Filaments having trilobal or quadrilobal cross-sections
    1.
    发明授权
    Filaments having trilobal or quadrilobal cross-sections 失效
    具有三边形或四边形交叉部分的线条

    公开(公告)号:US5057368A

    公开(公告)日:1991-10-15

    申请号:US454209

    申请日:1989-12-21

    IPC分类号: D01D5/253

    摘要: A trilobal or quadrilobal fiber formed from thermoplastic polymers, said fiber having a cross-section comprised of a central core having three or four T-shaped lobes, the legs of each intersecting at the center of said core such that the angle between the legs of adjacent lobes is from about 80.degree. to about 130.degree..

    摘要翻译: 由热塑性聚合物形成的三叶形或四边形纤维,所述纤维具有横截面,该横截面由具有三个或四个T形裂片的中心芯构成,其中每个与所述芯的中心相交的腿相互交叉, 相邻的叶片约为80°至130°。

    Recovery of copper from copper sulfide ores containing copper and iron
    3.
    发明授权
    Recovery of copper from copper sulfide ores containing copper and iron 失效
    从含铜和铁的硫化铜矿中回收铜

    公开(公告)号:US4003740A

    公开(公告)日:1977-01-18

    申请号:US646807

    申请日:1976-01-06

    IPC分类号: C22B15/00 C22B15/08

    摘要: The invention provides a cyclic process for recovering copper from sulfide ores containing copper and iron which comprises reacting the sulfide ore with sulfur dioxide gas at a temperature of at least about 500.degree. C. to form elemental sulfur, removing the elemental sulfur, reacting the residual solids with concentrated sulfuric acid at a temperature of about 180.degree. to 500.degree. C. to form copper sulfate and sulfur dioxide gas, recycling the sulfur dioxide gas for reaction with additional ore, roasting the remaining solids at a temperature of about 400.degree. C. to 900.degree. C., leaching the roasted solids with an aqueous solution to solubilize the copper sulfate and recovering copper from the solubilized copper sulfate. In another embodiment of the invention, the roasting step is eliminated by removing magnetite from the solids remaining after removal of the elemental sulfur.

    摘要翻译: 本发明提供一种循环方法,用于从含有铜和铁的硫化矿中回收铜,该方法包括在至少约500℃的温度下使硫化矿与二氧化硫气体反应,形成元素硫,除去元素硫, 用浓硫酸在约180℃至500℃±20℃的温度下固体固体,形成硫酸铜和二氧化硫气体,再循环二氧化硫气体与另外的矿石反应,在约400℃的温度下焙烧剩余的固体 ℃至900℃,用水溶液浸提焙烧固体,溶解硫酸铜并从溶解的硫酸铜中回收铜。 在本发明的另一个实施方案中,通过从除去元素硫后残留的固体除去磁铁矿来消除焙烧步骤。