Process for preparing vinyl chloride polymer under specified vapor
pressure
    3.
    发明授权
    Process for preparing vinyl chloride polymer under specified vapor pressure 失效
    在规定蒸气压下制备氯乙烯聚合物的方法

    公开(公告)号:US5739222A

    公开(公告)日:1998-04-14

    申请号:US672448

    申请日:1996-06-28

    CPC分类号: C08F4/34 C08F14/06

    摘要: A vinyl chloride polymer is prepared through suspension polymerization of a vinyl chloride monomer in the presence of a polymerization initiator in a reactor. The reactor is charged with up to 4/5 of the overall monomer charge to initiate polymerization. Polymerization is carried out under a certain saturated vapor pressure of P1 kgf/cm.sup.2 at a preset polymerization temperature. When the internal pressure of the reactor declines to P2 kgf/cm.sup.2, the remainder of the overall monomer charge is continuously fed to the reactor so as to maintain the internal pressure within the range of (P1-.DELTA.P) wherein .DELTA.P=P1-P2 ranges from 0.1 to 2.0 kgf/cm.sup.2. A vinyl chloride polymer having a high degree of polymerization is efficiently produced while alleviating the load of heat removal.

    摘要翻译: 通过聚合引发剂在反应器中的氯乙烯单体的悬浮聚合制备氯乙烯聚合物。 向反应器中加入高达+ E,总体单体电荷的4/5 + EE以引发聚合。 在预定的聚合温度下,在一定饱和蒸气压P1kgf / cm2下进行聚合。 当反应器的内部压力下降到P2kgf / cm 2时,将总体单体进料的剩余部分连续地供给到反应器中,以将内部压力保持在(P1- DELTA P)的范围内,其中DELTA P = P1- P2的范围为0.1至2.0kgf / cm2。 有效地制造具有高聚合度的氯乙烯聚合物,同时减轻除热负荷。

    Process for producing vinyl chloride polymer
    4.
    发明授权
    Process for producing vinyl chloride polymer 失效
    制备氯乙烯聚合物的方法

    公开(公告)号:US06242562B1

    公开(公告)日:2001-06-05

    申请号:US09468951

    申请日:1999-12-22

    IPC分类号: C08F624

    CPC分类号: C08F6/003 C08L27/06

    摘要: A process for producing a vinyl chloride polymer is provided which includes the steps of: (A) suspension polymerizing vinyl chloride or a monomer mixture containing vinyl chloride, in an aqueous medium to obtain a polymer slurry; (B) stripping unreacted monomers remaining in the polymer slurry; and (C) subjecting the polymer slurry having passed through the step (B), to dehydration at a temperature of from 80° C. to 95° C., preferably within 60 minutes after the stripping. According to this process, the polymer cake obtained after the polymer slurry Is dehydrated can be made to have a greatly low water content. Hence the drying time in the drying step can be shortened to bring about an improvement in productivity and also to achieve a reduction of energy consumption in the drying step and consequently a reduction of production cost. Vinyl chloride polymer dried products having good anti-initial discoloration properties can be obtained.

    摘要翻译: 提供了一种制备氯乙烯聚合物的方法,其包括以下步骤:(A)在水性介质中将氯乙烯或含有氯乙烯的单体混合物悬浮聚合以获得聚合物浆料;(B)将未反应的单体残留在 聚合物浆料; 和(C)使通过步骤(B)的聚合物浆料在80℃至95℃的温度下脱水,优选在剥离后60分钟内脱水。 根据该方法,可以使聚合物浆料脱水后得到的聚合物饼具有极低的含水量。 因此,干燥步骤中的干燥时间可以缩短,从而实现生产率的提高,并且还能够实现干燥步骤中的能量消耗的降低,从而降低生产成本。 可以获得具有良好抗初始变色特性的氯乙烯聚合物干燥产品。

    Process for producing vinyl chloride polymer with low residual monomer
    5.
    发明授权
    Process for producing vinyl chloride polymer with low residual monomer 失效
    生产具有低残留单体的氯乙烯聚合物的方法

    公开(公告)号:US06448372B2

    公开(公告)日:2002-09-10

    申请号:US09764093

    申请日:2001-01-19

    IPC分类号: C08F624

    摘要: A process for producing a vinyl chloride polymer, including the steps of (a) subjecting a vinyl chloride monomer alone or a monomer mixture containing a vinyl chloride, to suspension polymerization in water; (b) subjecting the resultant vinyl chloride polymer slurry to stripping to remove an unreacted monomer remaining therein; and (c) dehydrating the polymer slurry having been subjected to stripping. In the polymerization step (a), the ratio of water/monomer is set in a weight ratio of from 0.80 to 1.50, and the viscosity at 20° C. of the polymer slurry to be fed to the stripping step is previously kept adjusted to 0.30 Pa·s or lower. In the stripping step (c), the residual unreacted monomer in the polymer slurry can efficiently be removed using steam in a smaller quantity, thus the vinyl chloride polymer can be produced at a high productivity.

