Method for producing (meth) acrylic acid

    公开(公告)号:US20050192464A1

    公开(公告)日:2005-09-01

    申请号:US11061019

    申请日:2005-02-18

    IPC分类号: C07C51/43 C07C51/42 C07C51/48

    CPC分类号: C07C51/48 C07C57/04

    摘要: The present invention relates to a method for producing (meth)acrylic acid comprising a process of recovering (meth)acrylic acid as an aqueous (meth)acrylic acid from a (meth)acrylic acid-containing gas mixture produced by the catalytic gas phase oxidation of at least one reactant selected from the group consisting of propane, propylene, isobutylene and (meth)acrolein, and a system usable for the method. The recovery process comprises the steps of: (1) feeding the (meth)acrylic acid-containing gas mixture into a quenching tower and condensing it in the quenching tower so as to recover an aqueous (meth)acrylic acid solution from the bottom of the quenching tower, in which some of the recovered aqueous solution of (meth)acrylic acid is recycled to the top part of the quenching tower so as to condense the (meth)acrylic acid-containing gas mixture; (2) passing the uncondensed part of the (meth)acrylic acid-containing gas mixture from the quenching tower through the top of the quenching tower to an absorption column; (3) absorbing (meth)acrylic acid contained in the uncondensed part of the (meth)acrylic acid-containing gas mixture in the absorption column with a absorption solvent; (4) feeding the (meth)acrylic acid solution resulting from the absorption in the step (3) to a desorption column; and (5) separating the solvent used in the step (3) from the (meth)acrylic acid solution in the desorption column, so that the substance from which the solvent has been removed in the desorption column is fed to the quenching tower, and the separated solvent is recycled to the absorption column. The inventive method is an efficient and economic method which allows a reduction in energy consumption in subsequent purification processes by maximizing the concentration of an aqueous solution of (meth)acrylic solution recovered at the bottom of the quenching tower and minimizing the concentration of (meth)acrylic acid lost from the vent gas of the absorption column.

    Temperature measuring device
    2.
    发明申请

    公开(公告)号:US20060284723A1

    公开(公告)日:2006-12-21

    申请号:US11453117

    申请日:2006-06-14

    IPC分类号: H01C3/04

    CPC分类号: G01K3/14 G01K1/14 G01K7/02

    摘要: Disclosed is a temperature measuring device. The temperature measuring device includes: a thermo-well tube; and a cable or wire type temperature measuring means which is installed in a thermo-well tube, wherein temperature measuring means has temperature detecting sensors disposed at an intermediate portion thereof, and the temperature detecting sensors can be moved axially in the thermo-well tube by applying tension to both ends of the cable or wire type temperature measuring means. The present invention also provides a reaction tube in which the temperature measuring device is disposed axially, and a reactor including at least one temperature measuring device or reaction tube as described above.

    Method of producing styren polymers using high speed catalytic dispersion technology
    3.
    发明申请
    Method of producing styren polymers using high speed catalytic dispersion technology 失效
    使用高速催化分散技术生产苯乙烯聚合物的方法

    公开(公告)号:US20060247398A1

    公开(公告)日:2006-11-02

    申请号:US11396763

    申请日:2006-04-03

    IPC分类号: C08F4/44

    摘要: Provided is a method of preparing styrene polymers, the method comprising: homogeneously mixing a styrene monomer; a cocatalyst mixture of Group 13 metal-containing organic metal compound cocatalyst and an inert organic solvent; and a catalyst mixture of a metallocene catalyst and the inert organic solvent using a high speed homogenizing mixer to obtain a homogenized mixture; and providing the homogenized mixture to a reactor to initiate polymerization. In this method, catalyst is quickly dispersed among monomers using a high speed homogenizing mixer so that formation of gel, which occurs when a syndiotactic styrene polymer is produced, can be fundamentally prevented. In addition, a styrene polymer prepared using the method has high activity, good stereoregularity, and uniform molecular distribution.

