METHOD FOR PREPARING ACROLEIN FROM GLYCEROL OR GLYCERINE
    1.
    发明申请
    METHOD FOR PREPARING ACROLEIN FROM GLYCEROL OR GLYCERINE 审中-公开
    从甘油或甘油制备丙烯酸的方法

    公开(公告)号:US20110288323A1

    公开(公告)日:2011-11-24

    申请号:US13140109

    申请日:2009-12-16

    摘要: The invention relates to a method for preparing acrolein from glycerol or glycerine, comprising dehydrating glycerol or glycerine in the presence of a catalyst consisting of at least a) a mixed oxide of zirconium and at least one metal, said metal being selected from niobium, tantalum and vanadium, b) a zirconium oxide and at least one metal oxide, the metal being selected from niobium, tantalum and vanadium, c) a silicon oxide and a mixed oxide of zirconium and at least one metal, the metal being selected from tungsten, cerium, manganese, niobium, tantalum, titanium, vanadium and silicon, d) a silicon oxide and a mixed oxide of zirconium and at least one metal, the metal being selected from tungsten, cerium, manganese, niobium, tantalum, vanadium and titanium, e) a titanium oxide and a mixed oxide of zirconium and at least one metal, said metal being selected from tungsten, cerium, manganese, niobium, tantalum, titanium, vanadium and silicon, f) a titanium oxide and a mixed oxide or zirconium and at least one metal, said metal being selected from tungsten, cerium, manganese, niobium, tantalum, titanium, vanadium and silicon. The method can be used for producing -3-(methylthio)propionic (MMP) aldehyde, 2-hydroxy-4-methylthiobutyronitrile (HMTBN), methionine and analogues thereof from acrolein.

    摘要翻译: 本发明涉及一种由甘油或甘油制备丙烯醛的方法,包括在由至少一种锆和至少一种金属的混合氧化物组成的催化剂存在下使甘油或甘油脱水,所述金属选自铌,钽 和钒,b)氧化锆和至少一种金属氧化物,所述金属选自铌,钽和钒,c)氧化硅和锆与至少一种金属的混合氧化物,所述金属选自钨, 铈,锰,铌,钽,钛,钒和硅,d)氧化锆和锆与至少一种金属的混合氧化物,所述金属选自钨,铈,锰,铌,钽,钒和钛, e)氧化钛和锆与至少一种金属的混合氧化物,所述金属选自钨,铈,锰,铌,钽,钛,钒和硅,f)氧化钛和混合氧化物或z 所述金属选自钨,铈,锰,铌,钽,钛,钒和硅。 该方法可用于由丙烯醛生产3-(甲硫基)丙酸(MMP)醛,2-羟基-4-甲基硫代丁腈(HMTBN),甲硫氨酸及其类似物。

    Remote node maintenance and management method and system in
communication networks using multiprotocol agents
    9.
    发明授权
    Remote node maintenance and management method and system in communication networks using multiprotocol agents 失效
    使用多协议代理的通信网络中的远程节点维护和管理方法和系统

    公开(公告)号:US5961594A

    公开(公告)日:1999-10-05

    申请号:US806184

    申请日:1997-02-25

    IPC分类号: H04L12/24 H04L29/06 G06F13/00

    摘要: A system and method for remotely accessing communication network nodes and for monitoring each type of resource within such nodes in a fast, reliable and efficient manner. The system components are a web browser as user interface, a web server for generating and transmitting commands to the destination node using the Common Gateway Interface (CGI) of the web server and a dedicated multiprotocol agent hosted in each node communicating with the web server by means of an appropriate protocol.

    摘要翻译: 一种用于远程访问通信网络节点并以快速,可靠和有效的方式监视这些节点内的每种类型的资源的系统和方法。 系统组件是作为用户界面的网络浏览器,用于使用web服务器的公共网关接口(CGI)生成和传送命令到目的地节点的web服务器,以及托管在每个节点中的专用多协议代理,所述专用多协议代理通过 手段适当的协议。

    Device for controlling the enqueuing and dequeuing operations of
messages in a memory
    10.
    发明授权
    Device for controlling the enqueuing and dequeuing operations of messages in a memory 失效
    用于控制存储器中的消息的发送和发送操作的设备

    公开(公告)号:US5214783A

    公开(公告)日:1993-05-25

    申请号:US564900

    申请日:1990-08-09

    摘要: The subject device manages the access to message queues in a memory (6) by an enqueuer 2 and a dequeuer 7 when the enqueuer has priority over the dequeuer. It solves the contention problem raised when the dequeuer dequeues the last message from a queue while the enqueuer is enqueuing anew one. A queue control block QCB and queue status bits E, A, D are assigned to each queue and stored in memories 20 and 22. Each time dequeuer 7 performs a dequeuing operation it sets its D bit (dequeuer active) before updating the queue head field in the QCB block. When the enqueuer performs an enqueuing operation it sets an abort bit A, if it finds the D bit active and E bit active indicating that the queue contains at least one message to warn the dequeuer that it has to abort its process if it is dequeuing the last message from the queue.