    摘要翻译: 一种制备氯乙烯聚合物的方法,包括以下步骤:(a)使单独的氯乙烯单体或含有氯乙烯的单体混合物在水中悬浮聚合; (b)将得到的氯乙烯聚合物浆料进行汽提以除去其中残留的未反应单体; 和(c)使经过剥离的聚合物浆料脱水。 在聚合步骤(a)中,将水/单体的比例设定为0.80至1.50的重量比,并将预先进料到汽提步骤的聚合物浆料的20℃下的粘度预先保持在 0.30 Pa.s以下。 在汽提步骤(c)中,聚合物淤浆中残留的未反应单体可以用较少量的蒸汽有效地除去,从而可以高生产率生产氯乙烯聚合物。

    Process for regenerating unreacted vinyl chloride monomers recovered
    6.
    发明授权
    Process for regenerating unreacted vinyl chloride monomers recovered 有权
    回收未反应的氯乙烯单体的再生方法

    公开(公告)号:US06339132B1

    公开(公告)日:2002-01-15

    申请号:US09634643

    申请日:2000-08-08

    IPC分类号: C08F218

    摘要: A process for regenerating unreacted vinyl chloride monomers is provided which has the step of compressing by means of an compressor an unreacted vinyl chloride monomer recovered from a process of vinyl chloride polymer production; compressing the same in contact with a lubricating oil fed into the compressor. In this process, the lubricating oil contains a polymerization inhibitor. Hence, even when this lubricating oil is circulated and reused as a lubricating oil after its separation from the unreacted vinyl chloride monomer, any vinyl chloride monomer remaining in the lubricating oil can effectively be kept from polymerizing in lubricating-oil circulation lines.

    摘要翻译: 提供了一种用于再生未反应的氯乙烯单体的方法,其具有通过压缩机压缩由氯乙烯聚合物生产过程回收的未反应的氯乙烯单体的步骤; 将其压缩成与供给到压缩机中的润滑油接触。 在该方法中,润滑油含有阻聚剂。 因此,即使在将该润滑油与未反应的氯乙烯单体分离后作为润滑油循环再利用时,残留在润滑油中的任何氯乙烯单体也能够在润滑油循环管线中有效地聚合。

    STEEL SHEET FOR SOFT-NITRIDING AND METHOD FOR MANUFACTURING THE SAME
    8.
    发明申请
    STEEL SHEET FOR SOFT-NITRIDING AND METHOD FOR MANUFACTURING THE SAME 审中-公开
    用于软土的钢板及其制造方法

    公开(公告)号:US20150299830A1

    公开(公告)日:2015-10-22

    申请号:US14408662

    申请日:2012-06-27

    摘要: A steel sheet for soft-nitriding has a composition containing: C: 0.05% or more to 0.10% or less; Si: 0.5% or less; Mn: 0.7% or more to 1.5% or less; P: 0.05% or less; S: 0.01% or less; Al: 0.01% or more to 0.06% or less; Cr: 0.5% or more to 1.5% or less; Nb: 0.005% or more to 0.025% or less; and N: 0.005% or less, on a mass percent basis, such that C and Nb satisfy 0.10≦Nb/C≦0.30 (where C and Nb are respective contents of the elements (by mass %)), wherein balance comprises Fe and incidental impurities, and a microstructure that is a complex-phase microstructure containing ferrite and pearlite, and the microstructure having a ratio of a microstructure other than the ferrite and the pearlite of 1% or less, and the microstructure having a ratio of polygonal ferrite in the ferrite of less than 50%.

    摘要翻译: 软氮化钢板的组成为:C:0.05%以上且0.10%以下, Si:0.5%以下; Mn:0.7%以上至1.5%以下; P:0.05%以下; S:0.01%以下; Al:0.01%以上至0.06%以下; Cr:0.5%以上至1.5%以下; Nb:0.005%以上至0.025%以下; 和N:0.005%以下,C和Nb满足0.10≦̸ Nb / C< NlE; 0.30(其中,C和Nb分别为元素含量(质量%)),其中余量包含Fe 和杂质,以及包含铁素体和珠光体的复相组织的显微组织以及具有1%以下的铁素体和珠光体以外的组织比的微结构,以及具有多边形铁素体 在铁素体中小于50%。

    Sample stage device
    10.
    发明授权
    Sample stage device 有权
    样品台装置

    公开(公告)号:US08835872B2

    公开(公告)日:2014-09-16

    申请号:US13806989

    申请日:2011-06-23

    申请人: Takashi Kobayashi

    发明人: Takashi Kobayashi

    IPC分类号: H01J37/20

    摘要: A sample stage device (10) is so configured as to calculate ideal position information xtg(i), tg(i) per predetermined period that is unaffected by drive conditions relating to gaps (25, 26), etc., and to determine, per predetermined cycle and in real time, deviations dx(i), dy(i) between real-time measured positions x(i), y(i) by position detectors comprising laser interferometers (33, 34), etc., and ideal position information xtg(i), tg(i). In addition, it calculates, based on deviations dx(i), dy(i) thus determined, such speed command values vx(i), vy(i) for motors (27, 28) that measured values x(i), y(i) would follow ideal position information xtg(i), tg(i), and performs stable and high-speed positioning control for a sample table (11) through feedback control that controls speed in real time. Thus, with respect to a sample stage device, it is possible to provide a stable and high-speed positioning control method for a sample table, which is capable of suppressing noise caused by thermal drift and vibration, without being affected by drive conditions, such as the initial states of gaps, etc.

    摘要翻译: 样品台装置(10)被配置为计算不受与间隙(25,26)等有关的驱动条件的影响的每预定周期的理想位置信息xtg(i),tg(i) 并且实时地通过包括激光干涉仪(33,34)的位置检测器等实时测量位置x(i),y(i)之间的偏差dx(i),dy(i)和理想 位置信息xtg(i),tg(i)。 另外,根据如此确定的偏差dx(i),dy(i),计算出测量值x(i),y(i)的电动机(27,28)的速度指令值vx(i),vy (i)将遵循理想位置信息xtg(i),tg(i),并且通过实时控制速度的反馈控制对样本表(11)执行稳定和高速定位控制。 因此,对于样品台装置,可以提供一种用于样品台的稳定且高速的定位控制方法,其能够抑制由热漂移和振动引起的噪声,而不受驱动条件的影响,例如 作为差距的初始状态等