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公开(公告)号:US5057368A
公开(公告)日:1991-10-15
申请号:US454209
申请日:1989-12-21
申请人: Theodore Largman , Fred J. Gefri , Frank Mares
发明人: Theodore Largman , Fred J. Gefri , Frank Mares
IPC分类号: D01D5/253
CPC分类号: D01D5/253 , Y10T428/2973 , Y10T428/298
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°。
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公开(公告)号:US4704480A
公开(公告)日:1987-11-03
申请号:US892545
申请日:1986-08-04
IPC分类号: C07C29/145 , C07C45/00 , C07C45/73 , C07C45/74
CPC分类号: C07C45/74 , C07C29/145 , C07C45/002 , C07C45/73
摘要: A novel process is described for the production of aliphatic ketones and an optional consequetive production of the corresponding carbinols. The starting reactants comprise ketones or aldehydes or compounds capable of converting to these in situ, such as alcohols. The reaction takes place in the presence of hydrogen in a selective temperature range, utilizing a catalyst comprising copper oxide.
摘要翻译: 描述了用于生产脂族酮的新方法,并且可选地产生相应的甲醇。 起始反应物包括酮或醛或能够原位转化为这些醇的化合物,例如醇。 反应在氢气存在下,在选择性温度范围内,使用包含氧化铜的催化剂进行。
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3.
公开(公告)号:US4003740A
公开(公告)日:1977-01-18
申请号:US646807
申请日:1976-01-06
CPC分类号: C22B15/0071 , C22B15/0006 , C22B15/0017 , C22B15/0082 , Y02P10/236
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。
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