얀 제조 방법 및 장치
    5.
    发明公开
    얀 제조 방법 및 장치 有权
    生产纱线的工艺和装置

    公开(公告)号:KR1020090082406A

    公开(公告)日:2009-07-30

    申请号:KR1020097010184

    申请日:2007-10-30

    CPC classification number: D01D5/06 B29C47/0014 B29C47/8895 D01F6/605 D01F6/74

    Abstract: The present invention concerns a process and apparatus for spinning polymer filaments comprising extruding a polymer solution to form one or more filaments into an air gap above a coagulation liquid, where the filaments are subject to strain; forming a downward stream of liquid and filaments by contacting the polymer solution with a coagulation liquid; passing the filaments and liquid through a quench tube; contacting the liquid with a surface such that the downward force of gravity on the liquid does not increase the strain of the filaments in the air gap; and separating the liquid from the filaments.

    Abstract translation: 本发明涉及一种用于纺丝聚合物长丝的方法和装置,包括挤出聚合物溶液以形成一个或多个长丝进入凝结液上方的空气间隙,其中细丝经受应变; 通过使聚合物溶液与凝固液接触而形成液体和细丝的向下流; 使细丝和液体通过淬火管; 使液体与表面接触,使得液体上的向下的重力不会增加气隙中长丝的应变; 并将液体与细丝分离。

    2가페놀류의 디카르복시화방법
    8.
    发明授权
    2가페놀류의 디카르복시화방법 失效
    2가의의디카르복시화방법

    公开(公告)号:KR100411682B1

    公开(公告)日:2004-04-03

    申请号:KR1019980702417

    申请日:1996-10-21

    CPC classification number: C07C51/15 C07C65/05

    Abstract: A process is disclosed for dicarboxylating dihydric phenols, notably those where the hydroxyl groups are in the para or the ortho position vis-+E,gra a+EE -vis one another. More particularly, the invention pertains to a process for preparing 2,5-dihydroxyterephthalic acid (2,5 DHTA). The invention comprises contacting a dihydric phenol with carbon dioxide in the presence of an alkali metal carbonate, the reaction being carried out in the presence of an alkali metal formate, at a temperature above the formate's melting point. The invention has several advantages over the well-known Kolbe-Schmitt reaction and other known carboxylation reactions, such as a lower operating pressure, higher yields, and/or shorter reaction times.

    Abstract translation: 公开了使二羟基酚二羧酸化的方法,特别是那些羟基处于对位或邻位的化合物,相互间形成一个+ E-EE。 更具体地说,本发明涉及制备2,5-二羟基对苯二甲酸(2,5 DHTA)的方法。 本发明包括使二元酚与二氧化碳在碱金属碳酸盐存在下接触,该反应在甲酸碱金属熔点以上的温度下在碱金属甲酸盐存在下进行。 本发明与众所周知的Kolbe-Schmitt反应和其他已知的羧化反应(例如较低的操作压力,较高的产率和/或较短的反应时间)相比具有几个优点。

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