    摘要翻译: 提供一种制备苯乙烯聚合物的方法,该方法包括:均匀混合苯乙烯单体; 含13族金属的有机金属化合物助催化剂和惰性有机溶剂的助催化剂混合物; 和茂金属催化剂和惰性有机溶剂的催化剂混合物,使用高速匀浆混合机得到均质混合物; 并将均匀的混合物提供到反应器以引发聚合。 在该方法中,使用高速匀浆混合器将催化剂快速分散在单体中,从而可以从根本上防止在产生间规苯乙烯聚合物时发生凝胶的形成。 此外,使用该方法制备的苯乙烯聚合物具有高活性,良好的立构规整性和均匀的分子分布。

    Method and apparatus for providing security mechanism guaranteeing transparency at transport layer

    公开(公告)号:US20060095758A1

    公开(公告)日:2006-05-04

    申请号:US11103510

    申请日:2005-04-12

    IPC分类号: H04L9/00

    CPC分类号: H04L63/04 H04L63/061

    摘要: Provided are a method and apparatus for providing a security mechanism guaranteeing transparency at a transport layer. The method includes: receiving a data packet from an application program, and searching key information corresponding to the data packet in key information database; determining whether to request a key exchange module of an application layer for a new key negotiation according to a result obtained by searching key information; and performing encrypting/decrypting based on key information when the key exchange module stores key negotiation information obtained by the new key negotiation in a kernel. The apparatus encrypts/decrypts the data packet at the transport layer of the kernel, thereby providing the application program with security transparency, effectively controlling and making it easily expansible.

    Microwave tunable device having coplanar waveguide structure
    6.
    发明申请
    Microwave tunable device having coplanar waveguide structure 审中-公开
    具有共面波导结构的微波可调谐器件

    公开(公告)号:US20050116792A1

    公开(公告)日:2005-06-02

    申请号:US10817822

    申请日:2004-04-06

    CPC分类号: H01P3/003 H01P1/181

    摘要: Provided is a microwave tunable device having a coplanar waveguide structure, comprising a substrate, a ferroelectric/paraelectric thin film, a first transmission line, and second transmission lines, wherein a transmission line portion is formed with a constant width and an input/output portion is formed with a width larger than that of the transmission line portion in the first transmission line, and a transmission line portion is formed with a constant width and an input/output portion is formed with a narrower width than that of the transmission line portion in the second transmission line, whereby it is possible to minimize impedance difference with a connection line, a reflection loss, and an insertion loss, by controlling the width of the first transmission line and gap between the first and the second transmission lines, in the input/output portion.

    摘要翻译: 本发明提供一种具有共面波导结构的微波可调谐装置,包括基板,铁电/顺电薄膜,第一传输线和第二传输线,其中传输线部分形成为恒定宽度,输入/输出部分 形成为具有比第一传输线中的传输线部分的宽度大的宽度,并且传输线部分形成为具有恒定的宽度,并且输入/输出部分形成为具有比传输线部分的宽度更窄的宽度 第二传输线,通过在输入端控制第一传输线的宽度和第一和第二传输线之间的间隙,可以使与连接线的阻抗差,反射损耗和插入损耗最小化 /输出部分。

    Backlight assembly of liquid crystal display
    7.
    发明申请
    Backlight assembly of liquid crystal display 审中-公开
    背光组件的液晶显示

    公开(公告)号:US20050099822A1

    公开(公告)日:2005-05-12

    申请号:US10949223

    申请日:2004-09-27

    摘要: A backlight assembly of a liquid crystal display is provided. The backlight assembly of a liquid crystal display include a lamp for generating light; a light guide plate disposed at a side of the lamp to guide the light; a diffusion sheet disposed on the light guide plate to scatter the light that is incident from the light guide plate, thereby making brightness distribution of light uniform; and a prism sheet including a body part into which a light diffused from the diffusion sheet is introduced and a plurality of protrusion parts arranged in a specific direction, in which each protrusion part is shaped in a scalene triangle prism form and has both base angles different from each other.

    摘要翻译: 提供了一种液晶显示器的背光组件。 液晶显示器的背光组件包括用于产生光的灯; 导光板,其设置在所述灯的侧面以引导所述光; 漫射片,设置在导光板上以散射从导光板入射的光,从而使光的亮度分布均匀; 以及棱镜片,其包括从扩散片扩散的光引入的主体部分和沿特定方向布置的多个突起部,其中每个突出部分以斜角三角形棱镜形状成形,并且具有两个基本角度不同 从彼此。

    Security router system and method of authenticating user who connects to the system
    8.
    发明申请
    Security router system and method of authenticating user who connects to the system 审中-公开
    安全路由器系统和连接系统认证用户的方法

    公开(公告)号:US20060101261A1

    公开(公告)日:2006-05-11

    申请号:US11220887

    申请日:2005-09-07

    IPC分类号: H04L9/00

    摘要: Provided are a security router system for a network and a method of authenticating a user who connects to the system. The security routing system includes: a plurality of physical link ports inputting/outputting packets; a physical layer matching unit transmitting/receiving packets to the physical link ports and generating a media access control (MAC) frame; and a network processor including routing processing means that establishes a transport route for input packets via the physical layer matching unit and processes routing protocols, packet forwarding means that forward the input packets to their destinations, intrusion detection means that classify the input packets based on a packet classification standard and determine whether the input packets are attacks from outside, and user authentication means that determine whether a user is authorized to connect to a router, thereby reducing expenses required to build a network while maintaining security in comparison with a conventional firewall or intrusion detection system, and increasing reliability and safety of the network by preventing harmful traffic since each router performs a network security function.

