On-line control of a chemical process plant
    12.
    发明授权
    On-line control of a chemical process plant 失效
    在线控制化工厂

    公开(公告)号:US6072576A

    公开(公告)日:2000-06-06

    申请号:US986971

    申请日:1997-12-08

    摘要: A process plant for the manufacture of halobutyl rubber is provided with online monitoring and control of the process parameters to control the properties of the product. It incorporates an in-situ measurement system that does not require the removal of any sample material from the process. It uses a Fourier Transform Near Infrared (FTNIR) spectrometer, fiber-optic cables, a viscometer for measuring solution viscosity and a Resistance Temperature Device (RTD) for temperature measurement. An online real-time analyzer system using a Constrained Principal Spectral Analysis program predicts the property of the polymer product and provides the process control system with analysis of the data using derived relationships between the physical properties of the polymer and these spectral measurements and the measured values of fluid viscosity and temperature. Differences between the predicted and desired property of the product are used to control process parameters. The method can be used for a variety of chemical process plants.

    摘要翻译: 提供了一种用于制造卤代丁基橡胶的工艺设备,用于在线监测和控制工艺参数以控制产品的性能。 它结合了现场测量系统,不需要从过程中去除任何样品材料。 它使用傅里叶变换近红外(FTNIR)光谱仪,光纤电缆,用于测量溶液粘度的粘度计和用于温度测量的电阻温度装置(RTD)。 使用约束主谱分析程序的在线实时分析仪系统预测聚合物产品的性质,并使用衍生的聚合物物理性能与这些光谱测量值和测量值之间的关系为数据分析提供过程控制系统 的流体粘度和温度。 使用产品的预测和所需属性之间的差异来控制过程参数。 该方法可用于各种化学工艺装置。

    Method for Reducing Depositions in Polymerization Vessels
    14.
    发明申请
    Method for Reducing Depositions in Polymerization Vessels 审中-公开
    降低聚合容器沉积的方法

    公开(公告)号:US20090062496A1

    公开(公告)日:2009-03-05

    申请号:US12179368

    申请日:2008-07-24

    IPC分类号: C08F210/00 B01J19/00

    摘要: Provided is a method for reducing depositions in polymerization vessels, where the method includes the steps of providing a reaction vessel having polymerization contact surfaces, polishing a majority of the polymerization contact surfaces to have an average percent excess surface areas (SAxs) of 2% or less, introducing a catalyst system and at least one monomer or comonomer mixture in the reaction vessel, and polymerizing the at least one monomer or comonomer mixture. The catalyst may be soluble in the diluent used for polymerization. The method may be useful for low temperature polymerization systems.

    摘要翻译: 提供了一种用于减少聚合容器中的沉积的方法,其中该方法包括提供具有聚合接触表面的反应容器的步骤,抛光大部分聚合接触表面以具有2%的平均百分比过剩表面积(SAxs)或2% 在反应容器中引入催化剂体系和至少一种单体或共聚单体混合物,并聚合至少一种单体或共聚单体混合物。 催化剂可溶于用于聚合的稀释剂中。 该方法可用于低温聚合体系。

    Method for Reducing Depositions in Polymerization Vessels
    17.
    发明申请
    Method for Reducing Depositions in Polymerization Vessels 有权
    降低聚合容器沉积的方法

    公开(公告)号:US20090062484A1

    公开(公告)日:2009-03-05

    申请号:US12179375

    申请日:2008-07-24

    IPC分类号: C08F2/01

    摘要: The method of polymerization includes the steps of a) providing a catalyst system, b) providing at least one monomer or comonomer mixture in a reaction vessel, c) introducing the catalyst into the reaction vessel, and d) polymerizing the at least one monomer or comonomer mixture to produce an isoolefin polymer. The catalyst may be soluble in the diluent used for polymerization. The polymerization contact surfaces of the reaction vessel have an arithmetic average surface roughness of less than 0.3 μm (12 microinches).

    摘要翻译: 聚合方法包括以下步骤:a)提供催化剂体系,b)在反应容器中提供至少一种单体或共聚单体混合物,c)将催化剂引入反应容器中,和d)聚合至少一种单体或 共聚单体混合物以产生异烯烃聚合物。 催化剂可溶于用于聚合的稀释剂中。 反应容器的聚合接触表面的算术平均表面粗糙度小于0.3μm(12微英寸)。

    Process to produce a hydrocarbon rubber cement utilizing a hydrofluorocarbon diluent
    19.
    发明申请
    Process to produce a hydrocarbon rubber cement utilizing a hydrofluorocarbon diluent 有权
    使用氢氟烃稀释剂生产烃橡胶水泥的方法

    公开(公告)号:US20070299190A1

    公开(公告)日:2007-12-27

    申请号:US11473732

    申请日:2006-06-23

    IPC分类号: C08K5/01

    摘要: Provided for herein is a process to produce an essentially homogeneous single liquid phase hydrocarbon-rubber cement from a polymer slurry comprising a hydrocarbon-rubber, a diluent, and unreacted monomer(s), the process comprising: (a) contacting the polymer slurry with a hydrocarbon solvent; and (b) removing the diluent in amounts not sufficiently more than is necessary to produce the essentially homogeneous single liquid phase hydrocarbon-rubber cement wherein the mass fraction of monomer(s) in the hydrocarbon-rubber cement, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber cement, is less than the mass fraction of monomer(s) in the hydrocarbon-rubber slurry, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber slurry, wherein the diluent comprises a hydrofluorocarbon.

    摘要翻译: 本文提供了一种从包含烃橡胶,稀释剂和未反应单体的聚合物浆料制备基本均匀的单液相烃 - 橡胶胶泥的方法,该方法包括:(a)使聚合物浆料与 烃溶剂; 和(b)以不足于制备基本上均匀的单液相烃橡胶胶浆所需量的量除去稀释剂,其中基于烃总量的烃 - 橡胶胶浆中单体的质量分数 存在于烃 - 橡胶胶浆中的橡胶基于烃 - 橡胶浆料中存在的烃 - 橡胶的总量小于烃 - 橡胶浆料中单体的质量分数,其中稀释剂包含 氢氟碳化合物。

    Mutual exclusion at the record level with priority inheritance for embedded systems using one semaphore
    20.
    发明授权
    Mutual exclusion at the record level with priority inheritance for embedded systems using one semaphore 有权
    在使用一个信号量的嵌入式系统的优先级继承方面,在记录级别进行相互排斥

    公开(公告)号:US06560627B1

    公开(公告)日:2003-05-06

    申请号:US09239499

    申请日:1999-01-28

    IPC分类号: G06F900

    CPC分类号: G06F9/52

    摘要: A method for providing mutual exclusion at a single data element level for use in embedded systems. Entries for tasks that are currently holding a resource are stored in a hold list. Entries for tasks that are not currently executing and are waiting to be freed are stored in a wait list. A single mutual exclusion semaphore flags any request to access a resource.

    摘要翻译: 一种用于在单个数据元素级别提供互斥以在嵌入式系统中使用的方法。 当前持有资源的任务的条目存储在保留列表中。 当前正在执行并正在等待被释放的任务的条目存储在等待列表中。 单个互斥信号标志着任何访问资源的请求。