P. Weller ,  David P. Denton ,  Sandra V. Lange ,  Chester R. Norman ,  Mary A. Leugers ,  Stuart Farquharson ,  Jean P. Chauvel, Jr.

IPC分类号： G01N21/03 ,  G01N21/85

CPC分类号： G01N21/03 ,  G01N21/8507 ,  G01N21/0317

摘要： A photometric probe or a photometric cell having separate windows and a metallic probe body or cell body. The window(s) are sealed to the probe or cell body by brazed or frit seals which are less likely to leak after extended use in high temperature and/or high pressure industrial applications than probes and cells having gasket sealed windows. The windows can be made of sapphire, cubic zirconia, diamond, ruby, glass or quartz and, in the case of the probe, can be in the shape of an Attenuated Total Reflectance prism. The probe or cell body can be Kovar alloy or stainless steel.

摘要翻译： 具有独立窗口和金属探针体或细胞体的光度探测器或光度测定单元。 窗口通过钎焊或玻璃料密封件密封到探针或电池体上，这些密封件在长期使用高温和/或高压工业应用后不太可能泄漏，而不是具有垫圈密封窗口的探针和电池。 窗户可以由蓝宝石，立方氧化锆，金刚石，红宝石，玻璃或石英制成，而在探针的情况下，可以是衰减总反射棱镜的形状。 探头或电池体可以是科瓦合金或不锈钢。

公开(公告)号：US5151474A

公开(公告)日：1992-09-29

申请号：US481020

申请日：1990-02-16

申请人： Sandra V. Lange ,  David P. Denton ,  Joseph P. Weller ,  Jean P. Chauvel, Jr. ,  Stuart Farquharson ,  Harry D. Ruhl, Jr. ,  Gregory A. Winter

发明人： Sandra V. Lange ,  David P. Denton ,  Joseph P. Weller ,  Jean P. Chauvel, Jr. ,  Stuart Farquharson ,  Harry D. Ruhl, Jr. ,  Gregory A. Winter

IPC分类号： B01J19/00 ,  C08F2/06 ,  C08F10/00

CPC分类号： B01J19/0006 ,  C08F10/00 ,  C08F2400/02

摘要： A process control method for controlling a polyolefin polymerization process, such as a solution polyethylene process, which includes five steps. The first step is to flow a stream of a solvent into a polyolefin reactor, such as flowing a stream of heptane solvent into the reactor at essentially a constant rate. The second step is to add a principal monomer to the stream of solvent, such as by adding ethylene at a controllable rate to the stream of solvent. The third step is to add a co-monomer to the stream of solvent, such as by adding 1-octene at a controllable rate to the stream of solvent. The fourth step is to determine the concentration of the principal monomer and the concentration of the co-monomer in the stream of solvent by high resolution multi-wavelength vibrational spectroscopy analysis, such as by Fourier transform infrared spectroscopy system having a spectral resolution of 4 wavenumbers which analyzes at 1909 wavenumbers for ethylene, at 1829 wavenumbers for 1-octene and at 2120 wavenumbers for a reference signal. The fifth step is to control the rate of addition of the principal monomer, the rate of addition of the comonomer or preferably the rate of addition of both the principal monomer and the co-monomer according to the determination of the fourth step to obtain the desired concentration of ethylene and 1-octene in the solvent so that, for example, the density of the polyolefin product can be controlled.

摘要翻译： 用于控制聚烯烃聚合方法的过程控制方法，例如溶液聚乙烯方法，其包括五个步骤。 第一步是将溶剂流流入聚烯烃反应器中，例如以基本恒定的速率将庚烷溶剂流输入反应器。 第二步是将主要单体加入到溶剂流中，例如通过以可控速率向溶剂流中加入乙烯。 第三步是向溶剂流中加入共聚单体，例如通过以可控的速率向溶剂流中加入1-辛烯。 第四步是通过高分辨率多波长振动光谱分析来确定主要单体的浓度和溶剂流中共聚单体的浓度，例如通过具有4个波数的光谱分辨率的傅里叶变换红外光谱系统 其分析了1909年的乙烯波数，1829波数的1-辛烯和2120波数的参考信号。 第五步是根据第四步的测定来控制主要单体的加入速率，共聚单体的加入速率或优选加入主单体和共聚单体的速率以获得所需的 乙烯和1-辛烯在溶剂中的浓度使得例如可以控制聚烯烃产品的密度。