METHOD FOR COMPREHENSIVELY RECOVERING RARE EARTH ELEMENTS AND FLUORINE ELEMENT IN A BASTNAESITE TREATMENT PROCESS
    55.
    发明申请
    METHOD FOR COMPREHENSIVELY RECOVERING RARE EARTH ELEMENTS AND FLUORINE ELEMENT IN A BASTNAESITE TREATMENT PROCESS 有权
    在快速回收过程中稀土元素和荧光元素的方法

    公开(公告)号:US20150252449A1

    公开(公告)日:2015-09-10

    申请号:US14430268

    申请日:2013-09-29

    CPC classification number: C22B59/00 C22B1/02 C22B3/10 Y02P10/234

    Abstract: A method for comprehensively recovering rare earth elements and fluorine element in a bastnaesite treatment process. The method comprises: oxidation roasting a bastnaesite, and leaching a roasted mixture using a hydrochloric acid, adding a roasting promoter to the bastnaesite during the roasting process; and/or during the leaching process using the hydrochloric acid, adding a catalytic leaching promoter into the mixture, obtaining a rare earth chloride solution containing little cerium element and a cerium-rich residue containing the fluorine element; and separating and recovering rare earth fluorides from the cerium-rich residue.

    Abstract translation: 稀土元素和氟元素的综合回收方法。 该方法包括:将焙烧方法进行氧化焙烧,并用盐酸浸出焙烧混合物,并在焙烧过程中向焙烧炉中加入焙烧促进剂; 和/或在使用盐酸的浸出过程中,在混合物中加入催化浸出促进剂,得到含有少量铈元素的稀土氯化物溶液和含有氟元素的富铈残渣; 并从富铈残渣中分离回收稀土氟化物。

    CERIUM OXIDE BASED COMPOSITE POLISHING POWDER AND PREPARATION METHOD THEREOF
    56.
    发明申请
    CERIUM OXIDE BASED COMPOSITE POLISHING POWDER AND PREPARATION METHOD THEREOF 有权
    基于氧化铝的复合抛光粉及其制备方法

    公开(公告)号:US20150184027A1

    公开(公告)日:2015-07-02

    申请号:US14412366

    申请日:2013-11-07

    CPC classification number: C09G1/02

    Abstract: The present invention provides a cerium oxide based composite polishing powder and a preparation method thereof. The polishing powder contains the element magnesium in an amount of 0.005 wt %-5 wt % to magnesium oxide meter. The preparation method includes: (1) uniformly mixing a salt solution containing cerium serving as the main component of the polishing powder; (2) uniformly mixing a precipitating agent of an aqueous magnesium bicarbonate solution with the mixed solution prepared in step (1) to obtain a slurry; (3) aging the slurry prepared in step (2) for 0-48 h while the temperature of the slurry is kept at 30-90 degrees centigrade, and filtering the aged slurry to obtain the precursor powder of the polishing powder; (4) calcinating the precursor powder at 600-1000 degrees centigrade, then dispersing and separating the calcinated precursor powder to obtain the polishing powder. The present invention improves the polishing performance and the suspension performance of polishing powder.

    Abstract translation: 本发明提供了一种氧化铈基复合抛光粉及其制备方法。 抛光粉末含有与氧化镁计0.005重量%-5重量%的量的元素镁。 制备方法包括:(1)均匀混合含有作为抛光粉主要成分的铈的盐溶液; (2)将碳酸氢钠水溶液的沉淀剂与步骤(1)中制备的混合溶液均匀混合,得到浆料; (3)将浆料的温度保持在30〜90℃,将步骤(2)中制备的浆料老化0-48小时,过滤老化浆料得到抛光粉末的前体粉末; (4)在600-1000℃煅烧前体粉末,然后分散和分离煅烧的前体粉末以获得抛光粉末。 本发明提高了抛光粉的抛光性能和悬浮性能。

    ORGANIC SLURRY FOR NEODYMIUM IRON BORON SCREEN PRINTING AND PREPARATION METHOD

    公开(公告)号:US20240360329A1

    公开(公告)日:2024-10-31

    申请号:US18621650

    申请日:2024-03-29

    CPC classification number: C09D11/037

    Abstract: Disclosed are an organic slurry for neodymium iron boron screen printing and a preparation method. The organic slurry includes a rare earth powder, an organic solvent, a resin, a dispersant, and/or a leveling agent, weight percentages of which are as follows: rare earth powder 50%-90%; organic solvent 8%-50%; resin 0.4%-6%; dispersant 0%-5%; and leveling agent 0%-3%. The preparation method includes: sequentially adding the weighed organic solvent, resin, dispersant, and/or leveling agent into a mixer, stirring at a constant temperature, and then cooling to room temperature to obtain an organic carrier; adding the organic carrier and the weighed rare earth powder into a vacuum high-speed disperser, and dispersing at a high speed to obtain a crude organic slurry; and transferring the crude organic slurry to a gap adjustable three-roll grinder, and grinding to obtain a fine organic slurry.

    Optical device
    59.
    发明授权

    公开(公告)号:US11942577B2

    公开(公告)日:2024-03-26

    申请号:US17254226

    申请日:2019-08-22

    Abstract: An optical device includes an LED chip, a light absorber and/or visible-light luminescent material, and a near-infrared luminescent material, wherein a luminous power of light emitted by the near-infrared luminescent material and the light absorber and/or visible-light luminescent material in a band of 650-1000 nm under the excitation of the LED chip is A, and a sum of a luminous power of light emitted by the near-infrared and visible-light luminescent materials in a band of 350-650 nm under the excitation of the LED chip and a luminous power of residual light emitted by the LED chip in the band of 350-650 nm after the LED chip excites the near-infrared and visible-light luminescent materials is B, with B/A*100% being 0.1%-10%. According to the implementation where the optical device employs the LED chip to combine the near-infrared luminescent material and the light absorber and/or visible-light luminescent material simultaneously.

    Red light and near-infrared light-emitting material and light-emitting device

    公开(公告)号:US11718788B2

    公开(公告)日:2023-08-08

    申请号:US17254225

    申请日:2019-07-09

    CPC classification number: C09K11/7734 C09K11/7792 H01L33/26 H01L33/502

    Abstract: The present invention discloses a red light and near-infrared light-emitting material and a light-emitting device. The red light and near-infrared light-emitting material contains a compound represented by a molecular formula, xA2O3·yIn2O3·bR2O3, wherein the element A is Sc and/or Ga; the element R is one or two of Cr, Yb, Nd or Er and necessarily includes Cr; and 0.001≤x≤1, 0.001≤y≤1, 0.001≤b≤0.2, and 0.001≤b/(x+y)≤0.2. The light-emitting material can be excited by a technically mature blue light source to emit light with a high-intensity wide-spectrum or multiple spectra. Compared with existing materials, the light-emitting material has higher luminescent intensity. The light-emitting device uses an LED chip to combine an infrared light-emitting material and a visible light light-emitting material. In this way, the same LED chip can emit near-infrared light and visible light at the same time, which greatly simplifies the packaging process and reduces the packaging cost.

Patent Agency Ranking