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    • 2. 发明授权
    • Optical article having a conductive anti-reflection coating
    • 具有导电抗反射涂层的光学制品
    • US4422721A
    • 1983-12-27
    • US406302
    • 1982-08-09
    • Robert E. HahnThomas R. JonesPeter H. Berning
    • Robert E. HahnThomas R. JonesPeter H. Berning
    • G02B1/11G02B1/10
    • G02B1/116
    • Optical article having a substrate with first and second surfaces and with a conductive antireflection coating disposed on the first surface. The conductive antireflection coating is comprised of at least one layer of a low index material carried by said first surface and a thin transparent conducting layer of a material having a high index of refraction carried by the layer of material having a low index of refraction. The conducting layer provides an exposed surface to which the direct electrical contact can be made. The conducting layer has an optical thickness ranging from 1.0 to 30.0 nanometers. The layer of material having a low index of refraction has its design thickness reduced to compensate for the thickness of the conducting layer whereby the conducting layer does not seriously degrade the optical performance of the coating over that which could be obtained without the use of the conducting layer.
    • 具有具有第一表面和第二表面的基底和设置在第一表面上的导电抗反射涂层的光学制品。 导电抗反射涂层由至少一层由所述第一表面承载的低折射率材料层和由具有低折射率的材料层承载的具有高折射率的材料的薄透明导电层组成。 导电层提供暴露的表面,直接电接触可以被制成。 导电层的光学厚度范围为1.0至30.0纳米。 具有低折射率的材料层具有减小的设计厚度以补偿导电层的厚度,由此导电层不会严重劣化涂层的光学性能,而不需要使用导电层 层。
    • 6. 发明授权
    • Recovery of chromium values from waste streams by the use of alkaline
magnesium compounds
    • 通过使用碱性镁化合物从废物流中回收铬值
    • US4108596A
    • 1978-08-22
    • US788583
    • 1977-04-18
    • Donald C. HemmingRobert E. HahnJohn W. Robinson, Jr.
    • Donald C. HemmingRobert E. HahnJohn W. Robinson, Jr.
    • C01G37/02C14C3/06C01G37/00
    • C14C3/06C01G37/02C01P2006/80
    • A process and a product formed thereby for the recovery of chromium values from aqueous solutions (e.g., waste liquors) comprises contacting an acidic solution containing sulfate ion and trivalent chromium ion with at least about 4 molar equivalents of MgO or Mg(OH).sub.2 per 3 molar equivalents of trivalent chromium in addition to the amount required to neutralize the free acid to a pH of about 4 to form an amorphous, dense solid, grainy, easily settleable, trivalent chromium-containing precipitate in an alkaline solution according to the equation: 3Cr.sub.2 (SO.sub.4) + 8 MgO .fwdarw.Cr.sub.2 (OH).sub.4 SO.sub.4 .multidot. 4Cr(OH).sub.3 .multidot. 4H.sub.2 O + 8 MgSO.sub.4. The trivalent chromium-containing product can be readily separated from the water and is a useful source of chromium for subsequent processing. The water remaining after separation of the precipitate contains less than 0.5 mg/l chromium.
    • 由此形成的用于从水溶液(例如废液)中回收铬值的方法和产物包括使含有硫酸根离子和三价铬离子的酸性溶液与至少约4摩尔当量的MgO或Mg(OH)2 / 3摩尔当量的三价铬,除了将游离酸中和至约4的pH所需的量以在碱性溶液中形成无定形,致密的固体,颗粒状,易沉淀的三价含铬沉淀物,根据以下等式: 3Cr2(SO4)+ 8 MgO - > Cr2(OH)4SO4 x 4Cr(OH)3 x 4H2O + 8 MgSO4。 含三价铬的产品可以容易地与水分离,并且是用于后续处理的有用的铬源。 分离沉淀后剩余的水含有少于0.5mg / l的铬。