Process for the preparation of 1,3-propanediol bis(p-aminobenzoate)
    3.
    发明授权
    Process for the preparation of 1,3-propanediol bis(p-aminobenzoate) 失效
    制备1,3-丙二醇双(对氨基苯甲酸酯)的方法

    公开(公告)号:US4476318A

    公开(公告)日:1984-10-09

    申请号:US428518

    申请日:1982-09-29

    CPC分类号: C07C227/18

    摘要: A process for the preparation of 1,3-propanediol bis(p-aminobenzoate) is described, comprising reacting a p-aminobenzoic acid alkali metal salt with dihalogenated propane in an aprotic polar solvent. In accordance with this process, diesterification proceeds under mild conditions without causing any undesirable side reactions and, therefore the desired 1,3-propanediol bis(p-aminobenzoate) can be obtained in high purity and high yield.

    摘要翻译: 描述了制备1,3-丙二醇双(对氨基苯甲酸酯)的方法,包括在非质子极性溶剂中使对氨基苯甲酸碱金属盐与二卤代丙烷反应。 根据该方法,在温和条件下进行二酯化而不引起任何不希望的副反应,因此可以以高纯度和高收率获得所需的1,3-丙二醇双(对氨基苯甲酸酯)。

    Method for reducing chromium containing raw material
    4.
    发明授权
    Method for reducing chromium containing raw material 失效
    减少含铬原料的方法

    公开(公告)号:US08262766B2

    公开(公告)日:2012-09-11

    申请号:US12543798

    申请日:2009-08-19

    IPC分类号: C21B11/00

    摘要: An object of the present invention is to provide a method for reducing a chromium-containing material at a high chromium reduction degree. In the method of the present invention, a mixture of a feedstock containing chromium oxide and a carbonaceous reductant is heated and reduced by radiation heating in a moving hearth furnace. The average rate of raising the temperature of the mixture in the reduction is preferably 13.96° C./s or higher in the period from the initiation of the radiation heating of the mixture until the mixture reaches 1,114° C.

    摘要翻译: 本发明的目的是提供一种在高铬还原度下还原含铬材料的方法。 在本发明的方法中,通过在移动的炉床炉中的辐射加热来加热和还原含有氧化铬和碳质还原剂的原料的混合物。 在从混合物的辐射加热开始到混合物达到1114℃之间的时间内,还原中混合物的温度升高的平均速率优选为13.96℃/秒或更高。

    Method for manufacturing molten iron
    5.
    发明授权
    Method for manufacturing molten iron 有权
    铁水的制造方法

    公开(公告)号:US07993428B2

    公开(公告)日:2011-08-09

    申请号:US12678533

    申请日:2008-09-18

    摘要: A method for manufacturing molten iron comprises charging a carbonaceous material, a flux, and solid reduced iron obtained by thermally reducing carbon composite iron oxide agglomerates into an arc melting furnace and melting the solid reduced iron using arc heating in the melting furnace while an inert gas is blown into a molten iron layer from a bottom blowing tuyere on a bottom of the melting furnace, wherein: a carbonaceous material suspending slag layer is formed in an upper portion of a slag layer formed on the molten iron layer when the solid reduced iron is melted into the molten iron; a carbonaceous material coating layer having the carbonaceous material is formed on the carbonaceous material suspending slag layer; and the molten iron and the slag stored in the melting furnace are tapped from a tap hole formed in a lower portion of a furnace wall of the melting furnace.

    摘要翻译: 一种制造铁水的方法包括将通过将碳复合氧化铁附聚物热还原成电弧熔化炉而获得的碳质材料,助熔剂和固体还原铁,并在熔融炉中使用电弧加热熔化固体还原铁,同时将惰性气体 从熔炉的底部的底吹风口吹入铁水层,其中:当固体还原铁为铁素体时,在铁水层上形成的渣层的上部形成有碳质的悬浮渣层 熔化成铁水; 在碳质材料悬浮渣层上形成具有碳质材料的碳质材料涂层; 并且熔融炉中熔融的铁和熔渣中的炉渣从形成在熔炉的炉壁下部的抽水孔中抽出。

