Reduction-oxidation furnace for making phosphorus by thermal process
    1.
    发明授权
    Reduction-oxidation furnace for making phosphorus by thermal process 有权
    通过热处理制备磷的还原氧化炉

    公开(公告)号:US08741226B2

    公开(公告)日:2014-06-03

    申请号:US13321975

    申请日:2010-05-27

    IPC分类号: B01J19/00 C01B25/00

    摘要: The present invention discloses a reduction-oxidation furnace for thermally refining phosphorus. The reduction-oxidation furnace comprises a furnace body and a blow gun, wherein the furnace body has a slag outlet, a fume outlet, and a melt inlet for feeding melts formed by melting rock phosphate into the furnace body and wherein the blow gun has an end inserted into the furnace body. The content of impurities in fumes containing phosphorus pentaoxide is low, the phosphorus pentaoxide can be easily extracted with a high purity of the phosphorus pentaoxide and at low cost by means of the reduction-oxidation furnace for thermally refining phosphorus according to the present invention.

    摘要翻译: 本发明公开了一种用于热精炼磷的还原氧化炉。 还原氧化炉包括炉体和吹气枪,其中炉体具有炉渣出口,烟气出口和用于将熔融磷酸盐熔融形成的熔体进料到炉体中的熔体入口,并且其中喷枪具有 端插入炉体。 含有五氧化二磷的烟气中的杂质含量低,五氧化二磷可以用五氧化二磷的高纯度容易地提取,并且通过根据本发明的用于热精炼磷的还原氧化炉以低成本提取。

    Method for the removal of sulfur from phosphorus
    3.
    发明授权
    Method for the removal of sulfur from phosphorus 失效
    从磷中除去硫的方法

    公开(公告)号:US5296212A

    公开(公告)日:1994-03-22

    申请号:US871422

    申请日:1992-04-21

    IPC分类号: C01B25/04 C01B25/047

    CPC分类号: C01B25/04

    摘要: A method for purifying white phosphorus contaminated with sulfur bound thereto involves contacting contaminated white phosphorus with water, steam, aqueous solutions, or vaporized aqueous solutions, preferably alkaline, to remove bound sulfur from the phosphorus. The purified phosphorus is characterized by a sulfur content as low as 50 ppm.

    摘要翻译: 用于净化被硫结合的硫被污染的白磷的方法包括将受污染的白磷与水,蒸汽,水溶液或蒸发的水溶液(优选碱性)接触,以从磷中除去结合的硫。 纯化的磷的特征在于低至50ppm的硫含量。

    Monoclinic phosphorus formed from vapor in the presence of an alkali
metal
    4.
    发明授权
    Monoclinic phosphorus formed from vapor in the presence of an alkali metal 失效
    在碱金属存在下由蒸气形成单斜磷

    公开(公告)号:US4620968A

    公开(公告)日:1986-11-04

    申请号:US419537

    申请日:1982-09-17

    摘要: Monoclinic phosphorus is produced in a single source vapor transport apparatus comprising a sealed evacuated ampoule containing a mixture or compound of phosphorus and an alkali metal with the phosphorus to alkali metal ratio being 11 or greater. The charge is heated to 550.degree.-560.degree. C. and the monoclinic phosphorus crystals are formed on the cooler surface at the top of the ampoule over the temperature range of 500.degree.-560.degree. C. The preferred heating temperature is in the neighborhood of 555.degree. C. and the preferred deposition temperature is in the neighborhood of 539.degree. C. Alkali metals that may be employed include sodium, potassium, rubidium and cesium. The monoclinic phosphorus crystals form in two habits. Those formed in the presence of sodium and cesium are in the form of flat square platelets up to 4 mm on a side and 2 mm thick. These platelets may be easily cleaved into thinner platelets, like mica. The other habit formed in the presence of potassium and rubidium is in the form of a truncated pyramid up to 4 mm.times.3 mm.times.2 mm high. This habit is hard to cleave. The crystals are semiconductors with a band gap, indicated by photoluminescence, of about 2.1 eV at room temperature. Powder X-ray diffraction, and differential thermal analysis are consistent with that reported for Hittorf's phosphorus prepared according to the prior art. The crystals are a deep red on transmission and birefringent, rotating the plane of polarization in a polarizing microscope. They contain from 50 to 2000 parts per million of alkali metal and therefore may be utilized as a form of very pure phosphorus as well as for their semiconducting and birefringent qualities and as phosphors.

