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    • 21. 发明授权
    • Method for autoclave oxidation of ion species aqueous solutions
    • 高压氧化离子种水溶液的方法
    • US4447403A
    • 1984-05-08
    • US72304
    • 1979-09-04
    • Laurence W. BiermanGary L. LongDavid Bortner
    • Laurence W. BiermanGary L. LongDavid Bortner
    • C01B25/238C01G31/00C01G43/00C01G49/00C21B15/00C22B34/22C22B60/02
    • C22B60/0282C01B25/238C01G31/00C01G43/00C01G49/00C21B15/00C22B34/22
    • An improved method and apparatus for effecting a substantial reduction in retention time of oxidation processes by the autoclave oxidation of ion species dissolved in aqueous solutions. In one embodiment, the invention provides for oxidation of dissolved reduced ion species including ferrous iron (Fe.sup.+2), uranium (U.sup.+4) and vanadium (V.sup.+3) from wet process phosphoric acids, or for conditioning of aqueous solutions for other uses, such as corrosion control, by raising the valence state of dissolved ion species. In accordance with the present invention, pure oxygen, present in quantity of at least 94% by volume, is utilized as an oxidizing agent with specified process parameters: temperature, pressure and mixing conditions in an autoclave reaction vessel. In a presently preferred embodiment, the following specified parameters have achieved optimum results with regard to a significant decrease of retention time of the aqueous solution treated in the autoclave vessel: temperature range of from about 120.degree. F. to about 160.degree. F., pressure range of from about 120 psi to about 150 psi and effecting agitation by the use of an impeller located near the interface of the liquid and gas mixture in the vessel to provide a dispersion of the liquid solution in the gaseous phase. In accordance with such embodiment, a reduction of retention time for oxidation of uranium (U.sup.+4 .fwdarw.U.sup.+6) and vandanium (V.sup.+3 .fwdarw.V.sup.+4) metals from wet process phosphoric acid has been found to be less than two minutes, whereas, prior processes for effecting the same oxidation results have taken at least one hour.
    • 一种改进的方法和装置,用于通过溶解在水溶液中的离子物质的高压釜氧化来显着降低氧化过程的保留时间。 在一个实施方案中,本发明提供了从湿法磷酸氧化溶解的还原离子物质,包括二价铁(Fe + 2),铀(U + 4)和钒(V + 3),或用于调节其它水溶液 通过提高溶解离子物质的化合价态来应用腐蚀控制。 根据本发明,使用存在量为至少94体积%的纯氧作为氧化剂,其具有指定的工艺参数:高压釜反应容器中的温度,压力和混合条件。 在目前优选的实施方案中,以下指定参数已经获得了在高压釜容器中处理的水溶液的保留时间的显着降低的最佳结果:温度范围为约120°F至约160°F,压力 范围为约120psi至约150psi,并通过使用位于容器中的液体和气体混合物的界面附近的叶轮进行搅拌,以提供液体溶液在气相中的分散体。 根据这种实施方案,已经发现,从湿法磷酸中氧化铀(U + 4-> U + 6)和铀(V + 3→V + 4)金属的保留时间的减少已经被发现小于 两分钟,而用于实现相同氧化结果的现有方法至少需要1小时。
    • 22. 发明授权
    • Methods for the control of excessive corrosion in phosphoric acid
circuits
    • 控制磷酸回路过度腐蚀的方法
    • US4277454A
    • 1981-07-07
    • US76574
    • 1979-09-18
    • Gary L. LongRoger B. Humberger
    • Gary L. LongRoger B. Humberger
    • C01B25/225C01B25/226C23F11/04
    • C01B25/226C01B25/225C23F11/04
    • Methods for control of excessive corrosion in wet process phosphoric circuits are effected by oxidation of reduced ion species in the acid with maintenance of EMF value of the acid above about 190 millivolts (S.C.E. reference) through the digestion circuit. Supplementary monitoring is by a ceric red-ox titration procedure. In one embodied form, the present invention is utilized to control corrosion in a phosphoric acid plant digestion system (and subsequent processing equipment) operating by a dihydrate (gypsum) process even when such a process employs a calcined western U.S. phosphate ore feed from a relatively highly carbonaceous ore. The invention is also applicable for treating wet process phosphoric acid in phosphoric acid plants having a digester system operating by a hemihydrate process. In a presently preferred embodiment, additions of manganese dioxide to a primary digester in a sufficient amount effective to achieve an EMF value over about 190 millivolts will significantly control the occurrence of excessive corrosion in phosphoric acid circuits. In yet another preferred embodiment, an oxygen autoclave oxidation is used to oxidize the reduced ion species present in the acid to inhibit corrosion.
    • 用于控制湿法磷酸回路中过度腐蚀的方法是通过在酸中氧化还原的离子物质来实现的,并通过消化回路维持高于约190毫伏(S.C.E.参考)的酸的EMF值。 补充监测是通过氧化铈滴定法。 在一个实施形式中,本发明用于控制在二水合物(石膏)方法中操作的磷酸设备消化系统(和随后的加工设备)中的腐蚀,即使这种方法使用来自相对的 高含碳矿石。 本发明也适用于在具有通过半水合法处理的蒸煮器系统的磷酸设备中处理湿法磷酸。 在目前优选的实施方案中,以足以实现大约190毫伏的EMF值的足够量的一次蒸煮器添加二氧化锰将显着控制磷酸回路中过度腐蚀的发生。 在另一个优选的实施方案中,使用氧气高压釜氧化来氧化存在于酸中的还原离子种类以抑制腐蚀。
    • 30. 发明授权
    • Tissue resection device
    • 组织切除装置
    • US08216234B2
    • 2012-07-10
    • US10986602
    • 2004-11-10
    • Gary L. Long
    • Gary L. Long
    • A61B18/14
    • A61B18/14A61B18/1477A61B2017/00269A61B2018/1407
    • A medical device for performing a therapeutic procedure on a patient. The medical device includes an elongate probe extending to an applicator end sized and shaped to be slidably received in an endoscope working channel. The device also includes an injection needle positioned adjacent the applicator end of the probe. The injection needle is communicatible with a fluid source for delivering fluid and an electrical energy source for delivering electrical energy to the needle when performing the therapeutic procedure on the patient. The needle also has a central axis. The device further includes an ablating loop positioned adjacent the applicator end of the probe. The ablating loop is communicatible with the electrical energy source for delivering electrical energy to the ablating loop when performing the therapeutic procedure. The ablating loop also has a central axis that is spaced from the central axis of the injection needle. During operation of the device, the injection needle and ablating loop have opposite charges for ablating tissue of the patient.
    • 一种用于对患者执行治疗程序的医疗装置。 医疗装置包括延伸到施加器端部的细长探针,其尺寸和形状被可滑动地容纳在内窥镜工作通道中。 该装置还包括邻近探针的施用器端定位的注射针。 注射针与用于输送流体的流体源和用于在对患者执行治疗程序时将电能传递到针的电能源相互连接。 针头也有一个中心轴。 该装置还包括邻近探针的施用器端定位的消融回路。 消融回路与电能源相通,用于在执行治疗过程时将电能传递到消融回路。 烧蚀回路还具有与注射针的中心轴线间隔开的中心轴线。 在装置的操作期间,注射针和消融环具有相反的用于烧蚀患者组织的电荷。