    摘要翻译: 提供了一种用于网络的安全路由器系统和用于认证连接到系统的用户的方法。 安全路由系统包括:多个物理链路端口输入/输出分组; 物理层匹配单元向物理链路端口发送/接收分组并生成媒体接入控制(MAC)帧; 以及网络处理器,包括经由所述物理层匹配单元建立用于输入分组的传输路由并处理路由协议的路由处理装置,将所述输入分组转发到其目的地的分组转发装置,基于所述输入分组对所述输入分组进行分类的入侵检测装置 分组分类标准,并确定输入分组是否是外部的攻击,用户认证意味着确定用户是否被授权连接到路由器,从而与常规防火墙或入侵相比,降低了构建网络所需的开销,同时保持了安全性 检测系统,以及由于每个路由器执行网络安全功能,防止有害的流量,从而提高网络的可靠性和安全性。

    Backlight assembly of liquid crystal display
    9.
    发明申请
    Backlight assembly of liquid crystal display 审中-公开
    背光组件的液晶显示

    公开(公告)号:US20060087743A1

    公开(公告)日:2006-04-27

    申请号:US11185021

    申请日:2005-07-20

    IPC分类号: G02B27/10

    摘要: A backlight assembly of a liquid crystal display is provided. The backlight assembly of a liquid crystal display include a lamp for generating light; a light guide plate disposed at a side of the lamp to guide the light; a diffusion sheet disposed on the light guide plate to scatter the light that is incident from the light guide plate, thereby making brightness distribution of light uniform; and a prism sheet including a body part into which a light diffused from the diffusion sheet is introduced and a plurality of protrusion parts arranged in a specific direction, in which each protrusion part is shaped in a scalene triangle prism form and has both base angles different from each other.

    摘要翻译: 提供了一种液晶显示器的背光组件。 液晶显示器的背光组件包括用于产生光的灯; 导光板,其设置在所述灯的侧面以引导所述光; 漫射片,设置在导光板上以散射从导光板入射的光,从而使光的亮度分布均匀; 以及棱镜片,其包括从扩散片扩散的光引入的主体部分和沿特定方向布置的多个突起部,其中每个突出部分以斜角三角形棱镜形状成形,并且具有两个基本角度不同 从彼此。

    Apparatus and method for computing SHA-1hash function
    10.
    发明申请
    Apparatus and method for computing SHA-1hash function 失效
    用于计算SHA-1hash函数的装置和方法

    公开(公告)号:US20050144204A1

    公开(公告)日:2005-06-30

    申请号:US10917685

    申请日:2004-08-12

    IPC分类号: G06F7/06 G06F7/00 H04L9/32

    CPC分类号: H04L9/0643

    摘要: An apparatus and method for computing a SHA-1 hash function value are provided. The apparatus includes a first register unit including a plurality of registers that store a first bit string of predetermined lengths for generation of a hash function value; a second register unit storing input data in units of second bit strings with predetermined lengths, and sequentially outputting the second bit strings; a third register unit performing an operation on the first bit string of the plurality of registers and the second bit strings output from the second register unit so as to generate and store a third bit string, and updating first-bit string of the plurality of registers based on the third bit string; and an adding unit combining the first bit string stored in the first register unit, the first bit string of the third bit string stored in the third register unit, and the original initial values stored in the first register unit so as to obtain a hash function value. Accordingly, it is possible to reduce the size of the apparatus and stably compute a hash function value at a high speed.

    摘要翻译: 提供了一种用于计算SHA-1散列函数值的装置和方法。 该装置包括:第一寄存器单元,包括多个寄存器,用于存储用于生成散列函数值的预定长度的第一位串; 第二寄存器单元,以预定长度的第二位串为单位存储输入数据,并顺序地输出第二位串; 第三寄存器单元,对所述多个寄存器中的第一位串执行操作,以及从所述第二寄存器单元输出的所述第二位串,以产生和存储第三位串,并且更新所述多个寄存器中的第一位串 基于第三位串; 以及添加单元,组合存储在第一寄存器单元中的第一位串,存储在第三寄存器单元中的第三位串的第一位串和存储在第一寄存器单元中的原始初始值,以获得散列函数 值。 因此,可以减小装置的尺寸并且可以高速稳定地计算散列函数值。