    摘要翻译: 在单源蒸气输送装置中制备单斜磷,其包括含有磷与碱金属的比例为11以上的磷和碱金属的混合物或化合物的密闭的真空安瓿。 将电荷加热至550〜-560℃,在500〜-560℃的温度范围内,在安瓿顶部的较冷的表面形成单斜晶磷晶体。优选的加热温度在 555℃,优选的沉积温度在539℃附近。可以使用的碱金属包括钠,钾,铷和铯。 单斜磷晶体形成两种习惯。 在钠和铯存在下形成的那些是平面方形血小板的形式,一侧高达4毫米,2mm厚。 这些血小板可以容易地切割成更薄的血小板,如云母。 在钾和铷存在下形成的另一个习惯是高达4毫米×3毫米×2毫米高的截顶棱锥的形式。 这种习惯很难解剖。 晶体是在室温下具有约2.1eV的光致发光带隙的半导体。 粉末X射线衍射和差示热分析与根据现有技术制备的Hittorf磷报道的一致。 晶体是透射和双折射的深红色,在偏光显微镜中旋转偏振平面。 它们含有50至2000ppm的碱金属,因此可以用作非常纯的磷以及它们的半导体和双折射性质以及作为荧光体的形式。

    Method for preparing high-purity elemental phosphorus and method for preparing high-purity phosphoric acid
    7.
    发明授权
    Method for preparing high-purity elemental phosphorus and method for preparing high-purity phosphoric acid 有权
    高纯度磷酸的制备方法及制备高纯度磷酸的方法

    公开(公告)号:US08747792B2

    公开(公告)日:2014-06-10

    申请号:US13179882

    申请日:2011-07-11

    IPC分类号: C01B25/02 C01B25/04 C01B25/20

    CPC分类号: C01B25/02 C01B25/04 C01B25/20

    摘要: Provided is a method for preparing high-purity elemental phosphorus capable of simultaneously reducing both arsenic and antimony from crude white phosphorus containing a great amount of arsenic and antimony as impurities. Provided is a method for preparing high-purity elemental phosphorus, the method including bringing liquid crude white phosphorus into contact with an iodic acid-containing compound selected from iodic acid and iodates in an aqueous solvent in the presence of a chelating agent, wherein the chelating agent is selected from polyvalent carboxylic acids, polyvalent carboxylates, phosphonic acid and phosphonates.

    摘要翻译: 本发明提供一种能够同时从含有大量砷和锑作为杂质的粗白磷中同时还原砷和锑的高纯度元素磷的方法。 本发明提供一种制备高纯度元素磷的方法,其特征在于,在螯合剂的存在下,在含水溶剂中使液态粗白磷与选自碘酸和碘酸的碘​​酸化合物接触, 试剂选自多价羧酸,多价羧酸酯,膦酸和膦酸酯。

    Method for decreasing the sulfur content of phosphorous
    8.
    发明授权
    Method for decreasing the sulfur content of phosphorous 失效
    降低磷含硫量的方法

    公开(公告)号:US5310530A

    公开(公告)日:1994-05-10

    申请号:US117884

    申请日:1993-09-07

    IPC分类号: C01B25/04

    CPC分类号: C01B25/04

    摘要: A method for purifying phosphorus to insure a low sulfur content involves intensively mixing phosphorus and concentrated sulfuric acid to form an emulsion, breaking the emulsion by contact with water or dilute sulfuric acid, and then immediately separating the phosphorus and diluted sulfuric acid. The separated phosphorus is then stored in water until further processing is desired and is characterized by a sulfur content as low as about 50 ppm.

    摘要翻译: 用于纯化磷以确保低硫含量的方法包括浓缩磷和浓硫酸形成乳液,通过与水或稀硫酸接触来破坏乳液,然后立即分离出磷和稀硫酸。 然后将分离的磷储存在水中直至需要进一步处理,其特征在于低至约50ppm的硫含量。