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    • 81. 发明申请
    • METHOD FOR PRODUCING THERMALLY EXPANDED GRAPHITE
    • 生产热膨胀石墨的方法
    • WO00018683A1
    • 2000-04-06
    • PCT/RU1998/000308
    • 1998-09-30
    • C01B31/04
    • C01B32/225
    • The present invention pertains to the field of carbon-graphite materials and essentially relates to the production of thermally expanded graphite which is mainly used as a sorbant as well as in the production of graphite foils, heat- and fire-resistant coatings, gaskets, etc. The method for producing thermally expanded graphite involves dosing a powder of oxidised graphite, forming a dual-phase flow of powder particles in a gas, feeding said flow into the thermal-shock area of a tubular heater at a temperature of between 950 and 1400 DEG C, removing the expanded graphite from the heater and cooling the same. The tubular heater is arranged vertically, while the dual-phase flow is supplied into said tubular heater from the bottom at a speed at least equal to the airborne speed of the particles of oxidised graphite. The expanded graphite is cooled as it is removed from the heater through an inclined or horizontal tube. The volumetric ratio between the powder and the gas, during the dosage and the formation of the dual-phase flow, ranges preferably from 1: 750 to 1: 1400. The minimal residence time of the particles in the tubular heater varies between 0.1 and 0.4 seconds.
    • 本发明涉及碳 - 石墨材料领域,并且基本上涉及主要用作吸附剂以及生产石墨箔,耐热和耐火涂料,垫圈等的热膨胀石墨的生产 用于生产热膨胀石墨的方法包括给氧化石墨粉末进行配料,在气体中形成粉末颗粒的双相流,将所述流送入管状加热器的热冲击区域,温度为950至1400℃ DEG,从加热器中取出膨胀石墨并冷却。 管状加热器垂直布置,而双相流以至少等于氧化石墨颗粒的空气速度的底部从底部供应到所述管状加热器中。 膨胀石墨通过倾斜或水平管从加热器中取出时被冷却。 粉末和气体之间的体积比在剂量和双相流的形成期间的范围优选为1:750至1:1400。颗粒在管状加热器中的最小停留时间在0.1和0.4之间变化 秒。
    • 82. 发明申请
    • PROCESS AND DEVICE FOR OBTAINING OXIDISED GRAPHITE
    • 用于获得氧化石墨的工艺和装置
    • WO1996033949A1
    • 1996-10-31
    • PCT/RU1996000106
    • 1996-04-26
    • AVDEEV, Viktor VasilievichFINAENOV, Alexandr IvanovichNIKOLSKAYA, Irina ViktorovnaMONYAKINA, Ljudmila ArkadievnaKRASNOV, Vladimir VasilievichAPOSTOLOV, Sergei PetrovichGODUNOV, Igor AndreevichSHKIROV, Viktor AfanasievichMARTYNOV, Igor Jurievich
    • C01B31/04
    • C01B32/23C01B32/225C01P2006/11
    • The invention pertains to the technology of carbon-graphite materials, in particular to the production of oxidised graphite used as a component in fireproofing materials, and also for obtaining cellular graphite used in metallurgy, thermal power engineering, the chemical industry and other industries. The process for obtaining oxidised graphite involves treating graphite powder in an electrolytic solution of strong acids until intercalation compound are formed, hydrolysis, washing and drying of the oxidised graphite. The treatment is carried out in the presence of chemical oxidants at a constant redox potential of 0.55 - 1.55 V, and/or by anodic oxidisation of the graphite as an electrical current is passed through the graphite/acid mixture between the anode and cathode, the anode potential being kept at a constant 1-2 V and the weight ratio of acid consumption to graphite being 1-4. The strong acids used are primarily sulphuric or nitric acid. The proposed device for use in obtaining oxidised graphite comprises a reactor which is provided with a housing with an inner cylindrical surface. The housing accommodates an anode, cathode and a diaphragm situated between the cathode and anode and permeable to the acid solution. The housing also accommodates vanes mounted radially on an axial horizontal shaft so as to be capable of rotation and radial movement until abutting the anode surface. The anode is a half ring whose axis is offset relative to that of the horizontal shaft, thereby widening the gap between the anode and diaphragm by between 1.5 and 3 times from the feed pipe to the discharge pipe.
    • 本发明涉及碳 - 石墨材料的技术,特别是生产用作防火材料中的组分的氧化石墨,以及用于获得用于冶金,火力发电,化学工业和其它工业中的泡沫石墨。 获得氧化石墨的方法包括在强酸的电解溶液中处理石墨粉,直到形成螯合化合物,水解,洗涤和干燥氧化石墨。 处理在化学氧化剂存在下以0.55-1.55V的恒定氧化还原电位进行,和/或通过阳极氧化石墨,电流通过阳极和阴极之间的石墨/酸混合物, 阳极电位保持在1-2V的恒定值,酸消耗与石墨的重量比为1-4。 使用的强酸主要是硫酸或硝酸。 所提出的用于获得氧化石墨的装置包括设置有具有内圆柱表面的壳体的反应器。 壳体容纳阳极,阴极和位于阴极和阳极之间并且可渗透酸溶液的隔膜。 壳体还容纳径向安装在轴向水平轴上的叶片,以便能够旋转和径向移动直到邻接阳极表面。 阳极是半轴,其轴线相对于水平轴偏移,从而将阳极和隔膜之间的间隙从进料管扩大到排出管的1.5至3倍。