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    • 5. 发明公开
    • EP0536196A4 -
    • EP0536196A4 - Google专利
    • EP0536196A4
    • 1995-03-01
    • EP91911435
    • 1991-06-21
    • COMMW SCIENT IND RES ORG
    • BANKS HENRY JONATHANWATERFORD COLIN JOSEPH
    • A01M13/00A01M17/00A23B20060101A23B9/00A23B9/18A23L3/3409B01J7/02B01J8/00C01B20060101C01B25/00C01B25/06
    • C01B25/06A23B9/18A23L3/3409B01J7/02B01J8/0035
    • Phosphine is generated by the reaction of water with a metal phosphide formulation. In one embodiment, the formulation is within a housing (10) closed by a membrane (12) which is permeable to water and phosphine. A water-containing gas flows across the membrane and water from the gas permeates into the housing to react with the phosphide, producing phosphine which also permeates through the membrane to enter the gas flow. Two membranes (12A, 12B) may be used to close the housing, one permeable to water, the other permeable to phosphine. A blanking plate (17) and phosphine absorber (18) may be included to control the phosphine production. In a second embodiment, pellets of a phosphide formulation are transferred, periodically, from a hopper (23) to a chamber (24) containing water. The transfer is effected by a disc member (25) mounted below the hopper and above the chamber. The disc member has at least one aperture in it, within which pellets are transported from the hopper outlet to an inlet port of the chamber. Control of the phosphine production is supplemented by varying the water temperature and by using a safety arrangement adapted to supply a purge gas to the generator. The safety arrangement utilises a reservoir (73) of the purge gas (usually dry air, nitrogen or carbon dioxide) at high pressure, established prior to the operation of the phosphine generator. If the electrical power supply to the generator fails, or if the gas pressure or the phosphine concentration in the generator is too high, a valve (78) opens to let the purge gas flow from the reservoir into the generator.
    • 膦是通过水与金属磷化物配方的反应产生的。 在一个实施方案中,所述制剂在由可透过水和膦的膜(12)封闭的壳体(10)内。 含水气体流过膜并且来自气体的水渗透到壳体中以与磷化物反应,产生磷化氢,磷化氢也渗透通过膜进入气流。 两个膜(12A,12B)可用于封闭壳体,一个可渗透水,另一个可渗透磷化氢。 可包括消隐板(17)和膦吸收剂(18)以控制膦的产生。 在第二个实施方案中,将磷化物制剂的粒料周期性地从漏斗(​​23)转移到含有水的腔室(24)中。 转移是通过安装在料斗下方和腔室上方的圆盘构件(25)实现的。 圆盘构件在其中具有至少一个孔,颗粒在该孔中从料斗出口输送到腔室的入口。 磷化氢生产的控制通过改变水温和通过使用适于向发生器供应吹扫气体的安全装置来补充。 安全装置利用高压下的清洗气体(通常为干空气,氮气或二氧化碳)的贮存器(73),其在磷化氢发生器运行之前建立。 如果发电机的电力供应发生故障,或发电机中的气体压力或磷化氢浓度太高,则打开阀门(78)以使清洗气体从储存器流入发电机。