    EXHAUST GAS PROCESSING SYSTEM AND METHOD FOR ROTARY HEARTH TYPE REDUCING FURNACE
    6.
    发明申请
    EXHAUST GAS PROCESSING SYSTEM AND METHOD FOR ROTARY HEARTH TYPE REDUCING FURNACE 审中-公开
    排气减速炉排气加工系统及方法

    公开(公告)号:US20100186644A1

    公开(公告)日:2010-07-29

    申请号:US12668440

    申请日:2008-06-20

    IPC分类号: F23J15/06 F28D7/00

    摘要: Provided are an exhaust gas processing system and method capable of effectively utilizing the sensible heat of an exhaust gas for preheating air for burner combustion in a rotary hearth type reducing furnace while preventing troubles caused by adhesion of dust such as blockage in an exhaust gas processing facility for a rotary hearth type reducing furnace and corrosive deterioration in the facility without increasing the facility costs excessively. The system comprises a radiant heat exchanger 2 for heat exchange between an exhaust gas exhausted from the rotary hearth type reducing furnace and air. The radiant heat exchanger 2 includes an inner cylinder 22 made of metal surrounding a space through which the exhaust gas flows; an outer cylinder 21 disposed on an outer side in a radial direction of the inner cylinder to define a flow channel between the inner cylinder and the outer cylinder 21 for allowing the air to flow so as to exchange heat with the exhaust gas; and a highly thermal conductive refractory 23 applied to an inner side of the inner cylinder 22 so as to cover an inner surface thereof.

    摘要翻译: 提供一种排气处理系统和方法,其能够有效地利用废气的显热来预热旋转式炉式还原炉中的燃烧器燃烧用空气,同时防止在排气处理设备中堵塞等灰尘附着引起的麻烦 对于旋转炉床型还原炉,并且设备的腐蚀性劣化,而不会过度增加设备成本。 该系统包括用于从旋转炉床式还原炉排出的废气与空气之间进行热交换的辐射热交换器2。 辐射热交换器2包括由围绕废气流过的空间的金属制成的内筒22; 外筒21,其设置在内筒的径向外侧,以限定内筒和外筒21之间的流路,用于使空气流动,以便与废气进行热交换; 以及以覆盖其内表面的方式施加到内筒22的内侧的高导热性耐火材料23。

    Process for producing reduced matal and agglomerate with carbonaceous material incorporated therein
    10.
    发明申请
    Process for producing reduced matal and agglomerate with carbonaceous material incorporated therein 有权
    用其中掺入碳质材料生产还原的金属和附聚物的方法

    公开(公告)号:US20060278040A1

    公开(公告)日:2006-12-14

    申请号:US10548519

    申请日:2004-03-09

    IPC分类号: C21B13/08 C21B11/06

    摘要: Agglomerates with a carbonaceous material incorporated therein and a process for producing reduced metal using the agglomerates are provided. The agglomerates are prepared with high-VM coal, which is widely and abundantly produced and is less expensive, and they provide high strength after reduction without the need for finer metal oxide particles. The agglomerates are made of a carbonaceous material and a raw material to be reduced that contains a metal oxide, such as iron ore. The carbonaceous material used is a high-VM coal containing 35% or more by mass of volatile matter. The agglomerates are formed at a pressure of at least 2 t/cm2 so that the porosity thereof is reduced to 35% or less. The reduction in porosity is effective in promoting heat transfer inside the agglomerates in a rotary hearth furnace in a high-temperature reduction step so that the sintering of reduced metal proceeds efficiently in the overall regions of the agglomerates to produce a reduced metal having high crushing strength.

    摘要翻译: 提供并入其中的含碳材料的聚集体和使用附聚物生产还原金属的方法。 聚集体由高VM煤制备,其广泛且丰富地生产并且成本较低,并且在还原后提供高强度而不需要更细的金属氧化物颗粒。 附聚物由含碳材料和待还原的原料制成,其含有诸如铁矿石的金属氧化物。 使用的碳质材料是含有35质量%以上的挥发物的高VM煤。 附聚物在至少2t / cm 2的压力下形成,使得其孔隙率降低至35%以下。 孔隙率的降低有利于在高温还原步骤中促进旋转炉底炉内的附聚物内的热传递,使得还原金属的烧结在附聚物的整个区域中有效地进行,以产生具有高抗碎强度的还原金属 。